From eff0fb49b66734a2296628fe5533856b438013f9 Mon Sep 17 00:00:00 2001
From: La Ancapo <>
Date: Sun, 25 Jan 2026 22:27:30 +0100
Subject: [PATCH] split off the pretty printer module

---
 src/Main.hs   | 146 +-----------------------------------------------
 src/Pretty.hs | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 154 insertions(+), 144 deletions(-)
 create mode 100644 src/Pretty.hs

diff --git a/src/Main.hs b/src/Main.hs
index fd3225b..7f24263 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -4,23 +4,18 @@ module Main where
 
 import Control.Monad
 import qualified Data.ByteString as B
-import           Data.ByteString.Base32 (encodeBase32)
 import qualified Data.ByteString.Base64 as B64
 import qualified Data.ByteString.Char8 as BC8
-import Data.List
-import Data.Maybe
 import qualified Data.Text as T
-import qualified Data.Text.Encoding as T
 import qualified Data.Text.IO as T
-import qualified Data.Vector as V
 import Network.ONCRPC.XDR.Serial
-import Network.ONCRPC.XDR.Array
-import Network.Stellar.Keypair (encodeKey, EncodingVersion(..))
 import Network.Stellar.TransactionXdr
 import qualified Stellar.Simple as S
 import System.Directory
 import System.IO
 
+import Pretty
+
 main = do
   transactionB64 <- B.getContents
   let transaction =  case B64.decode $ BC8.strip transactionB64 of
@@ -52,140 +47,3 @@ confirm = do
     hClose tty
     pure $ response `elem` ["y", "Y"]
   else pure True
-
-b32 = encodeBase32 . unLengthArray
-utf8s = T.decodeUtf8Lenient . unLengthArray
-prettyKey x = encodeKey EncodingAccount $ unLengthArray x
-prettyAmount amount = T.show ((fromIntegral amount) / 1e7)
-prettyUnlines x = T.concat $ intersperse "\n" x
-prettyAssetCode x = T.decodeUtf8Lenient $ B.takeWhile (/= 0) $ unLengthArray x
-
-class Pretty a where
-  pretty :: a -> T.Text
-
-instance Pretty TransactionEnvelope where
-  pretty (TransactionEnvelope'ENVELOPE_TYPE_TX_V0 x) = pretty x
-  pretty (TransactionEnvelope'ENVELOPE_TYPE_TX x) = pretty x
-  pretty (TransactionEnvelope'ENVELOPE_TYPE_TX_FEE_BUMP x) = T.concat ["Fee bump to ", T.show x]
-
-instance Pretty TransactionV0Envelope where
-  pretty x = pretty $ transactionV0Envelope'tx x
-
-instance Pretty TransactionV1Envelope where
-  pretty x = pretty $ transactionV1Envelope'tx x
-
-instance Pretty TransactionV0 where
-  pretty x = prettyUnlines $ map T.concat
-    [ ["Fee: ", T.show (transactionV0'fee x)]
-    , ["Sequence: ", T.show (transactionV0'seqNum x)]
-    ]
-
-instance Pretty Transaction where
-  pretty x = prettyUnlines $ map T.concat
-    [ ["Source account: ", pretty $ transaction'sourceAccount x]
-    , ["Memo: ", pretty $ transaction'memo x]
-    , ["Operations:\n", prettyUnlines $ map (\op -> T.concat ["  ", pretty op]) $ V.toList $ unLengthArray $ transaction'operations x]
-    , ["Fee: ", T.show (transaction'fee x), " stroops"]
-    , ["Sequence: ", T.show (transaction'seqNum x)]
-    , ["Conditions: ", pretty (transaction'cond x)]
-    ]
