12 changed files with 1686 additions and 2912 deletions
--- a/app/Main.hs
+++ b/app/Main.hs
@ -2,21 +2,21 @@

 module Main (main) where

-import Control.Concurrent
 import Control.Monad.Except
+import Control.Monad.IO.Rerunnable
 import Control.Monad.Logger
-import Data.Bitraversable
-- import Data.Hashable
+import Control.Monad.Reader
 import qualified Data.Text.IO as TI
-import qualified Database.Esqueleto.Experimental as E
-import qualified Dhall hiding (double, record)
+import Database.Persist.Monad
+import Dhall hiding (double, record)
+import Internal.Budget
 import Internal.Database
+import Internal.History
 import Internal.Types.Main
 import Internal.Utils
 import Options.Applicative
 import RIO
 import RIO.FilePath
-- import qualified RIO.Map as M
 import qualified RIO.Text as T

 main :: IO ()
@ -30,26 +30,14 @@ main = parse =<< execParser o
            <> header "pwncash - your budget, your life"
        )

-type ConfigPath = FilePath
-
-type BudgetPath = FilePath
-
-type HistoryPath = FilePath
-
-data Options = Options !ConfigPath !Mode
+data Options = Options FilePath Mode

 data Mode
  = Reset
  | DumpCurrencies
  | DumpAccounts
  | DumpAccountKeys
-  | Sync !SyncOptions
-
-data SyncOptions = SyncOptions
-  { syncBudgets :: ![BudgetPath]
-  , syncHistories :: ![HistoryPath]
-  , syncThreads :: !Int
-  }
+  | Sync

 configFile :: Parser FilePath
 configFile =
@ -67,7 +55,7 @@ options =
    <|> getConf dumpCurrencies
    <|> getConf dumpAccounts
    <|> getConf dumpAccountKeys
-    <|> getConf sync_
+    <|> getConf sync
  where
    getConf m = Options <$> configFile <*> m

@ -108,43 +96,14 @@ dumpAccountKeys =
        <> help "Dump all account keys/aliases"
    )

-sync_ :: Parser Mode
-sync_ =
+sync :: Parser Mode
+sync =
  flag'
    Sync
    ( long "sync"
        <> short 'S'
        <> help "Sync config to database"
    )
-    <*> syncOptions
-
-syncOptions :: Parser SyncOptions
-syncOptions =
-  SyncOptions
-    <$> many
-      ( strOption
-          ( long "budget"
-              <> short 'b'
-              <> metavar "BUDGET"
-              <> help "path to a budget config"
-          )
-      )
-    <*> many
-      ( strOption
-          ( long "history"
-              <> short 'H'
-              <> metavar "HISTORY"
-              <> help "path to a history config"
-          )
-      )
-    <*> option
-      auto
-      ( long "threads"
-          <> short 't'
-          <> metavar "THREADS"
-          <> value 1
-          <> help "number of threads for syncing"
-      )

 parse :: Options -> IO ()
 parse (Options c Reset) = do
@ -153,8 +112,7 @@ parse (Options c Reset) = do
 parse (Options c DumpAccounts) = runDumpAccounts c
 parse (Options c DumpAccountKeys) = runDumpAccountKeys c
 parse (Options c DumpCurrencies) = runDumpCurrencies c
-parse (Options c (Sync SyncOptions {syncBudgets, syncHistories, syncThreads})) =
-  runSync syncThreads c syncBudgets syncHistories
+parse (Options c Sync) = runSync c

 runDumpCurrencies :: MonadUnliftIO m => FilePath -> m ()
 runDumpCurrencies c = do
@ -192,34 +150,50 @@ runDumpAccountKeys c = do
  ar <- accounts <$> readConfig c
  let ks =
        paths2IDs $
-          fmap (double . accountRFullpath . E.entityVal) $
-            fst $
-              indexAcntRoot ar
+          fmap (double . fst) $
+            concatMap (t3 . uncurry tree2Records) $
+              flattenAcntRoot ar
  mapM_ (uncurry printPair) ks
  where
    printPair i p = do
-      liftIO $ putStrLn $ T.unpack $ T.concat [acntPath2Text p, ": ", unAcntID i]
+      liftIO $ putStrLn $ T.unpack $ T.concat [acntPath2Text p, ": ", i]
+    t3 (_, _, x) = x
    double x = (x, x)

-runSync :: Int -> FilePath -> [FilePath] -> [FilePath] -> IO ()
-runSync threads c bs hs = do
-  setNumCapabilities threads
+runSync :: FilePath -> IO ()
+runSync c = do
  config <- readConfig c
-  (bs', hs') <-
-    fmap (bimap concat concat . partitionEithers) $
-      pooledMapConcurrentlyN threads (bimapM readDhall readDhall) $
-        (Left <$> bs) ++ (Right <$> hs)
+  let (hTs, hSs) = splitHistory $ statements config
  pool <- runNoLoggingT $ mkPool $ sqlConfig config
-  setNumCapabilities 1
-  handle err $ sync pool root config bs' hs'
+  handle err $ do
+    -- _ <- askLoggerIO
+
+    -- get the current DB state
+    (state, updates) <- runSqlQueryT pool $ do
+      runMigration migrateAll
+      liftIOExceptT $ getDBState config
+
+    -- read desired statements from disk
+    bSs <-
+      flip runReaderT state $
+        catMaybes <$> mapErrorsIO (readHistStmt root) hSs
+
+    -- update the DB
+    runSqlQueryT pool $ withTransaction $ flip runReaderT state $ do
+      let hTransRes = mapErrors insertHistTransfer hTs
+      let bgtRes = mapErrors insertBudget $ budget config
+      updateDBState updates -- TODO this will only work if foreign keys are deferred
+      res <- runExceptT $ do
+        mapM_ (uncurry insertHistStmt) bSs
+        combineError hTransRes bgtRes $ \_ _ -> ()
+      rerunnableIO $ fromEither res
  where
    root = takeDirectory c
-    err (AppException es) = do
+    err (InsertException es) = do
      liftIO $ mapM_ TI.putStrLn $ concatMap showError es
      exitFailure

-readConfig :: MonadUnliftIO m => FilePath -> m Config
-readConfig = fmap unfix . readDhall
+-- showBalances

-readDhall :: Dhall.FromDhall a => MonadUnliftIO m => FilePath -> m a
-readDhall confpath = liftIO $ Dhall.inputFile Dhall.auto confpath
+readConfig :: MonadUnliftIO m => FilePath -> m Config
+readConfig confpath = liftIO $ unfix <$> Dhall.inputFile Dhall.auto confpath
--- a/budget.cabal
+++ b/budget.cabal
@ -75,8 +75,7 @@ library
      ViewPatterns
  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints -Wpartial-fields -Werror -O2
  build-depends:
-      Decimal >=0.5.2
-    , base >=4.12 && <10
+      base >=4.12 && <10
    , cassava
    , conduit >=1.3.4.2
    , containers >=0.6.4.1
@ -145,8 +144,7 @@ executable pwncash
      ViewPatterns
  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints -Wpartial-fields -Werror -O2 -threaded
  build-depends:
-      Decimal >=0.5.2
-    , base >=4.12 && <10
+      base >=4.12 && <10
    , budget
    , cassava
    , conduit >=1.3.4.2
--- a/dhall/Types.dhall
+++ b/dhall/Types.dhall
@ -278,52 +278,9 @@ let DatePat =
    -}
      < Cron : CronPat.Type | Mod : ModPat.Type >

-let TxAmount1_ =
-      \(re : Type) ->
-        { a1Column : Text
-        , a1Fmt :
-            {-
-            Format of the amount field. Must include three fields for the
-            sign, numerator, and denominator of the amount.
-            -}
-            re
-        }
-
-let TxAmount1 =
-      { Type = TxAmount1_ Text
-      , default = { a1Column = "Amount", a1Fmt = "([-+])?([0-9\\.]+)" }
-      }
-
-let TxAmount2_ =
-      \(re : Type) ->
-        { a2Positive : Text
-        , a2Negative : Text
-        , a2Fmt :
-            {-
-            Format of the amount field. Must include two fields for the
-            numerator and denominator of the amount.
-            -}
-            re
-        }
-
-let TxAmount2 =
-      { Type = TxAmount2_ Text
-      , default =
-        { a2Positive = "Deposit"
-        , a2Negative = "Withdraw"
-        , a2Fmt = "([0-9\\.]+)"
-        }
-      }
-
-let TxAmountSpec_ =
-      \(re : Type) ->
-        < AmountSingle : TxAmount1_ re | AmountDual : TxAmount2_ re >
-
-let TxOpts_ =
-    {-
-    Additional metadata to use when parsing a statement
-    -}
-      \(re : Type) ->
+let TxOpts =
+    {- Additional metadata to use when parsing a statement -}
+      { Type =
          { toDate :
              {-
              Column title for date
@ -333,7 +290,7 @@ let TxOpts_ =
              {-
              Column title for amount
              -}
-            TxAmountSpec_ re
+              Text
          , toDesc :
              {-
              Column title for description
@ -351,51 +308,19 @@ let TxOpts_ =
              Data.Time.Format.formattime Haskell function.
              -}
              Text
-        , toSkipBlankDate :
-            {-
-            Skip line if date field is a blank
+          , toAmountFmt :
+              {- Format of the amount field. Must include three fields for the
+              sign, numerator, and denominator of the amount.
              -}
-            Bool
-        , toSkipBlankAmount :
-            {-
-            Skip line if amount field(s) is(are) a blank
-            -}
-            Bool
-        , toSkipBlankDescription :
-            {-
-            Skip line if description field is a blank
-            -}
-            Bool
-        , toSkipBlankOther :
-            {-
-            Skip line if any arbitrary fields are blank (these fields must also
-            be listed in 'toOther' to be considered)
-            -}
-            List Text
-        , toSkipMissingFields :
-            {-
-            Skip line if any fields are missing (this is different from blank;
-            'missing' means there is no field with name 'X', 'blank' means that
-            there is a field 'X' and its value is an empty string)
-            -}
-            Bool
+              Text
          }
-
-let TxAmountSpec = TxAmountSpec_ Text
-
-let TxOpts =
-      { Type = TxOpts_ Text
      , default =
        { toDate = "Date"
-        , toAmount = TxAmountSpec.AmountSingle TxAmount1::{=}
+        , toAmount = "Amount"
        , toDesc = "Description"
        , toOther = [] : List Text
        , toDateFmt = "%0m/%0d/%Y"
-        , toSkipBlankDate = False
-        , toSkipBlankAmount = False
-        , toSkipBlankDescription = False
-        , toSkipBlankOther = [] : List Text
-        , toSkipMissingFields = False
+        , toAmountFmt = "([-+])?([0-9]+)\\.?([0-9]+)?"
        }
      }

@ -477,45 +402,9 @@ let EntryNumGetter =

    LookupN: lookup the value from a field
    ConstN: a constant value
-    AmountN: the value of the 'Amount' column times a scaling factor
-    BalanceN: the amount required to make the target account reach a balance
-    PercentN: the amount required to make an account reach a given percentage
+    AmountN: the value of the 'Amount' column
    -}
-      < LookupN : Text
-      | ConstN : Double
-      | AmountN : Double
-      | BalanceN : Double
-      | PercentN : Double
-      >
-
-let LinkedNumGetter =
-    {-
-    Means to get a numeric value from another entry
-    -}
-      { Type =
-          { lngIndex :
-              {-
-              Index of the entry to link.
-              -}
-              Natural
-          , lngScale :
-              {-
-              Factor by which to multiply the value of the linked entry.
-              -}
-              Double
-          }
-      , default = { lngScale = 1.0, lngIndex = 0 }
-      }
-
-let LinkedEntryNumGetter =
-    {-
-    Means to get a numeric value from a statement row or another entry getter.
-
-    Linked: a number referring to the entry on the 'from' side of the
-    transaction (with 0 being the primary entry)
-    Getter: a normal getter
-    -}
-      < Linked : LinkedNumGetter.Type | Getter : EntryNumGetter >
+      < LookupN : Text | ConstN : Double | AmountN : Double >

 let EntryTextGetter =
    {-
@ -554,6 +443,7 @@ let Entry =
    -}
      \(a : Type) ->
      \(v : Type) ->
+      \(c : Type) ->
      \(t : Type) ->
        { eAcnt :
            {-
@ -565,6 +455,11 @@ let Entry =
            Pertains to value for this entry.
            -}
            v
+        , eCurrency :
+            {-
+            Pertains to value for this entry.
+            -}
+            c
        , eComment :
            {-
            A short description of this entry (if none, use a blank string)
@ -579,107 +474,35 @@ let Entry =

 let EntryGetter =
    {-
-    Means for getting an entry from a given row in a statement (debit side)
-    -}
-      \(n : Type) ->
-        { Type = Entry EntryAcntGetter n TagID
-        , default = { eComment = "", eTags = [] : List TagID }
-        }
-
-let FromEntryGetter =
-    {-
-    Means for getting an entry from a given row in a statement (debit side)
-    -}
-      EntryGetter EntryNumGetter
-
-let ToEntryGetter =
-    {-
-    Means for getting an entry from a given row in a statement (credit side)
-    -}
-      EntryGetter LinkedEntryNumGetter
-
-let TxHalfGetter =
-    {-
-    Means of transforming one row in a statement to either the credit or debit
-    half of a transaction
-    -}
-      \(e : Type) ->
-        { Type =
-            { thgAcnt :
-                {-
-                Account from which this transaction will be balanced. The value
-                of the transaction will be assigned to this account unless
-                other entries are specified (see below).
-
-                This account (and its associated entry) will be denoted
-                'primary'.
-                -}
-                EntryAcntGetter
-            , thgEntries :
-                {-
-                Means of getting additional entries from which this transaction
-                will be balanced. If this list is empty, the total value of the
-                transaction will be assigned to the value defined by 'tsgAcnt'.
-                Otherwise, the entries specified here will be added to this side
-                of this transaction, and their sum value will be subtracted from
-                the total value of the transaction and assigned to 'tsgAcnt'.
-
-                This is useful for situations where a particular transaction
-                denotes values that come from multiple subaccounts.
-                -}
-                List e
-            , thgComment :
-                {-
-                Comment for the primary entry
-                -}
-                Text
-            , thgTags :
-                {-
-                Tags for the primary entry
-                -}
-                List TagID
-            }
-        , default =
-          { thgTags = [] : List TagID
-          , thgComment = ""
-          , thgEntries = [] : List e
-          }
-        }
-
-let FromTxHalfGetter = TxHalfGetter FromEntryGetter.Type
-
-let ToTxHalfGetter = TxHalfGetter ToEntryGetter.Type
-
-let TxSubGetter =
-    {-
-    A means for transforming one row in a statement to a transaction
+    Means for getting an entry from a given row in a statement
    -}
      { Type =
-          { tsgValue : EntryNumGetter
-          , tsgCurrency : EntryCurGetter
-          , tsgFrom : (TxHalfGetter FromEntryGetter.Type).Type
-          , tsgTo : (TxHalfGetter ToEntryGetter.Type).Type
-          }
-      , default = { tsgFrom = TxHalfGetter, tsgTo = TxHalfGetter }
+          Entry EntryAcntGetter (Optional EntryNumGetter) EntryCurGetter TagID
+      , default = { eValue = None EntryNumGetter, eComment = "" }
      }

 let TxGetter =
    {-
    A means for transforming one row in a statement to a transaction
+
+    Note that N-1 entries need to be specified to make a transaction, as the
+    Nth entry will be balanced with the others.
    -}
-      { Type =
-          { tgFrom : (TxHalfGetter FromEntryGetter.Type).Type
-          , tgTo : (TxHalfGetter ToEntryGetter.Type).Type
-          , tgScale : Double
-          , tgCurrency : EntryCurGetter
-          , tgOtherEntries : List TxSubGetter.Type
-          }
-      , default =
-        { tgOtherEntries = [] : List TxSubGetter.Type
-        , tgFrom = TxHalfGetter
-        , tgTo = TxHalfGetter
-        , tgScale = 1.0
-        }
+      { tgEntries :
+          {-
+          A means of getting entries for this transaction (minimum 1)
+          -}
+          List EntryGetter.Type
+      , tgCurrency :
+          {-
+          Currency against which entries in this transaction will be balanced
+          -}
+          EntryCurGetter
+      , tgAcnt :
+          {-
+          Account in which entries in this transaction will be balanced
+          -}
+          EntryAcntGetter
      }

 let StatementParser_ =
@ -719,7 +542,7 @@ let StatementParser_ =
                a transaction. If none, don't make a transaction (eg 'skip'
                this row in the statement).
                -}
-                Optional TxGetter.Type
+                Optional TxGetter
            , spTimes :
                {-
                Match at most this many rows; if none there is no limit
@ -736,7 +559,7 @@ let StatementParser_ =
          , spVal = ValMatcher::{=}
          , spDesc = None Text
          , spOther = [] : List (FieldMatcher_ re)
-          , spTx = None TxGetter.Type
+          , spTx = None TxGetter
          , spTimes = None Natural
          , spPriority = +0
          }
@ -754,29 +577,7 @@ let Amount =
    -}
      \(w : Type) ->
      \(v : Type) ->
-        { Type =
-            { amtWhen : w, amtValue : v, amtDesc : Text, amtPriority : Integer }
-        , default.amtPriority = +0
-        }
-
-let TransferType =
-    {-
-    The type of a budget transfer.
-
-    BTFixed: Tranfer a fixed amount
-    BTPercent: Transfer a percent of the source account to destination
-    BTTarget: Transfer an amount such that the destination has a given target
-              value
-    -}
-      < TPercent | TBalance | TFixed >
-
-let TransferValue =
-    {-
-    Means to determine the value of a budget transfer.
-    -}
-      { Type = { tvVal : Double, tvType : TransferType }
-      , default.tvType = TransferType.TFixed
-      }
+        { amtWhen : w, amtValue : v, amtDesc : Text }

 let Transfer =
    {-
@ -789,24 +590,14 @@ let Transfer =
        { transFrom : a
        , transTo : a
        , transCurrency : c
-        , transAmounts : List (Amount w v).Type
-        }
-
-let TaggedAcnt =
-    {-
-    An account with a tag
-    -}
-      { Type = { taAcnt : AcntID, taTags : List TagID }
-      , default.taTags = [] : List TagID
+        , transAmounts : List (Amount w v)
        }

 let HistTransfer =
    {-
    A manually specified historical transfer
    -}
-      Transfer TaggedAcnt.Type CurID DatePat TransferValue.Type
-
-let TransferAmount = Amount DatePat TransferValue.Type
+      Transfer AcntID CurID DatePat Double

 let Statement =
    {-
@ -843,6 +634,44 @@ let History =
    -}
      < HistTransfer : HistTransfer | HistStatement : Statement >