-
-instance Pretty Memo where
-  pretty Memo'MEMO_NONE = ""
-  pretty (Memo'MEMO_ID x) = T.show x
-  pretty (Memo'MEMO_HASH x) = T.show x
-  pretty (Memo'MEMO_RETURN x) = T.show x
-  pretty (Memo'MEMO_TEXT t) = utf8s t
-
-instance Pretty Preconditions where
-  pretty Preconditions'PRECOND_NONE = "None"
-  pretty (Preconditions'PRECOND_TIME (TimeBounds min max)) = T.concat ["Time ", T.show min, " to ", T.show max]
-  pretty (Preconditions'PRECOND_V2 cond) = T.show cond
-
-instance Pretty Operation where
-  pretty (Operation Nothing body) = pretty body
-  pretty (Operation (Just account) body) = T.concat ["As ", pretty account, " ", pretty body]
-
-instance Pretty OperationBody where
-  pretty (OperationBody'CREATE_ACCOUNT x) = pretty x
-  pretty (OperationBody'PAYMENT x) = pretty x
---  pretty (OperationBody'PATH_PAYMENT_STRICT_RECEIVE x) = pretty x
---  pretty (OperationBody'MANAGE_SELL_OFFER x) = pretty x
---  pretty (OperationBody'CREATE_PASSIVE_SELL_OFFER x) = pretty x
-  pretty (OperationBody'SET_OPTIONS x) = pretty x
-  pretty (OperationBody'CHANGE_TRUST x) = pretty x
---  pretty (OperationBody'ALLOW_TRUST x) = pretty x
---  pretty (OperationBody'ACCOUNT_MERGE x) = pretty x
-  pretty OperationBody'INFLATION = "Inflation"
-  pretty (OperationBody'MANAGE_DATA x) = pretty x
---  pretty (OperationBody'BUMP_SEQUENCE x) = pretty x
---  pretty (OperationBody'MANAGE_BUY_OFFER x) = pretty x
---  pretty (OperationBody'PATH_PAYMENT_STRICT_SEND x) = pretty x
---  pretty (OperationBody'CREATE_CLAIMABLE_BALANCE x) = pretty x
---  pretty (OperationBody'CLAIM_CLAIMABLE_BALANCE x) = pretty x
-  pretty (OperationBody'BEGIN_SPONSORING_FUTURE_RESERVES (BeginSponsoringFutureReservesOp account)) = T.concat ["Sponsoring reserves for ", pretty account]
-  pretty OperationBody'END_SPONSORING_FUTURE_RESERVES = "No longer sponsored reserves"
---  pretty (OperationBody'REVOKE_SPONSORSHIP x) = pretty x
---  pretty (OperationBody'CLAWBACK x) = pretty x
---  pretty (OperationBody'CLAWBACK_CLAIMABLE_BALANCE x) = pretty x
-  pretty (OperationBody'SET_TRUST_LINE_FLAGS x) = pretty x
---  pretty (OperationBody'LIQUIDITY_POOL_DEPOSIT x) = pretty x
---  pretty (OperationBody'LIQUIDITY_POOL_WITHDRAW x) = pretty x
-  pretty x = T.show x
-
-instance Pretty SetOptionsOp where
-  pretty x = let prettyMaybe description prettifier x = pure $ T.concat ["    ", description, prettifier x] in
-              T.concat ["Set options:\n", prettyUnlines $ catMaybes
-              [ setOptionsOp'inflationDest x >>= prettyMaybe "Set inflation destination to " pretty
-              , setOptionsOp'clearFlags x >>= prettyMaybe "Clear flags: " T.show
-              , setOptionsOp'setFlags x >>= prettyMaybe "Set flags: " T.show
-              , setOptionsOp'masterWeight x >>= prettyMaybe "Master key weight: " T.show
-              , setOptionsOp'lowThreshold x >>= prettyMaybe "Low signing threshold: " T.show
-              , setOptionsOp'medThreshold x >>= prettyMaybe "Medium signing threshold: " T.show