+let Exchange =
+    {-
+    A currency exchange.
+    -}
+      { xFromCur :
+          {-
+          Starting currency of the exchange.
+          -}
+          CurID
+      , xToCur :
+          {-
+          Ending currency of the exchange.
+          -}
+          CurID
+      , xAcnt :
+          {-
+          account in which the exchange will be documented.
+          -}
+          AcntID
+      , xRate :
+          {-
+          The exchange rate between the currencies.
+          -}
+          Double
+      }
+
+let BudgetCurrency =
+    {-
+    A 'currency' in the budget; either a fixed currency or an exchange
+    -}
+      < NoX : CurID | X : Exchange >
+
+let TaggedAcnt =
+    {-
+    An account with a tag
+    -}
+      { taAcnt : AcntID, taTags : List TagID }
+
 let Allocation =
    {-
    How to allocate a given budget stream. This can be thought of as a Transfer
@ -850,7 +679,12 @@ let Allocation =
    -}
      \(w : Type) ->
      \(v : Type) ->
-        { alloTo : TaggedAcnt.Type, alloAmts : List (Amount w v).Type }
+        { alloTo : TaggedAcnt
+        , alloAmts : List (Amount w v)
+        , alloCur :
+            {-TODO allow exchanges here-}
+            CurID
+        }

 let PretaxValue =
    {-
@ -945,8 +779,6 @@ let SingleAllocation =
    -}
      Allocation {}

-let SingleAlloAmount = \(v : Type) -> Amount {} v
-
 let MultiAllocation =
    {-
    An allocation specialized to capturing multiple income streams within a given
@ -955,8 +787,6 @@ let MultiAllocation =
    -}
      Allocation Interval

-let MultiAlloAmount = \(v : Type) -> Amount Interval v
-
 let HourlyPeriod =
    {-
    Definition for a pay period denominated in hours
@ -1039,40 +869,55 @@ let Income =
              This must be an income AcntID, and is the only place income
              accounts may be specified in the entire budget.
              -}
-              TaggedAcnt.Type
+              TaggedAcnt
          , incToBal :
              {-
              The account to which to send the remainder of the income stream
              (if any) after all allocations have been applied.
              -}
-              TaggedAcnt.Type
-          , incPriority : Integer
+              TaggedAcnt
          }
      , default =
        { incPretax = [] : List (SingleAllocation PretaxValue)
        , incTaxes = [] : List (SingleAllocation TaxValue)
        , incPosttaxx = [] : List (SingleAllocation PosttaxValue)
-        , incPriority = +0
        }
      }

-let AcntMatcher_ =
+let AcntSet =
    {-
-    Regex pattern by which matching account ids will be identified
+    A list of account IDs represented as a set.
    -}
-      \(re : Type) ->
-        { Type = { amPat : re, amInvert : Bool }, default.amInvert = False }
+      { Type =
+          { asList : List AcntID
+          , asInclude :
+              {-
+              If true, tests for account membership in this set will return
+              true if the account is in the set. Invert this behavior otherwise.
+              -}
+              Bool
+          }
+      , default = { asList = [] : List AcntID, asInclude = False }
+      }

-let AcntMatcher = AcntMatcher_ Text
-
-let TransferMatcher_ =
+let TransferMatcher =
    {-
    Means to match a transfer (which will be used to "clone" it in some
    fashion)
    -}
-      \(re : Type) ->
-        { tmFrom : Optional (AcntMatcher_ re).Type
-        , tmTo : Optional (AcntMatcher_ re).Type
+      { Type =
+          { tmFrom :
+              {-
+              List of accounts (which may be empty) to match with the
+              starting account in a transfer.
+              -}
+              AcntSet.Type
+          , tmTo :
+              {-
+              List of accounts (which may be empty) to match with the
+              ending account in a transfer.
+              -}
+              AcntSet.Type
          , tmDate :
              {-
              If given, means to match the date of a transfer.
@ -1084,17 +929,25 @@ let TransferMatcher_ =
              -}
              ValMatcher.Type
          }
-
-let TransferMatcher =
-      { Type = TransferMatcher_ Text
      , default =
-        { tmFrom = None AcntMatcher.Type
-        , tmTo = None AcntMatcher.Type
+        { tmFrom = AcntSet.default
+        , tmTo = AcntSet.default
        , tmDate = None DateMatcher
        , tmVal = ValMatcher.default
        }
      }

+let BudgetTransferType =
+    {-
+    The type of a budget transfer.
+
+    BTFixed: Tranfer a fixed amount
+    BTPercent: Transfer a percent of the source account to destination
+    BTTarget: Transfer an amount such that the destination has a given target
+              value
+    -}
+      < BTPercent | BTTarget | BTFixed >
+
 let ShadowTransfer =
    {-
    A transaction analogous to another transfer with given properties.
@ -1103,17 +956,17 @@ let ShadowTransfer =
          {-
          Source of this transfer
          -}
-          TaggedAcnt.Type
+          TaggedAcnt
      , stTo :
          {-
          Destination of this transfer.
          -}
-          TaggedAcnt.Type
+          TaggedAcnt
      , stCurrency :
          {-
          Currency of this transfer.
          -}
-          CurID
+          BudgetCurrency
      , stDesc :
          {-
          Description of this transfer.
@ -1127,6 +980,7 @@ let ShadowTransfer =
          specified in other fields of this type.
          -}
          TransferMatcher.Type
+      , stType : BudgetTransferType
      , stRatio :
          {-
          Fixed multipler to translate value of matched transfer to this one.
@ -1134,11 +988,17 @@ let ShadowTransfer =
          Double
      }

+let BudgetTransferValue =
+    {-
+    Means to determine the value of a budget transfer.
+    -}
+      { btVal : Double, btType : BudgetTransferType }
+
 let BudgetTransfer =
    {-
    A manually specified transaction for a budget
    -}
-      HistTransfer
+      Transfer TaggedAcnt BudgetCurrency DatePat BudgetTransferValue

 let Budget =
    {-
@ -1180,7 +1040,6 @@ in  { CurID
    , CronPat
    , DatePat
    , TxOpts
-    , TxOpts_
    , StatementParser
    , StatementParser_
    , ValMatcher
@ -1189,13 +1048,10 @@ in  { CurID
    , FieldMatcher
    , FieldMatcher_
    , EntryNumGetter
-    , LinkedEntryNumGetter
-    , LinkedNumGetter
    , Field
    , FieldMap
    , Entry
-    , FromEntryGetter
-    , ToEntryGetter
+    , EntryGetter
    , EntryTextGetter
    , EntryCurGetter
    , EntryAcntGetter
@ -1206,11 +1062,12 @@ in  { CurID
    , Budget
    , Allocation
    , Amount
-    , TransferMatcher_
    , TransferMatcher
    , ShadowTransfer
+    , AcntSet
+    , BudgetCurrency
+    , Exchange
    , TaggedAcnt
-    , AccountTree
    , Account
    , Placeholder
    , PretaxValue
@ -1219,29 +1076,13 @@ in  { CurID
    , TaxProgression
    , TaxMethod
    , TaxValue
-    , TransferValue
-    , TransferType
+    , BudgetTransferValue
+    , BudgetTransferType
    , TxGetter
-    , TxSubGetter
-    , TxHalfGetter
-    , FromTxHalfGetter
-    , ToTxHalfGetter
    , HistTransfer
    , SingleAllocation
    , MultiAllocation
    , HourlyPeriod
    , Period
    , PeriodType
-    , TransferAmount
-    , MultiAlloAmount
-    , SingleAlloAmount
-    , AcntMatcher_
-    , AcntMatcher
-    , TxAmountSpec
-    , TxAmountSpec_
-    , TxAmount1_
-    , TxAmount2_
-    , TxAmount1
-    , TxAmount2
-    , BudgetTransfer
    }
--- a/dhall/common.dhall
+++ b/dhall/common.dhall
@ -4,10 +4,18 @@ let List/map =

 let T = ./Types.dhall

-let nullEntry =
+let nullSplit =
      \(a : T.EntryAcntGetter) ->
-      \(v : T.EntryNumGetter) ->
-        T.FromEntryGetter::{ eAcnt = a, eValue = v }
+      \(c : T.EntryCurGetter) ->
+        T.EntryGetter::{ eAcnt = a, eCurrency = c, eTags = [] : List T.TagID }
+
+let nullOpts = T.TxOpts::{=}
+
+let nullVal = T.ValMatcher::{=}
+
+let nullMatch = T.StatementParser::{=}
+
+let nullCron = T.CronPat::{=}

 let nullMod =
      \(by : Natural) ->
@ -19,22 +27,21 @@ let cron1 =
      \(m : Natural) ->
      \(d : Natural) ->
        T.DatePat.Cron
-          T.CronPat::{
-          , cpYear = Some (T.MDYPat.Single y)
+          (     nullCron
+            //  { cpYear = Some (T.MDYPat.Single y)
                , cpMonth = Some (T.MDYPat.Single m)
                , cpDay = Some (T.MDYPat.Single d)
                }
+          )

-let matchInf_ = T.StatementParser::{=}
+let matchInf_ = nullMatch

-let matchInf = \(x : T.TxGetter.Type) -> T.StatementParser::{ spTx = Some x }
+let matchInf = \(x : T.TxGetter) -> nullMatch // { spTx = Some x }

-let matchN_ = \(n : Natural) -> T.StatementParser::{ spTimes = Some n }
+let matchN_ = \(n : Natural) -> nullMatch // { spTimes = Some n }

 let matchN =
-      \(n : Natural) ->
-      \(x : T.TxGetter.Type) ->
-        matchInf x // { spTimes = Some n }
+      \(n : Natural) -> \(x : T.TxGetter) -> matchInf x // { spTimes = Some n }

 let match1_ = matchN_ 1

@ -79,45 +86,46 @@ let mRngYMD =
      \(r : Natural) ->
        T.DateMatcher.In { _1 = T.YMDMatcher.YMD (greg y m d), _2 = r }

-let PartEntry = { _1 : T.AcntID, _2 : Double, _3 : Text }
+let PartSplit = { _1 : T.AcntID, _2 : Double, _3 : Text }

-let partNFrom =
-      \(ss : List PartEntry) ->
-        let toEntry =
-              \(x : PartEntry) ->
-                T.FromEntryGetter::{
-                , eAcnt = T.EntryAcntGetter.ConstT x._1
-                , eValue = T.EntryNumGetter.ConstN x._2
+let partN =
+      \(c : T.EntryCurGetter) ->
+      \(a : T.EntryAcntGetter) ->
+      \(comment : Text) ->
+      \(ss : List PartSplit) ->
+        let toSplit =
+              \(x : PartSplit) ->
+                    nullSplit (T.EntryAcntGetter.ConstT x._1) c
+                //  { eValue = Some (T.EntryNumGetter.ConstN x._2)
                    , eComment = x._3
                    }

-        in  List/map PartEntry T.FromEntryGetter.Type toEntry ss
+        in    [ nullSplit a c // { eComment = comment } ]
+            # List/map PartSplit T.EntryGetter.Type toSplit ss

-let partNTo =
-      \(ss : List PartEntry) ->
-        let toEntry =
-              \(x : PartEntry) ->
-                T.ToEntryGetter::{
-                , eAcnt = T.EntryAcntGetter.ConstT x._1
-                , eValue =
-                    T.LinkedEntryNumGetter.Getter (T.EntryNumGetter.ConstN x._2)
-                , eComment = x._3
-                }
+let part1 =
+      \(c : T.EntryCurGetter) ->
+      \(a : T.EntryAcntGetter) ->
+      \(comment : Text) ->
+        partN c a comment ([] : List PartSplit)

-        in  List/map PartEntry T.ToEntryGetter.Type toEntry ss
+let part1_ =
+      \(c : T.EntryCurGetter) ->
+      \(a : T.EntryAcntGetter) ->
+        partN c a "" ([] : List PartSplit)

 let addDay =
      \(x : T.GregorianM) ->
      \(d : Natural) ->
        { gYear = x.gmYear, gMonth = x.gmMonth, gDay = d }

-let mvP = T.ValMatcher::{ vmSign = Some True }
+let mvP = nullVal // { vmSign = Some True }

-let mvN = T.ValMatcher::{ vmSign = Some False }
+let mvN = nullVal // { vmSign = Some False }

-let mvNum = \(x : Natural) -> T.ValMatcher::{ vmNum = Some x }
+let mvNum = \(x : Natural) -> nullVal // { vmNum = Some x }

-let mvDen = \(x : Natural) -> T.ValMatcher::{ vmDen = Some x }
+let mvDen = \(x : Natural) -> nullVal // { vmDen = Some x }

 let mvNumP = \(x : Natural) -> mvP // { vmNum = Some x }

@ -127,7 +135,13 @@ let mvDenP = \(x : Natural) -> mvP // { vmDen = Some x }

 let mvDenN = \(x : Natural) -> mvN // { vmDen = Some x }

-in      { cron1
+in      { nullSplit
+        , nullMatch
+        , nullVal
+        , nullOpts
+        , nullCron
+        , nullMod
+        , cron1
        , mY
        , mYM
        , mYMD
@ -142,8 +156,9 @@ in      { cron1
        , match1
        , greg
        , gregM
-        , partNFrom
-        , partNTo
+        , partN
+        , part1
+        , part1_
        , addDay
        , comma = 44
        , tab = 9
@ -155,8 +170,6 @@ in      { cron1
        , mvDen
        , mvDenP
        , mvDenN
-        , PartEntry
-        , nullEntry
-        , nullMod
+        , PartSplit
        }
    /\  T
--- a/lib/Internal/Budget.hs
+++ b/lib/Internal/Budget.hs
@ -1,9 +1,9 @@
-module Internal.Budget (readBudgetCRUD) where
+module Internal.Budget (insertBudget) where

 import Control.Monad.Except
-import Data.Decimal hiding (allocate)
 import Data.Foldable
-import Data.Hashable
+import Database.Persist.Monad
+import Internal.Database
 import Internal.Types.Main
 import Internal.Utils
 import RIO hiding (to)
@ -13,13 +13,22 @@ import qualified RIO.NonEmpty as NE
 import qualified RIO.Text as T
 import RIO.Time