-              , setOptionsOp'highThreshold x >>= prettyMaybe "High signing threshold: " T.show
-              , setOptionsOp'homeDomain x >>= prettyMaybe "Home domain: " T.show
-              , setOptionsOp'signer x >>= prettyMaybe "Signer: " pretty
-              ]]
-
-instance Pretty Signer where
-  pretty (Signer key weight) = T.concat [pretty key, " (", T.show weight, ")"]
-
-instance Pretty SignerKey where
-  pretty (SignerKey'SIGNER_KEY_TYPE_ED25519 x) = prettyKey x
-  pretty x = T.show x
-
-instance Pretty CreateAccountOp where
-  pretty (CreateAccountOp dest bal) = T.concat ["Create account ", pretty dest, " with starting balance ", T.show bal]
-
-instance Pretty SetTrustLineFlagsOp where
-  pretty (SetTrustLineFlagsOp trustor ass clearFlags setFlags)
-    | setFlags == 1 && clearFlags == 0 = T.concat ["Authorize ", pretty trustor, " ops with asset ", pretty ass]
-    | setFlags == 0 && clearFlags == 1 = T.concat ["Clear authorization ", pretty trustor, " ops with asset ", pretty ass]
-    | otherwise = T.concat ["Set trust line of ", pretty trustor, " to asset ", pretty ass, ": set flags ", T.show setFlags, ", clear flags ", T.show clearFlags]
-
-instance Pretty ChangeTrustOp where
-  pretty (ChangeTrustOp line limit) = T.concat ["Trust ", pretty line, " up to ", T.show limit]
-
-instance Pretty PaymentOp where
-  pretty (PaymentOp dest ass amount) = T.concat ["Pay ", prettyAmount amount, " ", pretty ass, " to ", pretty dest]
-
-instance Pretty ManageDataOp where
-  pretty (ManageDataOp name Nothing) = T.concat ["Data ", utf8s name, " cleared"]
-  pretty (ManageDataOp name (Just value)) = T.concat ["Data ", utf8s name, " = ", utf8s value]
-
-instance Pretty MuxedAccount where
-  pretty (MuxedAccount'KEY_TYPE_ED25519 x) = prettyKey x
-  pretty (MuxedAccount'KEY_TYPE_MUXED_ED25519 id key) = T.concat [b32 key, " (", T.show id, ")"]
-
-instance Pretty PublicKey where
-  pretty (PublicKey'PUBLIC_KEY_TYPE_ED25519 x) = prettyKey x
-
-instance Pretty Asset where
-  pretty Asset'ASSET_TYPE_NATIVE = "XLM"
-  pretty (Asset'ASSET_TYPE_CREDIT_ALPHANUM4 x) = pretty x
-  pretty (Asset'ASSET_TYPE_CREDIT_ALPHANUM12 x) = pretty x
-
-instance Pretty AlphaNum4 where
-  pretty (AlphaNum4 code issuer) = T.concat [prettyAssetCode code, "-", pretty issuer]
-instance Pretty AlphaNum12 where
-  pretty (AlphaNum12 code issuer) = T.concat [prettyAssetCode code, "-", pretty issuer]
diff --git a/src/Pretty.hs b/src/Pretty.hs
new file mode 100644
index 0000000..7bb933d
--- /dev/null
+++ b/src/Pretty.hs
@@ -0,0 +1,152 @@
+
+{-# LANGUAGE OverloadedStrings, Strict #-}
+
+module Pretty where
+
+import qualified Data.ByteString as B
+import           Data.ByteString.Base32 (encodeBase32)
+import Data.List
+import Data.Maybe
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import qualified Data.Vector as V
+import Network.ONCRPC.XDR.Array
+import Network.Stellar.Keypair (encodeKey, EncodingVersion(..))
+import Network.Stellar.TransactionXdr
+
+b32 = encodeBase32 . unLengthArray
+utf8s = T.decodeUtf8Lenient . unLengthArray
+prettyKey x = encodeKey EncodingAccount $ unLengthArray x
+prettyAmount amount = T.show ((fromIntegral amount) / 1e7)
+prettyUnlines x = T.concat $ intersperse "\n" x
+prettyAssetCode x = T.decodeUtf8Lenient $ B.takeWhile (/= 0) $ unLengthArray x
+
+class Pretty a where
+  pretty :: a -> T.Text
+
+instance Pretty TransactionEnvelope where
+  pretty (TransactionEnvelope'ENVELOPE_TYPE_TX_V0 x) = pretty x
+  pretty (TransactionEnvelope'ENVELOPE_TYPE_TX x) = pretty x
+  pretty (TransactionEnvelope'ENVELOPE_TYPE_TX_FEE_BUMP x) = T.concat ["Fee bump to ", T.show x]
+
+instance Pretty TransactionV0Envelope where
+  pretty x = pretty $ transactionV0Envelope'tx x
+
+instance Pretty TransactionV1Envelope where
+  pretty x = pretty $ transactionV1Envelope'tx x
+
+instance Pretty TransactionV0 where
+  pretty x = prettyUnlines $ map T.concat
+    [ ["Fee: ", T.show (transactionV0'fee x)]
+    , ["Sequence: ", T.show (transactionV0'seqNum x)]
+    ]
+
+instance Pretty Transaction where
+  pretty x = prettyUnlines $ map T.concat
+    [ ["Source account: ", pretty $ transaction'sourceAccount x]
+    , ["Memo: ", pretty $ transaction'memo x]
+    , ["Operations:\n", prettyUnlines $ map (\op -> T.concat ["  ", pretty op]) $ V.toList $ unLengthArray $ transaction'operations x]
+    , ["Fee: ", T.show (transaction'fee x), " stroops"]
+    , ["Sequence: ", T.show (transaction'seqNum x)]
+    , ["Conditions: ", pretty (transaction'cond x)]
+    ]
+
+instance Pretty Memo where
+  pretty Memo'MEMO_NONE = ""
+  pretty (Memo'MEMO_ID x) = T.show x
+  pretty (Memo'MEMO_HASH x) = T.show x
+  pretty (Memo'MEMO_RETURN x) = T.show x
+  pretty (Memo'MEMO_TEXT t) = utf8s t
+
+instance Pretty Preconditions where
+  pretty Preconditions'PRECOND_NONE = "None"
+  pretty (Preconditions'PRECOND_TIME (TimeBounds min max)) = T.concat ["Time ", T.show min, " to ", T.show max]
+  pretty (Preconditions'PRECOND_V2 cond) = T.show cond
+
+instance Pretty Operation where
+  pretty (Operation Nothing body) = pretty body
+  pretty (Operation (Just account) body) = T.concat ["As ", pretty account, " ", pretty body]
+
+instance Pretty OperationBody where
+  pretty (OperationBody'CREATE_ACCOUNT x) = pretty x
+  pretty (OperationBody'PAYMENT x) = pretty x
+--  pretty (OperationBody'PATH_PAYMENT_STRICT_RECEIVE x) = pretty x
+--  pretty (OperationBody'MANAGE_SELL_OFFER x) = pretty x
+--  pretty (OperationBody'CREATE_PASSIVE_SELL_OFFER x) = pretty x
+  pretty (OperationBody'SET_OPTIONS x) = pretty x
+  pretty (OperationBody'CHANGE_TRUST x) = pretty x
+--  pretty (OperationBody'ALLOW_TRUST x) = pretty x
+--  pretty (OperationBody'ACCOUNT_MERGE x) = pretty x
+  pretty OperationBody'INFLATION = "Inflation"
+  pretty (OperationBody'MANAGE_DATA x) = pretty x
+--  pretty (OperationBody'BUMP_SEQUENCE x) = pretty x
+--  pretty (OperationBody'MANAGE_BUY_OFFER x) = pretty x
+--  pretty (OperationBody'PATH_PAYMENT_STRICT_SEND x) = pretty x
+--  pretty (OperationBody'CREATE_CLAIMABLE_BALANCE x) = pretty x
+--  pretty (OperationBody'CLAIM_CLAIMABLE_BALANCE x) = pretty x
+  pretty (OperationBody'BEGIN_SPONSORING_FUTURE_RESERVES (BeginSponsoringFutureReservesOp account)) = T.concat ["Sponsoring reserves for ", pretty account]
+  pretty OperationBody'END_SPONSORING_FUTURE_RESERVES = "No longer sponsored reserves"
+--  pretty (OperationBody'REVOKE_SPONSORSHIP x) = pretty x