-readBudgetCRUD :: (MonadAppError m, MonadFinance m) => PreBudgetCRUD -> m FinalBudgetCRUD
-readBudgetCRUD o@CRUDOps {coCreate} = do
-  bs <- mapM readBudget coCreate
-  return $ o {coCreate = bs}
+-- each budget (designated at the top level by a 'name') is processed in the
+-- following steps
+-- 1. expand all transactions given the desired date range and date patterns for
+--    each directive in the budget
+-- 2. sort all transactions by date
+-- 3. propagate all balances forward, and while doing so assign values to each
+--    transaction (some of which depend on the 'current' balance of the
+--    target account)
+-- 4. assign shadow transactions
+-- 5. insert all transactions

-readBudget :: (MonadAppError m, MonadFinance m) => Budget -> m (BudgetName, [Tx CommitR])
-readBudget
+insertBudget
+  :: (MonadInsertError m, MonadSqlQuery m, MonadFinance m)
+  => Budget
+  -> m ()
+insertBudget
  b@Budget
    { bgtLabel
    , bgtIncomes
@ -30,18 +39,15 @@ readBudget
    , bgtPosttax
    , bgtInterval
    } =
-    do
-      spanRes <- getSpan
-      (bgtLabel,) <$> case spanRes of
-        Nothing -> return []
-        Just budgetSpan -> do
+    whenHash CTBudget b () $ \key -> do
      (intAllos, _) <- combineError intAlloRes acntRes (,)
-          let res1 = mapErrors (readIncome c intAllos budgetSpan) bgtIncomes
-          let res2 = expandTransfers c budgetSpan bgtTransfers
-          combineErrorM (concat <$> res1) res2 $ \is ts ->
-            addShadowTransfers bgtShadowTransfers (is ++ ts)
+      let res1 = mapErrors (insertIncome key bgtLabel intAllos bgtInterval) bgtIncomes
+      let res2 = expandTransfers key bgtLabel bgtInterval bgtTransfers
+      txs <- combineError (concat <$> res1) res2 (++)
+      m <- askDBState kmCurrency
+      shadow <- liftExcept $ addShadowTransfers m bgtShadowTransfers txs
+      void $ mapErrors insertBudgetTx $ balanceTransfers $ txs ++ shadow
    where
-      c = CommitR (CommitHash $ hash b) CTBudget
      acntRes = mapErrors isNotIncomeAcnt alloAcnts
      intAlloRes = combineError3 pre_ tax_ post_ (,,)
      pre_ = sortAllos bgtPretax
@ -52,15 +58,73 @@ readBudget
        (alloAcnt <$> bgtPretax)
          ++ (alloAcnt <$> bgtTax)
          ++ (alloAcnt <$> bgtPosttax)
-      getSpan = do
-        globalSpan <- asks (unBSpan . tsBudgetScope)
-        case bgtInterval of
-          Nothing -> return $ Just globalSpan
-          Just bi -> do
-            localSpan <- liftExcept $ resolveDaySpan bi
-            return $ intersectDaySpan globalSpan localSpan

-sortAllo :: MultiAllocation v -> AppExcept (DaySpanAllocation v)
+balanceTransfers :: [UnbalancedTransfer] -> [BalancedTransfer]
+balanceTransfers = snd . L.mapAccumR go M.empty . reverse . L.sortOn ftWhen
+  where
+    go bals f@FlatTransfer {ftFrom, ftTo, ftValue = UnbalancedValue {cvValue, cvType}} =
+      let balTo = M.findWithDefault 0 ftTo bals
+          x = amtToMove balTo cvType cvValue
+          bals' = mapAdd_ ftTo x $ mapAdd_ ftFrom (-x) bals
+       in (bals', f {ftValue = x})
+    -- TODO might need to query signs to make this intuitive; as it is this will
+    -- probably work, but for credit accounts I might need to supply a negative
+    -- target value
+    amtToMove _ BTFixed x = x
+    amtToMove bal BTPercent x = -(x / 100 * bal)
+    amtToMove bal BTTarget x = x - bal
+
+-- TODO this seems too general for this module
+mapAdd_ :: (Ord k, Num v) => k -> v -> M.Map k v -> M.Map k v
+mapAdd_ k v = M.alter (maybe (Just v) (Just . (+ v))) k
+
+insertBudgetTx
+  :: (MonadInsertError m, MonadSqlQuery m, MonadFinance m)
+  => BalancedTransfer
+  -> m ()
+insertBudgetTx FlatTransfer {ftFrom, ftTo, ftMeta, ftCur, ftValue, ftDesc, ftWhen} = do
+  ((sFrom, sTo), exchange) <- entryPair ftFrom ftTo ftCur ftValue
+  insertPair sFrom sTo
+  forM_ exchange $ uncurry insertPair
+  where
+    insertPair from to = do
+      k <- insert $ TransactionR (bmCommit ftMeta) ftWhen ftDesc
+      insertBudgetLabel k from
+      insertBudgetLabel k to
+    insertBudgetLabel k entry = do
+      sk <- insertEntry k entry
+      insert_ $ BudgetLabelR sk $ bmName ftMeta
+
+entryPair
+  :: (MonadInsertError m, MonadFinance m)
+  => TaggedAcnt
+  -> TaggedAcnt
+  -> BudgetCurrency
+  -> Rational
+  -> m (EntryPair, Maybe EntryPair)
+entryPair from to cur val = case cur of
+  NoX curid -> (,Nothing) <$> pair curid from to val
+  X Exchange {xFromCur, xToCur, xAcnt, xRate} -> do
+    let middle = TaggedAcnt xAcnt []
+    let res1 = pair xFromCur from middle val
+    let res2 = pair xToCur middle to (val * roundPrecision 3 xRate)
+    combineError res1 res2 $ \a b -> (a, Just b)
+  where
+    pair curid from_ to_ v = do
+      let s1 = entry curid from_ (-v)
+      let s2 = entry curid to_ v
+      combineError s1 s2 (,)
+    entry c TaggedAcnt {taAcnt, taTags} v =
+      resolveEntry $
+        Entry
+          { eAcnt = taAcnt
+          , eValue = v
+          , eComment = ""
+          , eCurrency = c
+          , eTags = taTags
+          }
+
+sortAllo :: MultiAllocation v -> InsertExcept (DaySpanAllocation v)
 sortAllo a@Allocation {alloAmts = as} = do
  bs <- foldSpan [] $ L.sortOn amtWhen as
  return $ a {alloAmts = reverse bs}
@ -79,101 +143,100 @@ sortAllo a@Allocation {alloAmts = as} = do
 -- TODO this will scan the interval allocations fully each time
 -- iteration which is a total waste, but the fix requires turning this
 -- loop into a fold which I don't feel like doing now :(
-readIncome
-  :: (MonadAppError m, MonadFinance m)
-  => CommitR
+insertIncome
+  :: (MonadInsertError m, MonadFinance m)
+  => CommitRId
+  -> T.Text
  -> IntAllocations
-  -> DaySpan
+  -> Maybe Interval
  -> Income
-  -> m [Tx CommitR]
-readIncome
+  -> m [UnbalancedTransfer]
+insertIncome
  key
+  name
  (intPre, intTax, intPost)
-  ds
+  localInterval
  Income
    { incWhen
    , incCurrency
-    , incFrom = TaggedAcnt {taAcnt = srcAcnt, taTags = srcTags}
+    , incFrom
    , incPretax
    , incPosttax
    , incTaxes
-    , incToBal = TaggedAcnt {taAcnt = destAcnt, taTags = destTags}
+    , incToBal
    , incGross
    , incPayPeriod
-    , incPriority
    } =
    combineErrorM
      (combineError incRes nonIncRes (,))
-      (combineError cpRes dayRes (,))
-      $ \_ (cp, days) -> do
-        let gross = realFracToDecimalP (cpPrec cp) incGross
-        foldDays (allocate cp gross) start days
+      (combineError precRes dayRes (,))
+      $ \_ (precision, days) -> do
+        let gross = roundPrecision precision incGross
+        concat <$> foldDays (allocate precision gross) start days
    where
-      srcAcnt' = AcntID srcAcnt
-      destAcnt' = AcntID destAcnt
-      incRes = isIncomeAcnt srcAcnt'
+      incRes = isIncomeAcnt $ taAcnt incFrom
      nonIncRes =
        mapErrors isNotIncomeAcnt $
-          destAcnt'
+          taAcnt incToBal
            : (alloAcnt <$> incPretax)
            ++ (alloAcnt <$> incTaxes)
            ++ (alloAcnt <$> incPosttax)
-      cpRes = lookupCurrency incCurrency
-      dayRes = liftExcept $ expandDatePat ds incWhen
+      precRes = lookupCurrencyPrec incCurrency
+      dayRes = askDays incWhen localInterval
      start = fromGregorian' $ pStart incPayPeriod
      pType' = pType incPayPeriod
+      meta = BudgetMeta key name
      flatPre = concatMap flattenAllo incPretax
      flatTax = concatMap flattenAllo incTaxes
      flatPost = concatMap flattenAllo incPosttax
      sumAllos = sum . fmap faValue
-      entry0 a c ts = Entry {eAcnt = a, eValue = (), eComment = c, eTags = ts}
-      allocate cp gross prevDay day = do
+      -- TODO ensure these are all the "correct" accounts
+      allocate precision gross prevDay day = do
        scaler <- liftExcept $ periodScaler pType' prevDay day
-        let precision = cpPrec cp
        let (preDeductions, pre) =
              allocatePre precision gross $
                flatPre ++ concatMap (selectAllos day) intPre
-        let tax =
+            tax =
              allocateTax precision gross preDeductions scaler $
                flatTax ++ concatMap (selectAllos day) intTax
            aftertaxGross = gross - sumAllos (tax ++ pre)
-        let post =
+            post =
              allocatePost precision aftertaxGross $
                flatPost ++ concatMap (selectAllos day) intPost
-        let src = entry0 srcAcnt' "gross income" (TagID <$> srcTags)
-        let dest = entry0 destAcnt' "balance after deductions" (TagID <$> destTags)
-        let allos = allo2Trans <$> (pre ++ tax ++ post)
-        let primary =
-              EntrySet
-                { esTotalValue = -gross
-                , esCurrency = cpID cp
-                , esFrom = HalfEntrySet {hesPrimary = src, hesOther = []}
-                , esTo = HalfEntrySet {hesPrimary = dest, hesOther = allos}
-                }
-        return $
-          Tx
-            { txMeta = TxMeta day incPriority (TxDesc "") key
-            , txPrimary = Left primary
-            , txOther = []
+            balance = aftertaxGross - sumAllos post
+            bal =
+              FlatTransfer
+                { ftMeta = meta
+                , ftWhen = day
+                , ftFrom = incFrom
+                , ftCur = NoX incCurrency
+                , ftTo = incToBal
+                , ftValue = UnbalancedValue BTFixed balance
+                , ftDesc = "balance after deductions"
                }
+         in if balance < 0
+              then throwError $ InsertException [IncomeError day name balance]
+              else return (bal : fmap (allo2Trans meta day incFrom) (pre ++ tax ++ post))

 periodScaler
  :: PeriodType
  -> Day
  -> Day
-  -> AppExcept PeriodScaler
+  -> InsertExcept PeriodScaler
 periodScaler pt prev cur = return scale
  where
-    n = workingDays wds prev cur
+    n = fromIntegral $ workingDays wds prev cur
    wds = case pt of
      Hourly HourlyPeriod {hpWorkingDays} -> hpWorkingDays
      Daily ds -> ds
-    scale prec x = case pt of
+    scale precision x = case pt of
      Hourly HourlyPeriod {hpAnnualHours, hpDailyHours} ->
-        realFracToDecimalP prec (x / fromIntegral hpAnnualHours)
+        fromRational (rnd $ x / fromIntegral hpAnnualHours)
          * fromIntegral hpDailyHours
-          * fromIntegral n
-      Daily _ -> realFracToDecimalP prec (x * fromIntegral n / 365.25)
+          * n
+      Daily _ -> x * n / 365.25
+      where
+        rnd = roundPrecision precision

 -- ASSUME start < end
 workingDays :: [Weekday] -> Day -> Day -> Natural
@ -189,7 +252,7 @@ workingDays wds start end = fromIntegral $ daysFull + daysTail

 -- ASSUME days is a sorted list
 foldDays
-  :: MonadAppError m
+  :: MonadInsertError m
  => (Day -> Day -> m a)
  -> Day
  -> [Day]
@ -199,27 +262,27 @@ foldDays f start days = case NE.nonEmpty days of
  Just ds
    | any (start >) ds ->
        throwError $
-          AppException [PeriodError start $ minimum ds]
+          InsertException [PeriodError start $ minimum ds]
    | otherwise ->
        combineErrors $
          snd $
            L.mapAccumL (\prevDay day -> (day, f prevDay day)) start days

-isIncomeAcnt :: (MonadAppError m, MonadFinance m) => AcntID -> m ()
+isIncomeAcnt :: (MonadInsertError m, MonadFinance m) => AcntID -> m ()
 isIncomeAcnt = checkAcntType IncomeT

-isNotIncomeAcnt :: (MonadAppError m, MonadFinance m) => AcntID -> m ()
+isNotIncomeAcnt :: (MonadInsertError m, MonadFinance m) => AcntID -> m ()
 isNotIncomeAcnt = checkAcntTypes (AssetT :| [EquityT, ExpenseT, LiabilityT])

 checkAcntType
-  :: (MonadAppError m, MonadFinance m)
+  :: (MonadInsertError m, MonadFinance m)
  => AcntType
  -> AcntID
  -> m ()
 checkAcntType t = checkAcntTypes (t :| [])

 checkAcntTypes
-  :: (MonadAppError m, MonadFinance m)
+  :: (MonadInsertError m, MonadFinance m)
  => NE.NonEmpty AcntType
  -> AcntID
  -> m ()
@ -227,70 +290,83 @@ checkAcntTypes ts i = void $ go =<< lookupAccountType i
  where
    go t
      | t `L.elem` ts = return i
-      | otherwise = throwError $ AppException [AccountTypeError i ts]
+      | otherwise = throwError $ InsertException [AccountError i ts]

 flattenAllo :: SingleAllocation v -> [FlatAllocation v]
-flattenAllo Allocation {alloAmts, alloTo} = fmap go alloAmts
+flattenAllo Allocation {alloAmts, alloCur, alloTo} = fmap go alloAmts
  where
    go Amount {amtValue, amtDesc} =
      FlatAllocation
-        { faTo = alloTo
+        { faCur = NoX alloCur
+        , faTo = alloTo
        , faValue = amtValue
        , faDesc = amtDesc
        }

 -- ASSUME allocations are sorted
 selectAllos :: Day -> DaySpanAllocation v -> [FlatAllocation v]
-selectAllos day Allocation {alloAmts, alloTo} =
+selectAllos day Allocation {alloAmts, alloCur, alloTo} =
  go <$> filter ((`inDaySpan` day) . amtWhen) alloAmts
  where
    go Amount {amtValue, amtDesc} =
      FlatAllocation
-        { faTo = alloTo
+        { faCur = NoX alloCur
+        , faTo = alloTo
        , faValue = amtValue
        , faDesc = amtDesc
        }

-allo2Trans :: FlatAllocation Decimal -> Entry AcntID EntryLink TagID
-allo2Trans FlatAllocation {faValue, faTo = TaggedAcnt {taAcnt, taTags}, faDesc} =
-  Entry
-    { eValue = LinkValue (EntryFixed faValue)
-    , eComment = faDesc
-    , eAcnt = AcntID taAcnt
-    , eTags = TagID <$> taTags
+allo2Trans
+  :: BudgetMeta
+  -> Day
+  -> TaggedAcnt
+  -> FlatAllocation Rational
+  -> UnbalancedTransfer
+allo2Trans meta day from FlatAllocation {faValue, faTo, faDesc, faCur} =
+  FlatTransfer
+    { ftMeta = meta
+    , ftWhen = day
+    , ftFrom = from
+    , ftCur = faCur
+    , ftTo = faTo
+    , ftValue = UnbalancedValue BTFixed faValue
+    , ftDesc = faDesc
    }