+--  pretty (OperationBody'CLAWBACK x) = pretty x
+--  pretty (OperationBody'CLAWBACK_CLAIMABLE_BALANCE x) = pretty x
+  pretty (OperationBody'SET_TRUST_LINE_FLAGS x) = pretty x
+--  pretty (OperationBody'LIQUIDITY_POOL_DEPOSIT x) = pretty x
+--  pretty (OperationBody'LIQUIDITY_POOL_WITHDRAW x) = pretty x
+  pretty x = T.show x
+
+instance Pretty SetOptionsOp where
+  pretty x = let prettyMaybe description prettifier x = pure $ T.concat ["    ", description, prettifier x] in
+              T.concat ["Set options:\n", prettyUnlines $ catMaybes
+              [ setOptionsOp'inflationDest x >>= prettyMaybe "Set inflation destination to " pretty
+              , setOptionsOp'clearFlags x >>= prettyMaybe "Clear flags: " T.show
+              , setOptionsOp'setFlags x >>= prettyMaybe "Set flags: " T.show
+              , setOptionsOp'masterWeight x >>= prettyMaybe "Master key weight: " T.show
+              , setOptionsOp'lowThreshold x >>= prettyMaybe "Low signing threshold: " T.show
+              , setOptionsOp'medThreshold x >>= prettyMaybe "Medium signing threshold: " T.show
+              , setOptionsOp'highThreshold x >>= prettyMaybe "High signing threshold: " T.show
+              , setOptionsOp'homeDomain x >>= prettyMaybe "Home domain: " T.show
+              , setOptionsOp'signer x >>= prettyMaybe "Signer: " pretty
+              ]]
+
+instance Pretty Signer where
+  pretty (Signer key weight) = T.concat [pretty key, " (", T.show weight, ")"]
+
+instance Pretty SignerKey where
+  pretty (SignerKey'SIGNER_KEY_TYPE_ED25519 x) = prettyKey x
+  pretty x = T.show x
+
+instance Pretty CreateAccountOp where
+  pretty (CreateAccountOp dest bal) = T.concat ["Create account ", pretty dest, " with starting balance ", T.show bal]
+
+instance Pretty SetTrustLineFlagsOp where
+  pretty (SetTrustLineFlagsOp trustor ass clearFlags setFlags)
+    | setFlags == 1 && clearFlags == 0 = T.concat ["Authorize ", pretty trustor, " ops with asset ", pretty ass]
+    | setFlags == 0 && clearFlags == 1 = T.concat ["Clear authorization ", pretty trustor, " ops with asset ", pretty ass]
+    | otherwise = T.concat ["Set trust line of ", pretty trustor, " to asset ", pretty ass, ": set flags ", T.show setFlags, ", clear flags ", T.show clearFlags]
+
+instance Pretty ChangeTrustOp where
+  pretty (ChangeTrustOp line limit) = T.concat ["Trust ", pretty line, " up to ", T.show limit]
+
+instance Pretty PaymentOp where
+  pretty (PaymentOp dest ass amount) = T.concat ["Pay ", prettyAmount amount, " ", pretty ass, " to ", pretty dest]
+
+instance Pretty ManageDataOp where
+  pretty (ManageDataOp name Nothing) = T.concat ["Data ", utf8s name, " cleared"]
+  pretty (ManageDataOp name (Just value)) = T.concat ["Data ", utf8s name, " = ", utf8s value]
+
+instance Pretty MuxedAccount where
+  pretty (MuxedAccount'KEY_TYPE_ED25519 x) = prettyKey x
+  pretty (MuxedAccount'KEY_TYPE_MUXED_ED25519 id key) = T.concat [b32 key, " (", T.show id, ")"]
+
+instance Pretty PublicKey where
+  pretty (PublicKey'PUBLIC_KEY_TYPE_ED25519 x) = prettyKey x
+
+instance Pretty Asset where
+  pretty Asset'ASSET_TYPE_NATIVE = "XLM"
+  pretty (Asset'ASSET_TYPE_CREDIT_ALPHANUM4 x) = pretty x
+  pretty (Asset'ASSET_TYPE_CREDIT_ALPHANUM12 x) = pretty x
+
+instance Pretty AlphaNum4 where
+  pretty (AlphaNum4 code issuer) = T.concat [prettyAssetCode code, "-", pretty issuer]
+instance Pretty AlphaNum12 where
+  pretty (AlphaNum12 code issuer) = T.concat [prettyAssetCode code, "-", pretty issuer]