-type PreDeductions = M.Map T.Text Decimal
-
 allocatePre
-  :: Precision
-  -> Decimal
+  :: Natural
+  -> Rational
  -> [FlatAllocation PretaxValue]
-  -> (PreDeductions, [FlatAllocation Decimal])
+  -> (M.Map T.Text Rational, [FlatAllocation Rational])
 allocatePre precision gross = L.mapAccumR go M.empty
  where
-    go m f@FlatAllocation {faValue = PretaxValue {preCategory, preValue, prePercent}} =
-      let v =
-            if prePercent
-              then gross *. (preValue / 100)
-              else realFracToDecimalP precision preValue
-       in (mapAdd_ preCategory v m, f {faValue = v})
+    go m f@FlatAllocation {faValue} =
+      let c = preCategory faValue
+          p = preValue faValue
+          v =
+            if prePercent faValue
+              then (roundPrecision 3 p / 100) * gross
+              else roundPrecision precision p
+       in (mapAdd_ c v m, f {faValue = v})

 allocateTax
-  :: Precision
-  -> Decimal
-  -> PreDeductions
+  :: Natural
+  -> Rational
+  -> M.Map T.Text Rational
  -> PeriodScaler
  -> [FlatAllocation TaxValue]
-  -> [FlatAllocation Decimal]
+  -> [FlatAllocation Rational]
 allocateTax precision gross preDeds f = fmap (fmap go)
  where
    go TaxValue {tvCategories, tvMethod} =
      let agi = gross - sum (mapMaybe (`M.lookup` preDeds) tvCategories)
       in case tvMethod of
-            TMPercent p -> agi *. p / 100
+            TMPercent p ->
+              roundPrecision precision $
+                fromRational $
+                  roundPrecision 3 p / 100 * agi
            TMBracket TaxProgression {tpDeductible, tpBrackets} ->
-              let taxDed = f precision tpDeductible
+              let taxDed = roundPrecision precision $ f precision tpDeductible
               in foldBracket f precision (agi - taxDed) tpBrackets

 -- | Compute effective tax percentage of a bracket
@ -304,102 +380,174 @@ allocateTax precision gross preDeds f = fmap (fmap go)
 --
 -- In reality, this can all be done with one loop, but it isn't clear these
 -- three steps are implemented from this alone.
-foldBracket :: PeriodScaler -> Precision -> Decimal -> [TaxBracket] -> Decimal
-foldBracket f prec agi bs = fst $ foldr go (0, agi) $ L.sortOn tbLowerLimit bs
+foldBracket :: PeriodScaler -> Natural -> Rational -> [TaxBracket] -> Rational
+foldBracket f precision agi bs = fst $ foldr go (0, agi) $ L.sortOn tbLowerLimit bs
  where
    go TaxBracket {tbLowerLimit, tbPercent} a@(acc, remain) =
-      let l = f prec tbLowerLimit
-       in if remain >= l
-            then (acc + (remain - l) *. (tbPercent / 100), l)
-            else a
+      let l = roundPrecision precision $ f precision tbLowerLimit
+          p = roundPrecision 3 tbPercent / 100
+       in if remain >= l then (acc + p * (remain - l), l) else a

 allocatePost
-  :: Precision
-  -> Decimal
+  :: Natural
+  -> Rational
  -> [FlatAllocation PosttaxValue]
-  -> [FlatAllocation Decimal]
-allocatePost prec aftertax = fmap (fmap go)
+  -> [FlatAllocation Rational]
+allocatePost precision aftertax = fmap (fmap go)
  where
-    go PosttaxValue {postValue, postPercent}
-      | postPercent = aftertax *. (postValue / 100)
-      | otherwise = realFracToDecimalP prec postValue
+    go PosttaxValue {postValue, postPercent} =
+      let v = postValue
+       in if postPercent
+            then aftertax * roundPrecision 3 v / 100
+            else roundPrecision precision v
+
+--------------------------------------------------------------------------------
+-- Standalone Transfer
+
+expandTransfers
+  :: (MonadInsertError m, MonadSqlQuery m, MonadFinance m)
+  => CommitRId
+  -> T.Text
+  -> Maybe Interval
+  -> [BudgetTransfer]
+  -> m [UnbalancedTransfer]
+expandTransfers key name localInterval ts = do
+  txs <-
+    fmap (L.sortOn ftWhen . concat) $
+      combineErrors $
+        fmap (expandTransfer key name) ts
+  case localInterval of
+    Nothing -> return txs
+    Just i -> do
+      bounds <- liftExcept $ resolveDaySpan i
+      return $ filter (inDaySpan bounds . ftWhen) txs
+
+expandTransfer
+  :: (MonadInsertError m, MonadSqlQuery m, MonadFinance m)
+  => CommitRId
+  -> T.Text
+  -> BudgetTransfer
+  -> m [UnbalancedTransfer]
+expandTransfer key name Transfer {transAmounts, transTo, transCurrency, transFrom} = do
+  precision <- lookupCurrencyPrec $ initialCurrency transCurrency
+  fmap concat $ combineErrors $ fmap (go precision) transAmounts
+  where
+    go
+      precision
+      Amount
+        { amtWhen = pat
+        , amtValue = BudgetTransferValue {btVal = v, btType = y}
+        , amtDesc = desc
+        } =
+        withDates pat $ \day -> do
+          let meta = BudgetMeta {bmCommit = key, bmName = name}
+          return
+            FlatTransfer
+              { ftMeta = meta
+              , ftWhen = day
+              , ftCur = transCurrency
+              , ftFrom = transFrom
+              , ftTo = transTo
+              , ftValue = UnbalancedValue y $ roundPrecision precision v
+              , ftDesc = desc
+              }
+
+withDates
+  :: (MonadSqlQuery m, MonadFinance m, MonadInsertError m)
+  => DatePat
+  -> (Day -> m a)
+  -> m [a]
+withDates dp f = do
+  bounds <- askDBState kmBudgetInterval
+  days <- liftExcept $ expandDatePat bounds dp
+  combineErrors $ fmap f days

 --------------------------------------------------------------------------------
 -- shadow transfers

 -- TODO this is going to be O(n*m), which might be a problem?
 addShadowTransfers
-  :: (MonadAppError m, MonadFinance m)
-  => [ShadowTransfer]
-  -> [Tx CommitR]
-  -> m [Tx CommitR]
-addShadowTransfers ms = mapErrors go
-  where
-    go tx = do
-      es <- catMaybes <$> mapErrors (fromShadow tx) ms
-      return $ tx {txOther = Right <$> es}
+  :: CurrencyMap
+  -> [ShadowTransfer]
+  -> [UnbalancedTransfer]
+  -> InsertExcept [UnbalancedTransfer]
+addShadowTransfers cm ms txs =
+  fmap catMaybes $
+    combineErrors $
+      fmap (uncurry (fromShadow cm)) $
+        [(t, m) | t <- txs, m <- ms]

 fromShadow
-  :: (MonadAppError m, MonadFinance m)
-  => Tx CommitR
+  :: CurrencyMap
+  -> UnbalancedTransfer
  -> ShadowTransfer
-  -> m (Maybe ShadowEntrySet)
-fromShadow tx ShadowTransfer {stFrom, stTo, stDesc, stRatio, stCurrency, stMatch} =
-  combineErrorM curRes mRes $ \cur compiled -> do
-    res <- liftExcept $ shadowMatches compiled tx
-    let es = entryPair stFrom stTo cur stDesc stRatio ()
-    return $ if not res then Nothing else Just es
-  where
-    curRes = lookupCurrencyKey stCurrency
-    mRes = liftExcept $ compileMatch stMatch
-
-shadowMatches :: TransferMatcherRe -> Tx CommitR -> AppExcept Bool
-shadowMatches
-  TransferMatcher_ {tmFrom, tmTo, tmDate, tmVal}
-  Tx {txPrimary, txMeta = TxMeta {txmDate}} =
-    do
-      -- ASSUME these will never fail and thus I don't need to worry about
-      -- stacking the errors
-      fromRes <- acntMatches fa tmFrom
-      toRes <- acntMatches ta tmTo
-      -- NOTE this will only match against the primary entry set since those
-      -- are what are guaranteed to exist from a transfer
-      valRes <- case txPrimary of
-        Left es -> valMatches tmVal $ toRational $ esTotalValue es
-        Right _ -> return True
+  -> InsertExcept (Maybe UnbalancedTransfer)
+fromShadow cm tx t@ShadowTransfer {stFrom, stTo, stDesc, stRatio, stCurrency, stType} = do
+  res <- shadowMatches (stMatch t) tx
+  v <- roundPrecisionCur (initialCurrency stCurrency) cm stRatio
  return $
-        fromRes
-          && toRes
-          && maybe True (`dateMatches` txmDate) tmDate
+    if not res
+      then Nothing
+      else
+        Just $
+          FlatTransfer
+            { ftMeta = ftMeta tx
+            , ftWhen = ftWhen tx
+            , ftCur = stCurrency
+            , ftFrom = stFrom
+            , ftTo = stTo
+            , ftValue = UnbalancedValue stType $ v * cvValue (ftValue tx)
+            , ftDesc = stDesc
+            }
+
+shadowMatches :: TransferMatcher -> UnbalancedTransfer -> InsertExcept Bool
+shadowMatches TransferMatcher {tmFrom, tmTo, tmDate, tmVal} tx = do
+  valRes <- valMatches tmVal $ cvValue $ ftValue tx
+  return $
+    memberMaybe (taAcnt $ ftFrom tx) tmFrom
+      && memberMaybe (taAcnt $ ftTo tx) tmTo
+      && maybe True (`dateMatches` ftWhen tx) tmDate
      && valRes
  where
-      fa = either getAcntFrom getAcntFrom txPrimary
-      ta = either getAcntTo getAcntTo txPrimary
-      getAcntFrom = getAcnt esFrom
-      getAcntTo = getAcnt esTo
-      getAcnt f = eAcnt . hesPrimary . f
-      acntMatches (AcntID a) = maybe (return True) (match' a)
-      match' a AcntMatcher_ {amPat, amInvert} =
-        (if amInvert then not else id) <$> matchMaybe a amPat
-
-compileMatch :: TransferMatcher_ T.Text -> AppExcept TransferMatcherRe
-compileMatch m@TransferMatcher_ {tmTo, tmFrom} =
-  combineError tres fres $ \t f -> m {tmTo = t, tmFrom = f}
-  where
-    go a@AcntMatcher_ {amPat} = do
-      (_, p) <- compileRegex False amPat
-      return $ a {amPat = p}
-    tres = mapM go tmTo
-    fres = mapM go tmFrom
-
-- memberMaybe x AcntSet {asList, asInclude} =
--   (if asInclude then id else not) $ x `elem` (AcntID <$> asList)
+    memberMaybe x AcntSet {asList, asInclude} =
+      (if asInclude then id else not) $ x `elem` asList

 --------------------------------------------------------------------------------
 -- random

+initialCurrency :: BudgetCurrency -> CurID
+initialCurrency (NoX c) = c
+initialCurrency (X Exchange {xFromCur = c}) = c
+
 alloAcnt :: Allocation w v -> AcntID
-alloAcnt = AcntID . taAcnt . alloTo
+alloAcnt = taAcnt . alloTo
+
+data UnbalancedValue = UnbalancedValue
+  { cvType :: !BudgetTransferType
+  , cvValue :: !Rational
+  }
+  deriving (Show)
+
+type UnbalancedTransfer = FlatTransfer UnbalancedValue
+
+type BalancedTransfer = FlatTransfer Rational
+
+data FlatTransfer v = FlatTransfer
+  { ftFrom :: !TaggedAcnt
+  , ftTo :: !TaggedAcnt
+  , ftValue :: !v
+  , ftWhen :: !Day
+  , ftDesc :: !T.Text
+  , ftMeta :: !BudgetMeta
+  , ftCur :: !BudgetCurrency
+  }
+  deriving (Show)
+
+data BudgetMeta = BudgetMeta
+  { bmCommit :: !CommitRId
+  , bmName :: !T.Text
+  }
+  deriving (Show)

 type IntAllocations =
  ( [DaySpanAllocation PretaxValue]
@ -409,11 +557,14 @@ type IntAllocations =

 type DaySpanAllocation = Allocation DaySpan

-type PeriodScaler = Precision -> Double -> Decimal
+type EntryPair = (KeyEntry, KeyEntry)
+
+type PeriodScaler = Natural -> Double -> Double

 data FlatAllocation v = FlatAllocation
  { faValue :: !v
  , faDesc :: !T.Text
  , faTo :: !TaggedAcnt
+  , faCur :: !BudgetCurrency
  }
  deriving (Functor, Show)
--- a/lib/Internal/Database.hs
+++ b/lib/Internal/Database.hs
--- a/lib/Internal/History.hs
+++ b/lib/Internal/History.hs
@ -1,17 +1,15 @@
 module Internal.History
-  ( readHistStmt
-  , readHistTransfer
-  , splitHistory
-  , readHistoryCRUD
+  ( splitHistory
+  , insertHistTransfer
+  , readHistStmt
+  , insertHistStmt
  )
 where

 import Control.Monad.Except
 import Data.Csv
-import Data.Decimal
-import Data.Foldable
-import Data.Hashable
-import GHC.Real
+import Database.Persist.Monad
+import Internal.Database
 import Internal.Types.Main
 import Internal.Utils
 import RIO hiding (to)
@ -22,73 +20,107 @@ import qualified RIO.Map as M
 import qualified RIO.Text as T
 import RIO.Time
 import qualified RIO.Vector as V
-import Text.Regex.TDFA hiding (matchAll)

-readHistoryCRUD
-  :: (MonadUnliftIO m, MonadFinance m)
-  => FilePath
-  -> PreHistoryCRUD
-  -> m FinalHistoryCRUD
-readHistoryCRUD root o@CRUDOps {coCreate = (ts, ss)} = do
-  -- TODO multithread this for some extra fun :)
-
-  ss' <- mapErrorsIO (readHistStmt root) ss
-  fromEitherM $ runExceptT $ do
-    let sRes = mapErrors (ExceptT . return) ss'
-    let tRes = mapErrors readHistTransfer ts
-    combineError sRes tRes $ \ss'' ts' -> o {coCreate = concat ss'' ++ concat ts'}
-
-- NOTE keep statement and transfer readers separate because the former needs
-- the IO monad, and thus will throw IO errors rather than using the ExceptT
-- thingy
-splitHistory :: [History] -> ([PairedTransfer], [Statement])
+splitHistory :: [History] -> ([HistTransfer], [Statement])
 splitHistory = partitionEithers . fmap go
  where
    go (HistTransfer x) = Left x
    go (HistStatement x) = Right x

--------------------------------------------------------------------------------
-- Transfers
-
-readHistTransfer
-  :: (MonadAppError m, MonadFinance m)
-  => PairedTransfer
-  -> m [Tx CommitR]
-readHistTransfer ht = do
-  bounds <- asks (unHSpan . tsHistoryScope)
-  expandTransfer c bounds ht
-  where
-    c = CommitR (CommitHash $ hash ht) CTHistoryTransfer
-
--------------------------------------------------------------------------------
-- Statements
+insertHistTransfer
+  :: (MonadInsertError m, MonadSqlQuery m, MonadFinance m)
+  => HistTransfer
+  -> m ()
+insertHistTransfer
+  m@Transfer
+    { transFrom = from
+    , transTo = to
+    , transCurrency = u
+    , transAmounts = amts
+    } = do
+    whenHash CTManual m () $ \c -> do
+      bounds <- askDBState kmStatementInterval
+      let precRes = lookupCurrencyPrec u
+      let go Amount {amtWhen, amtValue, amtDesc} = do
+            let dayRes = liftExcept $ expandDatePat bounds amtWhen
+            (days, precision) <- combineError dayRes precRes (,)
+            let tx day = txPair day from to u (roundPrecision precision amtValue) amtDesc
+            keys <- combineErrors $ fmap tx days
+            mapM_ (insertTx c) keys
+      void $ combineErrors $ fmap go amts

 readHistStmt
  :: (MonadUnliftIO m, MonadFinance m)
  => FilePath
  -> Statement
-  -> m (Either AppException [Tx CommitR])
-readHistStmt root i = do
-  bounds <- asks (unHSpan . tsHistoryScope)
+  -> m (Maybe (CommitR, [KeyTx]))
+readHistStmt root i = whenHash_ CTImport i $ do
  bs <- readImport root i
-  return $ filter (inDaySpan bounds . txmDate . txMeta) . fmap go <$> bs
+  bounds <- askDBState kmStatementInterval
+  liftIOExceptT $ mapErrors resolveTx $ filter (inDaySpan bounds . txDate) bs
+
+insertHistStmt :: (MonadSqlQuery m) => CommitR -> [KeyTx] -> m ()
+insertHistStmt c ks = do
+  ck <- insert c
+  mapM_ (insertTx ck) ks
+
+--------------------------------------------------------------------------------
+-- low-level transaction stuff
+
+-- TODO tags here?
+txPair
+  :: (MonadInsertError m, MonadFinance m)
+  => Day
+  -> AcntID
+  -> AcntID
+  -> CurID
+  -> Rational
+  -> T.Text
+  -> m KeyTx
+txPair day from to cur val desc = resolveTx tx
  where
-    go t@Tx {txMeta = m} =
-      t {txMeta = m {txmCommit = CommitR (CommitHash $ hash i) CTHistoryStatement}}
+    split a v =
+      Entry
+        { eAcnt = a
+        , eValue = v
+        , eComment = ""
+        , eCurrency = cur
+        , eTags = []
+        }
+    tx =
+      Tx
+        { txDescr = desc
+        , txDate = day
+        , txEntries = [split from (-val), split to val]
+        }
+
+resolveTx :: (MonadInsertError m, MonadFinance m) => BalTx -> m KeyTx
+resolveTx t@Tx {txEntries = ss} =
+  fmap (\kss -> t {txEntries = kss}) $
+    combineErrors $
+      fmap resolveEntry ss
+
+insertTx :: MonadSqlQuery m => CommitRId -> KeyTx -> m ()
+insertTx c Tx {txDate = d, txDescr = e, txEntries = ss} = do
+  k <- insert $ TransactionR c d e
+  mapM_ (insertEntry k) ss
+
+--------------------------------------------------------------------------------
+-- Statements

 -- TODO this probably won't scale well (pipes?)
-readImport
-  :: (MonadUnliftIO m, MonadFinance m)
-  => FilePath
-  -> Statement
-  -> m (Either AppException [Tx ()])
+readImport :: (MonadUnliftIO m, MonadFinance m) => FilePath -> Statement -> m [BalTx]
 readImport root Statement {stmtTxOpts, stmtParsers, stmtSkipLines, stmtDelim, stmtPaths} = do
  let ores = compileOptions stmtTxOpts
  let cres = combineErrors $ compileMatch <$> stmtParsers
  (compiledOptions, compiledMatches) <- liftIOExcept $ combineError ores cres (,)
  let readStmt = readImport_ stmtSkipLines stmtDelim compiledOptions
  records <- L.sort . concat <$> mapErrorsIO readStmt paths
-  runExceptT (matchRecords compiledMatches records)
+  m <- askDBState kmCurrency
+  fromEither $
+    flip runReader m $
+      runExceptT $
+        matchRecords compiledMatches records
  where
    paths = (root </>) <$> stmtPaths

@ -101,9 +133,9 @@ readImport_
  -> m [TxRecord]
 readImport_ n delim tns p = do
  res <- tryIO $ BL.readFile p
-  bs <- fromEither $ first (AppException . (: []) . StatementIOError . tshow) res
+  bs <- fromEither $ first (InsertException . (: []) . InsertIOError . showT) res
  case decodeByNameWithP (parseTxRecord p tns) opts $ skip bs of
-    Left m -> throwIO $ AppException [ParseError $ T.pack m]
+    Left m -> throwIO $ InsertException [ParseError $ T.pack m]
    Right (_, v) -> return $ catMaybes $ V.toList v
  where
    opts = defaultDecodeOptions {decDelimiter = fromIntegral delim}
@ -112,93 +144,39 @@ readImport_ n delim tns p = do
 -- TODO handle this better, this maybe thing is a hack to skip lines with
 -- blank dates but will likely want to make this more flexible
 parseTxRecord :: FilePath -> TxOptsRe -> NamedRecord -> Parser (Maybe TxRecord)
-parseTxRecord
-  p
-  TxOpts
-    { toDate
-    , toDesc
-    , toAmount
-    , toOther
-    , toDateFmt
-    , toSkipBlankDate
-    , toSkipBlankAmount
-    , toSkipBlankDescription
-    , toSkipBlankOther
-    , toSkipMissingFields
-    }
-  r =
-    do
-      -- TODO this is confusing as hell
-      --
-      -- try and parse all fields; if a parse fails, either trip an error
-      -- or return a Nothing if we want to deliberately skip missing fields
-      d <- getField toDate
-      e <- getField toDesc
-      os <-
-        fmap M.fromList . sequence
-          <$> mapM (\n -> fmap (n,) <$> getField n) toOther
-      (af, ax) <- case toAmount of
-        -- the amount column is extra confusing because it can either be one
-        -- or two columns, so keep track of this with a maybe
-        AmountSingle TxAmount1 {a1Column, a1Fmt} -> do
-          f <- getField a1Column
-          return (a1Fmt, Right <$> f)
-        AmountDual TxAmount2 {a2Positive, a2Negative, a2Fmt} -> do
-          f1 <- getField a2Positive
-          f2 <- getField a2Negative
-          return $ (a2Fmt,) $ case (f1, f2) of
-            (Just a, Just b) -> Just $ Left (a, b)
-            _ -> Nothing
-      case (d, e, os, ax) of
-        -- If all lookups were successful, check that none of the fields are
-        -- blank, and if they are return nothing to skip this line
-        (Just d', Just e', Just os', Just ax') ->
-          if (toSkipBlankDate && d' == "")
-            || (toSkipBlankDescription && e' == "")
-            || (toSkipBlankAmount && (ax' == Right "" || ax' == Left ("", "")))
-            || elem "" (mapMaybe (`M.lookup` os') toSkipBlankOther)
+parseTxRecord p TxOpts {toDate, toAmountFmt, toDesc, toAmount, toOther, toDateFmt} r = do
+  d <- r .: T.encodeUtf8 toDate
+  if d == ""
    then return Nothing
-            else -- if we are skipping nothing, proceed to parse the date and amount
-            -- columns
-            do
-              a <- case ax' of
-                Right a -> parseDecimal True af a
-                Left ("", a) -> ((-1) *) <$> parseDecimal False af a
-                Left (a, _) -> parseDecimal False af a
-              d'' <- parseTimeM True defaultTimeLocale (T.unpack toDateFmt) d'
-              return $ Just $ TxRecord d'' a e' os' p
-        -- if no lookups succeeded, return nothing to skip this line. Note that
-        -- a parse fail will trigger a failure error further up, so that case
-        -- is already dealt with implicitly
-        _ -> return Nothing
-    where
-      getField :: FromField a => T.Text -> Parser (Maybe a)
-      getField f = case runParser $ r .: T.encodeUtf8 f of
-        Left err -> if toSkipMissingFields then return Nothing else fail err
-        Right x -> return $ Just x
+    else do
+      a <- parseRational toAmountFmt =<< r .: T.encodeUtf8 toAmount
+      e <- r .: T.encodeUtf8 toDesc
+      os <- M.fromList <$> mapM (\n -> (n,) <$> r .: T.encodeUtf8 n) toOther
+      d' <- parseTimeM True defaultTimeLocale (T.unpack toDateFmt) d
+      return $ Just $ TxRecord d' a e os p

-matchRecords :: MonadFinance m => [StatementParserRe] -> [TxRecord] -> AppExceptT m [Tx ()]
+matchRecords :: [MatchRe] -> [TxRecord] -> InsertExceptT CurrencyM [BalTx]
 matchRecords ms rs = do
  (matched, unmatched, notfound) <- matchAll (matchPriorities ms) rs
  case (matched, unmatched, notfound) of
-    (ms_, [], []) -> return ms_
-    (_, us, ns) -> throwError $ AppException [StatementError us ns]
+    (ms_, [], []) -> liftInner $ combineErrors $ fmap balanceTx ms_
+    (_, us, ns) -> throwError $ InsertException [StatementError us ns]

-matchPriorities :: [StatementParserRe] -> [MatchGroup]
+matchPriorities :: [MatchRe] -> [MatchGroup]
 matchPriorities =
  fmap matchToGroup
    . L.groupBy (\a b -> spPriority a == spPriority b)
    . L.sortOn (Down . spPriority)

-matchToGroup :: [StatementParserRe] -> MatchGroup
+matchToGroup :: [MatchRe] -> MatchGroup
 matchToGroup ms =
  uncurry MatchGroup $
    first (L.sortOn spDate) $
      L.partition (isJust . spDate) ms

 data MatchGroup = MatchGroup
-  { mgDate :: ![StatementParserRe]
-  , mgNoDate :: ![StatementParserRe]
+  { mgDate :: ![MatchRe]
+  , mgNoDate :: ![MatchRe]
  }
  deriving (Show)

@ -236,10 +214,9 @@ zipperSlice f x = go
        LT -> z

 zipperMatch
-  :: MonadFinance m
-  => Unzipped StatementParserRe
+  :: Unzipped MatchRe
  -> TxRecord
-  -> AppExceptT m (Zipped StatementParserRe, MatchRes (Tx ()))
+  -> InsertExceptT CurrencyM (Zipped MatchRe, MatchRes RawTx)
 zipperMatch (Unzipped bs cs as) x = go [] cs
  where
    go _ [] = return (Zipped bs $ cs ++ as, MatchFail)
@ -253,10 +230,9 @@ zipperMatch (Unzipped bs cs as) x = go [] cs
           in return (Zipped bs $ ps ++ ms' ++ as, skipOrPass)

 zipperMatch'
-  :: MonadFinance m
-  => Zipped StatementParserRe
+  :: Zipped MatchRe
  -> TxRecord
-  -> AppExceptT m (Zipped StatementParserRe, MatchRes (Tx ()))
+  -> InsertExceptT CurrencyM (Zipped MatchRe, MatchRes RawTx)
 zipperMatch' z x = go z
  where
    go (Zipped bs (a : as)) = do
@ -267,17 +243,13 @@ zipperMatch' z x = go z
          return (Zipped (maybe bs (: bs) $ matchDec a) as, skipOrPass)
    go z' = return (z', MatchFail)

-matchDec :: StatementParserRe -> Maybe StatementParserRe
+matchDec :: MatchRe -> Maybe MatchRe
 matchDec m = case spTimes m of
  Just 1 -> Nothing
  Just n -> Just $ m {spTimes = Just $ n - 1}
  Nothing -> Just m

-matchAll
-  :: MonadFinance m
-  => [MatchGroup]
-  -> [TxRecord]
-  -> AppExceptT m ([Tx ()], [TxRecord], [StatementParserRe])
+matchAll :: [MatchGroup] -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
 matchAll = go ([], [])
  where
    go (matched, unused) gs rs = case (gs, rs) of
@ -287,21 +259,13 @@ matchAll = go ([], [])
        (ts, unmatched, us) <- matchGroup g rs
        go (ts ++ matched, us ++ unused) gs' unmatched

-matchGroup
-  :: MonadFinance m
-  => MatchGroup
-  -> [TxRecord]
-  -> AppExceptT m ([Tx ()], [TxRecord], [StatementParserRe])
+matchGroup :: MatchGroup -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
 matchGroup MatchGroup {mgDate = ds, mgNoDate = ns} rs = do
  (md, rest, ud) <- matchDates ds rs
  (mn, unmatched, un) <- matchNonDates ns rest
  return (md ++ mn, unmatched, filter ((/= Nothing) . spTimes) $ ud ++ un)

-matchDates
-  :: MonadFinance m
-  => [StatementParserRe]
-  -> [TxRecord]
-  -> AppExceptT m ([Tx ()], [TxRecord], [StatementParserRe])
+matchDates :: [MatchRe] -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
 matchDates ms = go ([], [], initZipper ms)
  where
    go (matched, unmatched, z) [] =
@ -322,11 +286,7 @@ matchDates ms = go ([], [], initZipper ms)
          go (m, u, z') rs
    findDate m r = maybe EQ (`compareDate` trDate r) $ spDate m

-matchNonDates
-  :: MonadFinance m
-  => [StatementParserRe]
-  -> [TxRecord]
-  -> AppExceptT m ([Tx ()], [TxRecord], [StatementParserRe])
+matchNonDates :: [MatchRe] -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
 matchNonDates ms = go ([], [], initZipper ms)
  where
    go (matched, unmatched, z) [] =
@ -343,225 +303,26 @@ matchNonDates ms = go ([], [], initZipper ms)
            MatchFail -> (matched, r : unmatched)
       in go (m, u, resetZipper z') rs

-matches
-  :: MonadFinance m
-  => StatementParserRe
-  -> TxRecord
-  -> AppExceptT m (MatchRes (Tx ()))
-matches
-  StatementParser {spTx, spOther, spVal, spDate, spDesc, spPriority}
-  r@TxRecord {trDate, trAmount, trDesc, trOther} = do
-    res <- liftInner $
-      combineError3 val other desc $
-        \x y z -> x && y && z && date
-    if res
-      then maybe (return MatchSkip) convert spTx
-      else return MatchFail
+balanceTx :: RawTx -> InsertExcept BalTx
+balanceTx t@Tx {txEntries = ss} = do
+  bs <- balanceEntries ss
+  return $ t {txEntries = bs}
+
+balanceEntries :: [RawEntry] -> InsertExcept [BalEntry]
+balanceEntries ss =
+  fmap concat
+    <$> mapM (uncurry bal)
+    $ groupByKey
+    $ fmap (\s -> (eCurrency s, s)) ss
  where
-      val = valMatches spVal $ toRational trAmount
-      date = maybe True (`dateMatches` trDate) spDate
-      other = foldM (\a o -> (a &&) <$> otherMatches trOther o) True spOther
-      desc = maybe (return True) (matchMaybe (unTxDesc trDesc) . snd) spDesc
-      convert tg = MatchPass <$> toTx (fromIntegral spPriority) tg r
+    haeValue s@Entry {eValue = Just v} = Right s {eValue = v}
+    haeValue s = Left s
+    bal cur rss
+      | length rss < 2 = throwError $ InsertException [BalanceError TooFewEntries cur rss]
+      | otherwise = case partitionEithers $ fmap haeValue rss of
+          ([noVal], val) -> return $ noVal {eValue = foldr (\s x -> x - eValue s) 0 val} : val
+          ([], val) -> return val
+          _ -> throwError $ InsertException [BalanceError NotOneBlank cur rss]

-toTx :: MonadFinance m => Int -> TxGetter -> TxRecord -> AppExceptT m (Tx ())
-toTx
-  priority
-  TxGetter
-    { tgFrom
-    , tgTo
-    , tgCurrency
-    , tgOtherEntries
-    , tgScale
-    }
-  r@TxRecord {trAmount, trDate, trDesc} = do
-    combineError curRes subRes $ \(cur, f, t) ss ->
-      Tx
-        { txMeta = TxMeta trDate priority trDesc ()
-        , txPrimary =
-            Left $
-              EntrySet
-                { esTotalValue = roundToP (cpPrec cur) trAmount *. tgScale
-                , esCurrency = cpID cur
-                , esFrom = f
-                , esTo = t
-                }
-        , txOther = Left <$> ss
-        }
-    where
-      curRes = do
-        m <- asks tsCurrencyMap
-        cur <- liftInner $ resolveCurrency m r tgCurrency
-        let prec = cpPrec cur
-        let fromRes = liftInner $ resolveHalfEntry resolveFromValue prec r () tgFrom
-        let toRes = liftInner $ resolveHalfEntry resolveToValue prec r () tgTo
-        combineError fromRes toRes (cur,,)
-      subRes = mapErrors (resolveSubGetter r) tgOtherEntries
-
-resolveSubGetter
-  :: MonadFinance m
-  => TxRecord
-  -> TxSubGetter
-  -> AppExceptT m SecondayEntrySet
-resolveSubGetter r TxSubGetter {tsgFrom, tsgTo, tsgValue, tsgCurrency} = do
-  m <- asks tsCurrencyMap
-  cur <- liftInner $ resolveCurrency m r tsgCurrency
-  let prec = cpPrec cur
-  let toRes = resolveHalfEntry resolveToValue prec r () tsgTo
-  let valRes = liftInner $ resolveValue prec r tsgValue
-  liftInner $ combineErrorM toRes valRes $ \t v -> do
-    f <- resolveHalfEntry resolveFromValue prec r v tsgFrom
-    return $
-      EntrySet
-        { esTotalValue = ()
-        , esCurrency = cpID cur
-        , esFrom = f
-        , esTo = t
-        }
-
-resolveHalfEntry
-  :: (Precision -> TxRecord -> n -> AppExcept v')
-  -> Precision
-  -> TxRecord
-  -> v
-  -> TxHalfGetter (EntryGetter n)
-  -> AppExcept (HalfEntrySet v v')
-resolveHalfEntry f prec r v TxHalfGetter {thgAcnt, thgComment, thgTags, thgEntries} =
-  combineError acntRes esRes $ \a es ->
-    HalfEntrySet
-      { hesPrimary =
-          Entry
-            { eAcnt = a
-            , eValue = v
-            , eComment = thgComment
-            , eTags = thgTags
-            }
-      , hesOther = es
-      }
-  where
-    acntRes = resolveAcnt r thgAcnt
-    esRes = mapErrors (resolveEntry f prec r) thgEntries
-
-otherMatches :: M.Map T.Text T.Text -> FieldMatcherRe -> AppExcept Bool
-otherMatches dict m = case m of
-  Val (Field n mv) -> valMatches mv =<< (readRational =<< lookup_ MatchNumeric n)
-  Desc (Field n (_, md)) -> (`matchMaybe` md) =<< lookup_ MatchText n
-  where
-    lookup_ t n = lookupErr (MatchField t) n dict
-
-resolveEntry
-  :: (Precision -> TxRecord -> n -> AppExcept v)
-  -> Precision
-  -> TxRecord
-  -> EntryGetter n
-  -> AppExcept (Entry AcntID v TagID)
-resolveEntry f prec r s@Entry {eAcnt, eValue} =
-  combineError acntRes valRes $ \a v -> s {eAcnt = a, eValue = v}
-  where
-    acntRes = resolveAcnt r eAcnt
-    valRes = f prec r eValue
-
-resolveFromValue :: Precision -> TxRecord -> EntryNumGetter -> AppExcept EntryValue
-resolveFromValue = resolveValue
-
-resolveToValue :: Precision -> TxRecord -> LinkedEntryNumGetter -> AppExcept EntryLink
-resolveToValue _ _ (Linked l) = return $ LinkIndex l
-resolveToValue prec r (Getter g) = LinkValue <$> resolveValue prec r g
-
-resolveValue :: Precision -> TxRecord -> EntryNumGetter -> AppExcept EntryValue
-resolveValue prec TxRecord {trOther, trAmount} s = case s of
-  (LookupN t) -> EntryFixed . go <$> (readDouble =<< lookupErr EntryValField t trOther)
-  (ConstN c) -> return $ EntryFixed $ go c
-  AmountN m -> return $ EntryFixed $ trAmount *. m
-  BalanceN x -> return $ EntryBalance $ go x
-  PercentN x -> return $ EntryPercent x
-  where
-    go = realFracToDecimalP prec
-
-resolveAcnt :: TxRecord -> EntryAcnt -> AppExcept AcntID
-resolveAcnt r e = AcntID <$> resolveEntryField AcntField r (unAcntID <$> e)
-
-resolveCurrency :: CurrencyMap -> TxRecord -> EntryCur -> AppExcept CurrencyPrec
-resolveCurrency m r c = do
-  i <- resolveEntryField CurField r (unCurID <$> c)
-  case M.lookup (CurID i) m of
-    Just k -> return k
-    Nothing -> throwError $ AppException [LookupError (DBKey CurField) i]
-
-resolveEntryField :: EntryIDType -> TxRecord -> EntryTextGetter T.Text -> AppExcept T.Text
-resolveEntryField t TxRecord {trOther = o} s = case s of
-  ConstT p -> return p
-  LookupT f -> lookup_ f o
-  MapT (Field f m) -> do
-    k <- lookup_ f o
-    lookup_ k m
-  Map2T (Field (f1, f2) m) -> do
-    (k1, k2) <- combineError (lookup_ f1 o) (lookup_ f2 o) (,)
-    lookup_ (k1, k2) m
-  where
-    lookup_ :: (Ord k, Show k) => k -> M.Map k v -> AppExcept v
-    lookup_ = lookupErr (EntryIDField t)
-
-readDouble :: T.Text -> AppExcept Double
-readDouble s = case readMaybe $ T.unpack s of
-  Just x -> return x
-  Nothing -> throwError $ AppException [ConversionError s True]
-
-readRational :: T.Text -> AppExcept Rational
-readRational s = case T.split (== '.') s of
-  [x] -> maybe err (return . fromInteger) $ readT x
-  [x, y] -> case (readT x, readT y) of
-    (Just x', Just y') ->
-      let p = 10 ^ T.length y
-          k = if x' >= 0 then 1 else -1
-       in return $ fromInteger x' + k * y' % p
-    _ -> err
-  _ -> err
-  where
-    readT = readMaybe . T.unpack
-    err = throwError $ AppException [ConversionError s False]
-
-compileOptions :: TxOpts T.Text -> AppExcept TxOptsRe
-compileOptions = mapM (compileRegex True)
-
-- compileOptions o@TxOpts {toAmount = pat} = case pat of
--   AmountSingle (TxAmount1 {a1Fmt}) -> do
--     re <- compileRegex True a1Fmt
--     return $ o {toAmountFmt = re}
--   AmountDual (TxAmount2 {a2Fmt}) -> do
--     re <- compileRegex True a2Fmt
--     return $ o {toAmountFmt = re}
-
-compileMatch :: StatementParser T.Text -> AppExcept StatementParserRe
-compileMatch m@StatementParser {spDesc, spOther} = do
-  combineError dres ores $ \d os -> m {spDesc = d, spOther = os}
-  where
-    go = compileRegex False
-    dres = mapM go spDesc
-    ores = combineErrors $ fmap (mapM go) spOther
-
-parseDecimal :: MonadFail m => Bool -> (T.Text, Regex) -> T.Text -> m Decimal
-parseDecimal wantSign (pat, re) s = case (wantSign, matchGroupsMaybe s re) of
-  (True, [sign, num]) -> do
-    k <- readSign sign
-    x <- readNum num
-    return $ k * x
-  (False, [num]) -> readNum num
-  _ -> msg "malformed decimal"
-  where
-    msg :: MonadFail m => T.Text -> m a
-    msg m =
-      fail $
-        T.unpack $
-          T.unwords [m, "-", keyVals [("pattern", pat), ("query", s)]]
-    readSign x
-      | x == "-" = return (-1)
-      | x == "+" || x == "" = return 1
-      | otherwise = msg $ T.append "invalid sign: " x
-    readNum x =
-      maybe
-        (msg $ T.unwords ["could not parse", singleQuote x])
-        return
-        $ readMaybe
-        $ T.unpack
-        $ T.filter (/= ',') x
+groupByKey :: Ord k => [(k, v)] -> [(k, [v])]
+groupByKey = M.toList . M.fromListWith (++) . fmap (second (: []))
--- a/lib/Internal/Types/Database.hs
+++ b/lib/Internal/Types/Database.hs
@ -7,12 +7,9 @@
 -- | Types corresponding to the database model
 module Internal.Types.Database where

-import Data.Csv (FromField)
 import Database.Persist.Sql hiding (Desc, In, Statement)
 import Database.Persist.TH
-import Internal.Types.Dhall
 import RIO
-import qualified RIO.NonEmpty as NE
 import qualified RIO.Text as T
 import RIO.Time

@ -20,106 +17,51 @@ share
  [mkPersist sqlSettings, mkMigrate "migrateAll"]
  [persistLowerCase|
 CommitR sql=commits
-    hash CommitHash
+    hash Int
    type ConfigType
-    UniqueCommitHash hash
-    deriving Show Eq Ord
-
-ConfigStateR sql=config_state
-    historySpan HistorySpan
-    budgetSpan BudgetSpan
-    deriving Show
-
+    deriving Show Eq
 CurrencyR sql=currencies
-    symbol CurID
+    symbol T.Text
    fullname T.Text
-    precision Precision
-    UniqueCurrencySymbol symbol
-    UniqueCurrencyFullname fullname
-    deriving Show Eq Ord
-
+    precision Int
+    deriving Show Eq
 TagR sql=tags
-    symbol TagID
+    symbol T.Text
    fullname T.Text
-    UniqueTagSymbol symbol
-    UniqueTagFullname fullname
-    deriving Show Eq Ord
-
+    deriving Show Eq
 AccountR sql=accounts
    name T.Text
-    fullpath AcntPath
+    fullpath T.Text
    desc T.Text
-    sign AcntSign
-    leaf Bool
-    UniqueAccountFullpath fullpath
-    deriving Show Eq Ord
-
+    deriving Show Eq
 AccountPathR sql=account_paths
-    parent AccountRId 
-    child AccountRId 
+    parent AccountRId OnDeleteCascade
+    child AccountRId OnDeleteCascade
    depth Int
-    deriving Show Eq Ord
-
+    deriving Show Eq
 TransactionR sql=transactions
-    commit CommitRId 
+    commit CommitRId OnDeleteCascade
    date Day
-    budgetName BudgetName
-    description TxDesc
-    priority Int
+    description T.Text
    deriving Show Eq
-
-EntrySetR sql=entry_sets
-    transaction TransactionRId 
-    currency CurrencyRId 
-    index EntrySetIndex
-    rebalance Bool
-    deriving Show Eq
-
 EntryR sql=entries
-    entryset EntrySetRId  
-    account AccountRId 
+    transaction TransactionRId OnDeleteCascade
+    currency CurrencyRId OnDeleteCascade
+    account AccountRId OnDeleteCascade
    memo T.Text
    value Rational
-    index EntryIndex
-    cachedValue (Maybe Rational)
-    cachedType (Maybe TransferType)
-    cachedLink (Maybe EntryIndex)
    deriving Show Eq
-
 TagRelationR sql=tag_relations
-    entry EntryRId 
-    tag TagRId
+    entry EntryRId OnDeleteCascade
+    tag TagRId OnDeleteCascade
+BudgetLabelR sql=budget_labels
+    entry EntryRId OnDeleteCascade
+    budgetName T.Text
    deriving Show Eq
 |]

-newtype TxIndex = TxIndex {unTxIndex :: Int}
-  deriving newtype (Show, Eq, Ord, Num, Real, Enum, Integral, PersistField, PersistFieldSql)
-
-newtype EntrySetIndex = EntrySetIndex {unEntrySetIndex :: Int}
-  deriving newtype (Show, Eq, Ord, Num, Real, Enum, Integral, PersistField, PersistFieldSql)
-
-newtype EntryIndex = EntryIndex {unEntryIndex :: Int}
-  deriving newtype (Show, Eq, Ord, Num, Real, Enum, Integral, PersistField, PersistFieldSql)
-
-newtype TxDesc = TxDesc {unTxDesc :: T.Text}
-  deriving newtype (Show, Eq, Ord, PersistField, PersistFieldSql, FromField, IsString)
-
-newtype Precision = Precision {unPrecision :: Word8}
-  deriving newtype (Eq, Ord, Num, Show, Real, Enum, Integral, PersistField, PersistFieldSql)
-
-type DaySpan = (Day, Int)
-
-newtype CommitHash = CommitHash {unCommitHash :: Int}
-  deriving newtype (Show, Eq, Num, Ord, PersistField, PersistFieldSql)
-
-newtype BudgetSpan = BudgetSpan {unBSpan :: DaySpan}
-  deriving newtype (Show, Eq, PersistField, PersistFieldSql)
-
-newtype HistorySpan = HistorySpan {unHSpan :: DaySpan}
-  deriving newtype (Show, Eq, PersistField, PersistFieldSql)
-
-data ConfigType = CTBudget | CTHistoryTransfer | CTHistoryStatement
-  deriving (Eq, Show, Read, Enum, Ord)
+data ConfigType = CTBudget | CTManual | CTImport
+  deriving (Eq, Show, Read, Enum)

 instance PersistFieldSql ConfigType where
  sqlType _ = SqlString
@ -127,61 +69,7 @@ instance PersistFieldSql ConfigType where
 instance PersistField ConfigType where
  toPersistValue = PersistText . T.pack . show

+  -- TODO these error messages *might* be good enough?
  fromPersistValue (PersistText v) =
    maybe (Left $ "could not parse: " <> v) Right $ readMaybe $ T.unpack v
-  fromPersistValue _ = Left "not a string"
-
-data AcntSign = Credit | Debit
-  deriving (Show, Eq, Ord)
-
-instance PersistFieldSql AcntSign where
-  sqlType _ = SqlInt64
-
-instance PersistField AcntSign where
-  toPersistValue Debit = PersistInt64 1
-  toPersistValue Credit = PersistInt64 (-1)
-
-  fromPersistValue (PersistInt64 1) = Right Debit
-  fromPersistValue (PersistInt64 (-1)) = Right Credit
-  fromPersistValue (PersistInt64 v) = Left $ "could not convert to account sign: " <> tshow v
-  fromPersistValue _ = Left "not an Int64"
-
-data AcntType
-  = AssetT
-  | EquityT
-  | ExpenseT
-  | IncomeT
-  | LiabilityT
-  deriving (Show, Eq, Ord, Hashable, Generic, Read)
-
-atName :: AcntType -> T.Text
-atName AssetT = "asset"
-atName EquityT = "equity"
-atName ExpenseT = "expense"
-atName IncomeT = "income"
-atName LiabilityT = "liability"
-
-data AcntPath = AcntPath
-  { apType :: !AcntType
-  , apChildren :: ![T.Text]
-  }
-  deriving (Eq, Ord, Show, Hashable, Generic, Read)
-
-acntPath2Text :: AcntPath -> T.Text
-acntPath2Text = T.intercalate "/" . NE.toList . acntPath2NonEmpty
-
-acntPath2NonEmpty :: AcntPath -> NonEmpty T.Text
-acntPath2NonEmpty (AcntPath t cs) = atName t :| cs
-
-instance PersistFieldSql AcntPath where
-  sqlType _ = SqlString
-
-instance PersistField AcntPath where
-  toPersistValue = PersistText . acntPath2Text
-
-  fromPersistValue (PersistText v) = case T.split (== '/') v of
-    [] -> Left "path is empty"
-    (x : xs) -> case readMaybe $ T.unpack x of
-      Just t -> Right $ AcntPath t xs
-      _ -> Left "could not get account type"
-  fromPersistValue _ = Left "not a string"
+  fromPersistValue _ = Left "wrong type"
--- a/lib/Internal/Types/Dhall.hs
+++ b/lib/Internal/Types/Dhall.hs
@ -19,9 +19,9 @@ import Language.Haskell.TH.Syntax (Lift)
 import RIO
 import qualified RIO.Map as M
 import qualified RIO.Text as T
+import RIO.Time
 import Text.Regex.TDFA

-- TODO find a way to conventiently make TaggedAcnt use my newtypes
 makeHaskellTypesWith
  (defaultGenerateOptions {generateToDhallInstance = False, generateFromDhallInstance = False})
  [ MultipleConstructors "SqlConfig" "(./dhall/Types.dhall).SqlConfig"
@ -33,14 +33,13 @@ makeHaskellTypesWith
  , MultipleConstructors "YMDMatcher" "(./dhall/Types.dhall).YMDMatcher"
  , MultipleConstructors "DateMatcher" "(./dhall/Types.dhall).DateMatcher"
  , MultipleConstructors "EntryNumGetter" "(./dhall/Types.dhall).EntryNumGetter"
-  , MultipleConstructors "LinkedEntryNumGetter" "(./dhall/Types.dhall).LinkedEntryNumGetter"
-  , MultipleConstructors "TransferType" "(./dhall/Types.dhall).TransferType"
+  , MultipleConstructors "BudgetCurrency" "(./dhall/Types.dhall).BudgetCurrency"
+  , MultipleConstructors "BudgetTransferType" "(./dhall/Types.dhall).BudgetTransferType"
  , MultipleConstructors "TaxMethod" "(./dhall/Types.dhall).TaxMethod"
  , MultipleConstructors "PeriodType" "(./dhall/Types.dhall).PeriodType"
-  , SingleConstructor "LinkedNumGetter" "LinkedNumGetter" "(./dhall/Types.dhall).LinkedNumGetter.Type"
  , SingleConstructor "Currency" "Currency" "(./dhall/Types.dhall).Currency"
  , SingleConstructor "Tag" "Tag" "(./dhall/Types.dhall).Tag"
-  , SingleConstructor "TaggedAcnt" "TaggedAcnt" "(./dhall/Types.dhall).TaggedAcnt.Type"
+  , SingleConstructor "TaggedAcnt" "TaggedAcnt" "(./dhall/Types.dhall).TaggedAcnt"
  , SingleConstructor "Gregorian" "Gregorian" "(./dhall/Types.dhall).Gregorian"
  , SingleConstructor "GregorianM" "GregorianM" "(./dhall/Types.dhall).GregorianM"
  , SingleConstructor "Interval" "Interval" "(./dhall/Types.dhall).Interval"
@ -49,16 +48,12 @@ makeHaskellTypesWith
  , SingleConstructor "ModPat" "ModPat" "(./dhall/Types.dhall).ModPat.Type"
  , SingleConstructor "CronPat" "CronPat" "(./dhall/Types.dhall).CronPat.Type"
  , SingleConstructor "ValMatcher" "ValMatcher" "(./dhall/Types.dhall).ValMatcher.Type"
-  , SingleConstructor "TxAmount1" "TxAmount1" "(./dhall/Types.dhall).TxAmount1_"
-  , SingleConstructor "TxAmount2" "TxAmount2" "(./dhall/Types.dhall).TxAmount2_"
-  , SingleConstructor
-      "Amount"
-      "Amount"
-      "\\(w : Type) -> \\(v : Type) -> ((./dhall/Types.dhall).Amount w v).Type"
-  , SingleConstructor
-      "AcntMatcher_"
-      "AcntMatcher_"
-      "\\(re : Type) -> ((./dhall/Types.dhall).AcntMatcher_ re).Type"
+  , SingleConstructor "Amount" "Amount" "(./dhall/Types.dhall).Amount"
+  , SingleConstructor "AcntSet" "AcntSet" "(./dhall/Types.dhall).AcntSet.Type"
+  , SingleConstructor "TransferMatcher" "TransferMatcher" "(./dhall/Types.dhall).TransferMatcher.Type"
+  , SingleConstructor "ShadowTransfer" "ShadowTransfer" "(./dhall/Types.dhall).ShadowTransfer"
+  , -- , SingleConstructor "Income" "Income" "(./dhall/Types.dhall).Income.Type"
+    SingleConstructor "Exchange" "Exchange" "(./dhall/Types.dhall).Exchange"
  , SingleConstructor "Field" "Field" "(./dhall/Types.dhall).Field"
  , SingleConstructor "Entry" "Entry" "(./dhall/Types.dhall).Entry"
  , SingleConstructor "PretaxValue" "PretaxValue" "(./dhall/Types.dhall).PretaxValue"
@ -66,9 +61,14 @@ makeHaskellTypesWith
  , SingleConstructor "TaxProgression" "TaxProgression" "(./dhall/Types.dhall).TaxProgression"
  , SingleConstructor "TaxValue" "TaxValue" "(./dhall/Types.dhall).TaxValue"
  , SingleConstructor "PosttaxValue" "PosttaxValue" "(./dhall/Types.dhall).PosttaxValue"
-  , SingleConstructor "TransferValue" "TransferValue" "(./dhall/Types.dhall).TransferValue.Type"
+  , SingleConstructor "BudgetTransferValue" "BudgetTransferValue" "(./dhall/Types.dhall).BudgetTransferValue"
  , SingleConstructor "Period" "Period" "(./dhall/Types.dhall).Period"
  , SingleConstructor "HourlyPeriod" "HourlyPeriod" "(./dhall/Types.dhall).HourlyPeriod"
+  -- , SingleConstructor "ToTx" "ToTx" "(./dhall/Types.dhall).ToTx"
+  -- , SingleConstructor "FieldMatcher" "FieldMatcher" "(./dhall/Types.dhall).FieldMatcher_"
+  -- , SingleConstructor "Match" "Match" "(./dhall/Types.dhall).Match_"
+  -- , SingleConstructor "Budget" "Budget" "(./dhall/Types.dhall).Budget"
+  -- SingleConstructor "Transfer" "Transfer" "(./dhall/Types.dhall).Transfer"
  ]

 deriveProduct
@ -87,13 +87,17 @@ deriveProduct
  , "CronPat"
  , "DatePat"
  , "TaggedAcnt"
+  , "Budget"
  , "Income"
+  , "ShadowTransfer"
+  , "TransferMatcher"
+  , "AcntSet"
  , "DateMatcher"
  , "ValMatcher"
  , "YMDMatcher"
+  , "BudgetCurrency"
+  , "Exchange"
  , "EntryNumGetter"
-  , "LinkedNumGetter"
-  , "LinkedEntryNumGetter"
  , "TemporalScope"
  , "SqlConfig"
  , "PretaxValue"
@ -102,8 +106,8 @@ deriveProduct
  , "TaxProgression"
  , "TaxMethod"
  , "PosttaxValue"
-  , "TransferValue"
-  , "TransferType"
+  , "BudgetTransferValue"
+  , "BudgetTransferType"
  , "Period"
  , "PeriodType"
  , "HourlyPeriod"
@ -174,45 +178,25 @@ deriving instance Ord DatePat

 deriving instance Hashable DatePat

-type PairedTransfer = Transfer TaggedAcnt CurID DatePat TransferValue
+type BudgetTransfer =
+  Transfer TaggedAcnt BudgetCurrency DatePat BudgetTransferValue

-deriving instance Hashable PairedTransfer
+deriving instance Hashable BudgetTransfer

-deriving instance Generic PairedTransfer
+deriving instance Generic BudgetTransfer

-deriving instance FromDhall PairedTransfer
-
-newtype BudgetName = BudgetName {unBudgetName :: T.Text}
-  deriving newtype (Show, Eq, Ord, Hashable, FromDhall, PersistField, PersistFieldSql)
+deriving instance FromDhall BudgetTransfer

 data Budget = Budget
-  { bgtLabel :: !BudgetName
-  , bgtIncomes :: ![Income]
-  , bgtPretax :: ![MultiAllocation PretaxValue]
-  , bgtTax :: ![MultiAllocation TaxValue]
-  , bgtPosttax :: ![MultiAllocation PosttaxValue]
-  , bgtTransfers :: ![PairedTransfer]
-  , bgtShadowTransfers :: ![ShadowTransfer]
+  { bgtLabel :: Text
+  , bgtIncomes :: [Income]
+  , bgtPretax :: [MultiAllocation PretaxValue]
+  , bgtTax :: [MultiAllocation TaxValue]
+  , bgtPosttax :: [MultiAllocation PosttaxValue]
+  , bgtTransfers :: [BudgetTransfer]
+  , bgtShadowTransfers :: [ShadowTransfer]
  , bgtInterval :: !(Maybe Interval)
  }
-  deriving (Generic, Hashable, FromDhall)
-
-data ShadowTransfer = ShadowTransfer
-  { stFrom :: !TaggedAcnt
-  , stTo :: !TaggedAcnt
-  , stCurrency :: !CurID
-  , stDesc :: !Text
-  , stMatch :: !(TransferMatcher_ Text)
-  , stRatio :: !Double
-  }
-  deriving (Generic, Hashable, FromDhall)
-
-data TransferMatcher_ re = TransferMatcher_
-  { tmFrom :: !(Maybe (AcntMatcher_ re))
-  , tmTo :: !(Maybe (AcntMatcher_ re))
-  , tmDate :: !(Maybe DateMatcher)
-  , tmVal :: !ValMatcher
-  }

 deriving instance Hashable PretaxValue

@ -226,28 +210,17 @@ deriving instance Hashable TaxValue

 deriving instance Hashable PosttaxValue

-deriving instance Hashable TransferValue
+deriving instance Hashable Budget

-deriving instance Hashable TransferType
+deriving instance Hashable BudgetTransferValue

-deriving instance Read TransferType
-
-instance PersistFieldSql TransferType where
-  sqlType _ = SqlString
-
-instance PersistField TransferType where
-  toPersistValue = PersistText . T.pack . show
-
-  fromPersistValue (PersistText v) =
-    maybe (Left $ "could not parse: " <> v) Right $ readMaybe $ T.unpack v
-  fromPersistValue _ = Left "wrong type"
+deriving instance Hashable BudgetTransferType

 deriving instance Hashable TaggedAcnt

 deriving instance Ord TaggedAcnt

-newtype CurID = CurID {unCurID :: T.Text}
-  deriving newtype (Eq, Show, Ord, Hashable, FromDhall, PersistField, PersistFieldSql)
+type CurID = T.Text

 data Income = Income
  { incGross :: Double
@ -259,7 +232,6 @@ data Income = Income
  , incFrom :: TaggedAcnt
  , incToBal :: TaggedAcnt
  , incPayPeriod :: !Period
-  , incPriority :: !Int
  }

 deriving instance Hashable HourlyPeriod
@ -278,13 +250,20 @@ deriving instance (FromDhall v, FromDhall w) => FromDhall (Amount w v)

 deriving instance (Hashable v, Hashable w) => Hashable (Amount w v)

+-- deriving instance (Generic w, Generic v, FromDhall w, FromDhall v) => FromDhall (Amount w v)
+
 deriving instance (Show w, Show v) => Show (Amount w v)

 deriving instance (Eq w, Eq v) => Eq (Amount w v)

+deriving instance Hashable Exchange
+
+deriving instance Hashable BudgetCurrency
+
 data Allocation w v = Allocation
  { alloTo :: TaggedAcnt
  , alloAmts :: [Amount w v]
+  , alloCur :: CurID
  }
  deriving (Eq, Show, Generic, Hashable)

@ -325,17 +304,11 @@ data Transfer a c w v = Transfer
  }
  deriving (Eq, Show)

-deriving instance Generic (TransferMatcher_ Text)
+deriving instance Hashable ShadowTransfer

-deriving instance Hashable (TransferMatcher_ Text)
+deriving instance Hashable AcntSet

-deriving instance FromDhall (TransferMatcher_ Text)
-
-deriving instance Generic (AcntMatcher_ Text)
-
-deriving instance Hashable (AcntMatcher_ Text)
-
-deriving instance FromDhall (AcntMatcher_ Text)
+deriving instance Hashable TransferMatcher

 deriving instance Hashable ValMatcher

@ -367,10 +340,6 @@ instance Ord DateMatcher where

 deriving instance Hashable EntryNumGetter

-deriving instance Hashable LinkedNumGetter
-
-deriving instance Hashable LinkedEntryNumGetter
-
 -------------------------------------------------------------------------------
 -- top level type with fixed account tree to unroll the recursion in the dhall
 -- account tree type
@ -393,7 +362,7 @@ data AccountRoot_ a = AccountRoot_
  , arIncome :: ![a]
  , arLiabilities :: ![a]
  }
-  deriving (Generic, Hashable)
+  deriving (Generic)

 type AccountRootF = AccountRoot_ (Fix AccountTreeF)

@ -402,8 +371,10 @@ deriving instance FromDhall AccountRootF
 type AccountRoot = AccountRoot_ AccountTree

 data Config_ a = Config_
-  { scope :: !TemporalScope
+  { global :: !TemporalScope
+  , budget :: ![Budget]
  , currencies :: ![Currency]
+  , statements :: ![History]
  , accounts :: !a
  , tags :: ![Tag]
  , sqlConfig :: !SqlConfig
@ -433,76 +404,55 @@ instance FromDhall a => FromDhall (Config_ a)
 -- dhall type overrides (since dhall can't import types with parameters...yet)

 -- TODO newtypes for these?
-newtype AcntID = AcntID {unAcntID :: T.Text}
-  deriving newtype (Eq, Show, Ord, Hashable, FromDhall, PersistField, PersistFieldSql)
+type AcntID = T.Text

-newtype TagID = TagID {unTagID :: T.Text}
-  deriving newtype (Eq, Show, Ord, Hashable, FromDhall, PersistField, PersistFieldSql)
+type TagID = T.Text
+
+type HistTransfer = Transfer AcntID CurID DatePat Double
+
+deriving instance Generic HistTransfer
+
+deriving instance Hashable HistTransfer
+
+deriving instance FromDhall HistTransfer

 data History
-  = HistTransfer !PairedTransfer
+  = HistTransfer !HistTransfer
  | HistStatement !Statement
  deriving (Eq, Generic, Hashable, FromDhall)

-type EntryGetter n = Entry EntryAcnt n TagID
+type EntryGetter = Entry EntryAcnt (Maybe EntryNumGetter) EntryCur TagID

-type FromEntryGetter = EntryGetter EntryNumGetter
+instance FromDhall EntryGetter

-type ToEntryGetter = EntryGetter LinkedEntryNumGetter
+deriving instance (Show a, Show c, Show v, Show t) => Show (Entry a v c t)

-instance FromDhall FromEntryGetter
+deriving instance Generic (Entry a v c t)

-instance FromDhall ToEntryGetter
+deriving instance (Hashable a, Hashable v, Hashable c, Hashable t) => Hashable (Entry a v c t)

-deriving instance (Show a, Show v, Show t) => Show (Entry a v t)
+deriving instance (Eq a, Eq v, Eq c, Eq t) => Eq (Entry a v c t)

-deriving instance Generic (Entry a v t)
+data Tx s = Tx
+  { txDescr :: !T.Text
+  , txDate :: !Day
+  , txEntries :: ![s]
+  }
+  deriving (Generic)

-deriving instance (Hashable a, Hashable v, Hashable t) => Hashable (Entry a v t)
+type ExpTx = Tx EntryGetter

-deriving instance (Eq a, Eq v, Eq t) => Eq (Entry a v t)
+instance FromDhall ExpTx

-deriving instance Eq a => Eq (TxOpts a)
-
-deriving instance Generic (TxOpts a)
-
-deriving instance Hashable (TxOpts T.Text)
-
-deriving instance FromDhall (TxOpts T.Text)
-
-deriving instance Show a => Show (TxOpts a)
-
-deriving instance Eq re => Eq (TxAmount1 re)
-
-deriving instance Eq re => Eq (TxAmount2 re)
-
-deriving instance Show re => Show (TxAmount1 re)
-
-deriving instance Show re => Show (TxAmount2 re)
-
-deriving instance Generic (TxAmount1 T.Text)
-
-deriving instance Generic (TxAmount2 T.Text)
-
-deriving instance Hashable (TxAmount1 T.Text)
-
-deriving instance Hashable (TxAmount2 T.Text)
-
-deriving instance FromDhall (TxAmount1 T.Text)
-
-deriving instance FromDhall (TxAmount2 T.Text)
-
-deriving instance Functor TxAmount1
-
-deriving instance Functor TxAmount2
-
-deriving instance Foldable TxAmount1
-
-deriving instance Foldable TxAmount2
-
-deriving instance Traversable TxAmount1
-
-deriving instance Traversable TxAmount2
+data TxOpts re = TxOpts
+  { toDate :: !T.Text
+  , toAmount :: !T.Text
+  , toDesc :: !T.Text
+  , toOther :: ![T.Text]
+  , toDateFmt :: !T.Text
+  , toAmountFmt :: !re
+  }
+  deriving (Eq, Generic, Hashable, Show, FromDhall)

 data Statement = Statement
  { stmtPaths :: ![FilePath]
@ -511,30 +461,7 @@ data Statement = Statement
  , stmtTxOpts :: !(TxOpts T.Text)
  , stmtSkipLines :: !Natural
  }
-  deriving (Eq, Hashable, Generic, FromDhall, Show)
-
-data TxAmountSpec re = AmountSingle (TxAmount1 re) | AmountDual (TxAmount2 re)
-  deriving (Eq, Show, Functor, Foldable, Traversable)
-
-deriving instance Generic (TxAmountSpec T.Text)
-
-deriving instance FromDhall (TxAmountSpec T.Text)
-
-deriving instance Hashable (TxAmountSpec T.Text)
-
-data TxOpts re = TxOpts
-  { toDate :: !T.Text
-  , toAmount :: !(TxAmountSpec re)
-  , toDesc :: !T.Text
-  , toOther :: ![T.Text]
-  , toDateFmt :: !T.Text
-  , toSkipBlankDate :: !Bool
-  , toSkipBlankAmount :: !Bool
-  , toSkipBlankDescription :: !Bool
-  , toSkipBlankOther :: ![Text]
-  , toSkipMissingFields :: !Bool
-  }
-  deriving (Functor, Foldable, Traversable)
+  deriving (Eq, Hashable, Generic, FromDhall)

 -- | the value of a field in entry (text version)
 -- can either be a raw (constant) value, a lookup from the record, or a map
@ -544,7 +471,7 @@ data EntryTextGetter t
  | LookupT !T.Text
  | MapT !(FieldMap T.Text t)
  | Map2T !(FieldMap (T.Text, T.Text) t)
-  deriving (Eq, Generic, Hashable, Show, FromDhall, Functor)
+  deriving (Eq, Generic, Hashable, Show, FromDhall)

 type EntryCur = EntryTextGetter CurID

@ -576,32 +503,10 @@ data FieldMatcher re

 deriving instance Show (FieldMatcher T.Text)

-data TxHalfGetter e = TxHalfGetter
-  { thgAcnt :: !EntryAcnt
-  , thgComment :: !T.Text
-  , thgTags :: ![TagID]
-  , thgEntries :: ![e]
-  }
-  deriving (Eq, Generic, Hashable, Show)
-
-deriving instance FromDhall (TxHalfGetter FromEntryGetter)
-
-deriving instance FromDhall (TxHalfGetter ToEntryGetter)
-
-data TxSubGetter = TxSubGetter
-  { tsgFrom :: !(TxHalfGetter FromEntryGetter)
-  , tsgTo :: !(TxHalfGetter ToEntryGetter)
-  , tsgValue :: !EntryNumGetter
-  , tsgCurrency :: !EntryCur
-  }
-  deriving (Eq, Generic, Hashable, Show, FromDhall)
-
 data TxGetter = TxGetter
-  { tgFrom :: !(TxHalfGetter FromEntryGetter)
-  , tgTo :: !(TxHalfGetter ToEntryGetter)
-  , tgCurrency :: !EntryCur
-  , tgOtherEntries :: ![TxSubGetter]
-  , tgScale :: !Double
+  { tgCurrency :: !EntryCur
+  , tgAcnt :: !EntryAcnt
+  , tgEntries :: ![EntryGetter]
  }
  deriving (Eq, Generic, Hashable, Show, FromDhall)

--- a/lib/Internal/Types/Main.hs
+++ b/lib/Internal/Types/Main.hs
@ -1,3 +1,4 @@
+{-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DerivingVia #-}
 {-# LANGUAGE UndecidableInstances #-}

@ -11,11 +12,11 @@ module Internal.Types.Main
 where

 import Control.Monad.Except
-import Data.Decimal
 import Database.Persist.Sql hiding (Desc, In, Statement)
 import Dhall hiding (embed, maybe)
 import Internal.Types.Database
 import Internal.Types.Dhall
+import Language.Haskell.TH.Syntax (Lift)
 import RIO
 import qualified RIO.Map as M
 import qualified RIO.NonEmpty as NE
@ -26,166 +27,99 @@ import Text.Regex.TDFA
 --------------------------------------------------------------------------------
 -- database cache types

-type MonadFinance = MonadReader TxState
-
-data DeleteTxs = DeleteTxs
-  { dtCommits :: ![CommitRId]
-  , dtTxs :: ![TransactionRId]
-  , dtEntrySets :: ![EntrySetRId]
-  , dtEntries :: ![EntryRId]
-  , dtTagRelations :: ![TagRelationRId]
-  }
-  deriving (Show)
-
-type EntityCRUDOps r = CRUDOps [Entity r] () () [Key r]
-
-data MetaCRUD = MetaCRUD
-  { mcCurrencies :: !(EntityCRUDOps CurrencyR)
-  , mcAccounts :: !(EntityCRUDOps AccountR)
-  , mcPaths :: !(EntityCRUDOps AccountPathR)
-  , mcTags :: !(EntityCRUDOps TagR)
-  , mcBudgetScope :: !BudgetSpan
-  , mcHistoryScope :: !HistorySpan
+data ConfigHashes = ConfigHashes
+  { chIncome :: ![Int]
+  , chExpense :: ![Int]
+  , chManual :: ![Int]
+  , chImport :: ![Int]
  }

-type BudgetCRUDOps b = CRUDOps [b] () () DeleteTxs
+type AccountMap = M.Map AcntID (AccountRId, AcntSign, AcntType)

-type PreBudgetCRUD = BudgetCRUDOps Budget
-
-type FinalBudgetCRUD = BudgetCRUDOps (BudgetName, [Tx CommitR])
-
-type HistoryCRUDOps h =
-  CRUDOps
-    h
-    [ReadEntry]
-    [Either TotalUpdateEntrySet FullUpdateEntrySet]
-    DeleteTxs
-
-type PreHistoryCRUD = HistoryCRUDOps ([PairedTransfer], [Statement])
-
-type FinalHistoryCRUD = HistoryCRUDOps [Tx CommitR]
-
-data TxState = TxState
-  { tsAccountMap :: !AccountMap
-  , tsCurrencyMap :: !CurrencyMap
-  , tsTagMap :: !TagMap
-  , tsBudgetScope :: !BudgetSpan
-  , tsHistoryScope :: !HistorySpan
-  }
-  deriving (Show)
-
-data ExistingConfig = ExistingConfig
-  { ecAccounts :: !(Set AccountRId)
-  , ecTags :: !(Set TagRId)
-  , ecCurrencies :: !(Set CurrencyRId)
-  }
-
-type AccountMap = M.Map AcntID (AccountRId, AcntType)
-
-data CurrencyPrec = CurrencyPrec {cpID :: !CurrencyRId, cpPrec :: !Precision}
-  deriving (Show)
-
-type CurrencyMap = M.Map CurID CurrencyPrec
+type CurrencyMap = M.Map CurID (CurrencyRId, Natural)

 type TagMap = M.Map TagID TagRId

-data CRUDOps c r u d = CRUDOps
-  { coCreate :: !c
-  , coRead :: !r
-  , coUpdate :: !u
-  , coDelete :: !d
+data DBState = DBState
+  { kmCurrency :: !CurrencyMap
+  , kmAccount :: !AccountMap
+  , kmTag :: !TagMap
+  , kmBudgetInterval :: !DaySpan
+  , kmStatementInterval :: !DaySpan
+  , kmNewCommits :: ![Int]
  }
-  deriving (Show)

-data CachedEntry
-  = CachedLink EntryIndex LinkScale
-  | CachedBalance Decimal
-  | CachedPercent Double
-
-data TxSortKey = TxSortKey
-  { tskDate :: !Day
-  , tskPriority :: !Int
-  , tskDesc :: !TxDesc
+data DBUpdates = DBUpdates
+  { duOldCommits :: ![Int]
+  , duNewTagIds :: ![Entity TagR]
+  , duNewAcntPaths :: ![AccountPathR]
+  , duNewAcntIds :: ![Entity AccountR]
+  , duNewCurrencyIds :: ![Entity CurrencyR]
  }
-  deriving (Show, Eq, Ord)

-- TODO this should actually be a ReadTx since it will be compared with other
-- Tx's to get the insert/update order correct
-data ReadEntry = ReadEntry
-  { reCurrency :: !CurrencyRId
-  , reAcnt :: !AccountRId
-  , reValue :: !Decimal
-  , reIndex :: !EntryIndex
-  , reESIndex :: !EntrySetIndex
-  , reSortKey :: !TxSortKey
-  }
-  deriving (Show)
+type CurrencyM = Reader CurrencyMap

-data UpdateEntry i v = UpdateEntry
-  { ueID :: !i
-  , ueAcnt :: !AccountRId
-  , ueValue :: !v
-  , ueIndex :: !EntryIndex
-  }
-  deriving (Show)
+type KeyEntry = Entry AccountRId Rational CurrencyRId TagRId

-deriving instance Functor (UpdateEntry i)
+type KeyTx = Tx KeyEntry

-newtype LinkScale = LinkScale {unLinkScale :: Double}
-  deriving newtype (Num, Show, Eq, Ord, Real, Fractional)
+type TreeR = Tree ([T.Text], AccountRId)

-newtype StaticValue = StaticValue {unStaticValue :: Decimal}
-  deriving newtype (Num, Show)
+type MonadFinance = MonadReader DBState

-data EntryValueUnk = EVBalance Decimal | EVPercent Double deriving (Show)
-
-type UEUnk = UpdateEntry EntryRId EntryValueUnk
-
-type UELink = UpdateEntry EntryRId LinkScale
-
-type UEBlank = UpdateEntry EntryRId ()
-
-type UE_RO = UpdateEntry () StaticValue
-
-type UEBalanced = UpdateEntry EntryRId StaticValue
-
-data UpdateEntrySet f t = UpdateEntrySet
-  { utFrom0 :: !f
-  , utTo0 :: !UEBlank
-  , utFromUnk :: ![(UEUnk, [UELink])]
-  , utToUnk :: ![UEUnk]
-  , utFromRO :: ![UE_RO]
-  , utToRO :: ![UE_RO]
-  , utCurrency :: !CurrencyRId
-  , utTotalValue :: !t
-  , utIndex :: !EntrySetIndex
-  , utSortKey :: !TxSortKey
-  }
-  deriving (Show)
-
-type TotalUpdateEntrySet = UpdateEntrySet (UEBlank, [UELink]) Decimal
-
-type FullUpdateEntrySet = UpdateEntrySet (Either UE_RO (UEUnk, [UELink])) ()
-
-data EntryCRU
-  = ToUpdate (Either TotalUpdateEntrySet FullUpdateEntrySet)
-  | ToRead ReadEntry
-  | ToInsert (Tx CommitR)
+askDBState :: MonadFinance m => (DBState -> a) -> m a
+askDBState = asks

 -------------------------------------------------------------------------------
 -- misc

+data AcntType
+  = AssetT
+  | EquityT
+  | ExpenseT
+  | IncomeT
+  | LiabilityT
+  deriving (Show, Eq, Ord, Lift, Hashable, Generic, Read, FromDhall)
+
+atName :: AcntType -> T.Text
+atName AssetT = "asset"
+atName EquityT = "equity"
+atName ExpenseT = "expense"
+atName IncomeT = "income"
+atName LiabilityT = "liability"
+
+data AcntPath = AcntPath
+  { apType :: !AcntType
+  , apChildren :: ![T.Text]
+  }
+  deriving (Eq, Ord, Show, Lift, Hashable, Generic, Read, FromDhall)
+
 data TxRecord = TxRecord
  { trDate :: !Day
-  , trAmount :: !Decimal
-  , trDesc :: !TxDesc
+  , trAmount :: !Rational
+  , trDesc :: !T.Text
  , trOther :: !(M.Map T.Text T.Text)
  , trFile :: !FilePath
  }
  deriving (Show, Eq, Ord)

+type DaySpan = (Day, Natural)
+
+data Keyed a = Keyed
+  { kKey :: !Int64
+  , kVal :: !a
+  }
+  deriving (Eq, Show, Functor)
+
 data Tree a = Branch !a ![Tree a] | Leaf !a deriving (Show)

+data AcntSign = Credit | Debit
+  deriving (Show)
+
+sign2Int :: AcntSign -> Int
+sign2Int Debit = 1
+sign2Int Credit = 1
+
 accountSign :: AcntType -> AcntSign
 accountSign AssetT = Debit
 accountSign ExpenseT = Debit
@ -193,81 +127,21 @@ accountSign IncomeT = Credit
 accountSign LiabilityT = Credit
 accountSign EquityT = Credit

-data HalfEntrySet v0 vN = HalfEntrySet
-  { hesPrimary :: !(Entry AcntID v0 TagID)
-  , hesOther :: ![Entry AcntID vN TagID]
-  }
-  deriving (Show)
+type RawEntry = Entry AcntID (Maybe Rational) CurID TagID

-data EntrySet v0 vp0 vpN vtN = EntrySet
-  { esTotalValue :: !v0
-  , esCurrency :: !CurrencyRId
-  , esFrom :: !(HalfEntrySet vp0 vpN)
-  , esTo :: !(HalfEntrySet () vtN)
-  }
-  deriving (Show)
+type BalEntry = Entry AcntID Rational CurID TagID

-type TotalEntrySet v0 vpN vtN = EntrySet v0 () vpN vtN
+type RawTx = Tx RawEntry

-type FullEntrySet vp0 vpN vtN = EntrySet () vp0 vpN vtN
-
-type PrimaryEntrySet = TotalEntrySet Decimal EntryValue EntryLink
-
-type SecondayEntrySet = FullEntrySet EntryValue EntryValue EntryLink
-
-type TransferEntrySet = SecondayEntrySet
-
-type ShadowEntrySet = TotalEntrySet Double EntryValue EntryLink
-
-data TxCommit = HistoryCommit CommitR | BudgetCommit CommitR T.Text
-  deriving (Eq, Ord, Show)
-
-data TxMeta k = TxMeta
-  { txmDate :: !Day
-  , txmPriority :: !Int
-  , txmDesc :: !TxDesc
-  , txmCommit :: !k
-  }
-  deriving (Show, Eq, Ord)
-
-data Tx k = Tx
-  { txMeta :: !(TxMeta k)
-  , txPrimary :: !(Either PrimaryEntrySet TransferEntrySet)
-  , txOther :: ![Either SecondayEntrySet ShadowEntrySet]
-  }
-  deriving (Generic, Show)
-
-data InsertEntry = InsertEntry
-  { ieCached :: !(Maybe CachedEntry)
-  , ieEntry :: !(Entry AccountRId Decimal TagRId)
-  }
-
-data InsertEntrySet = InsertEntrySet
-  { iesCurrency :: !CurrencyRId
-  , iesFromEntries :: !(NonEmpty InsertEntry)
-  , iesToEntries :: !(NonEmpty InsertEntry)
-  }
-
-data InsertTx = InsertTx
-  { itxMeta :: !(TxMeta CommitR)
-  , itxEntrySets :: !(NonEmpty InsertEntrySet)
-  }
-  deriving (Generic)
-
-data EntryValue_ a = EntryValue_ TransferType a
-  deriving (Show, Functor, Foldable, Traversable)
-
-data EntryValue = EntryFixed Decimal | EntryPercent Double | EntryBalance Decimal
-  deriving (Show, Eq, Ord)
-
-data EntryLink = LinkValue EntryValue | LinkIndex LinkedNumGetter
-  deriving (Show)
+type BalTx = Tx BalEntry

 data MatchRes a = MatchPass !a | MatchFail | MatchSkip

 --------------------------------------------------------------------------------
 -- exception types

+data BalanceType = TooFewEntries | NotOneBlank deriving (Show)
+
 data MatchType = MatchNumeric | MatchText deriving (Show)

 data EntryIDType = AcntField | CurField | TagField deriving (Show)
@ -279,53 +153,50 @@ data LookupSuberr
  | DBKey !EntryIDType
  deriving (Show)

+data AllocationSuberr
+  = NoAllocations
+  | ExceededTotal
+  | MissingBlank
+  | TooManyBlanks
+  deriving (Show)
+
 data PatternSuberr = ZeroLength | ZeroRepeats deriving (Show)

-data DBLinkSubError
-  = DBLinkNoScale
-  | DBLinkNoValue
-  | DBLinkInvalidValue !Rational !Bool
-  | DBLinkInvalidBalance
-  | DBLinkInvalidPercent
-  deriving (Show)
-
-data DBSubError
-  = DBShouldBeEmpty
-  | DBMultiScope
-  | DBUpdateUnbalanced
-  | DBLinkError !EntryRId !DBLinkSubError
-  deriving (Show)
-
-data AppError
+data InsertError
  = RegexError !T.Text
  | MatchValPrecisionError !Natural !Natural
-  | AccountTypeError !AcntID !(NE.NonEmpty AcntType)
-  | StatementIOError !T.Text
+  | AccountError !AcntID !(NE.NonEmpty AcntType)
+  | InsertIOError !T.Text
  | ParseError !T.Text
-  | ConversionError !T.Text !Bool
+  | ConversionError !T.Text
  | LookupError !LookupSuberr !T.Text
-  | DatePatternError !Natural !Natural !(Maybe Natural) !PatternSuberr
+  | BalanceError !BalanceType !CurID ![RawEntry]
+  | IncomeError !Day !T.Text !Rational
+  | PatternError !Natural !Natural !(Maybe Natural) !PatternSuberr
  | DaySpanError !Gregorian !(Maybe Gregorian)
-  | StatementError ![TxRecord] ![StatementParserRe]
+  | StatementError ![TxRecord] ![MatchRe]
  | PeriodError !Day !Day
-  | LinkError !EntryIndex !EntryIndex
-  | DBError !DBSubError
  deriving (Show)

-newtype AppException = AppException [AppError]
-  deriving (Show, Semigroup) via [AppError]
+newtype InsertException = InsertException [InsertError]
+  deriving (Show, Semigroup) via [InsertError]

-instance Exception AppException
+instance Exception InsertException

-type MonadAppError = MonadError AppException
+type MonadInsertError = MonadError InsertException

-type AppExceptT = ExceptT AppException
+type InsertExceptT = ExceptT InsertException

-type AppExcept = AppExceptT Identity
+type InsertExcept = InsertExceptT Identity

-type StatementParserRe = StatementParser (T.Text, Regex)
+data XGregorian = XGregorian
+  { xgYear :: !Int
+  , xgMonth :: !Int
+  , xgDay :: !Int
+  , xgDayOfWeek :: !Int
+  }

-type TransferMatcherRe = TransferMatcher_ Regex
+type MatchRe = StatementParser (T.Text, Regex)

 type TxOptsRe = TxOpts (T.Text, Regex)

--- a/lib/Internal/Utils.hs
+++ b/lib/Internal/Utils.hs
--- a/package.yaml
+++ b/package.yaml
@ -87,7 +87,6 @@ dependencies:
 - filepath
 - mtl
 - persistent-mtl >= 0.3.0.0
- Decimal >= 0.5.2

 library:
  source-dirs: lib/