Add support for including certificates in transactions in cardano-wasm

cardano-wasm/js-test/basic-test.spec.ts

@@ -8,5 +8,5 @@ test('test output matches', async ({ page }) => {
   // Wait for the test to finish running (we signal this by creating a tag with id "finish-tag" and text "Finished test!")
   await expect(page.locator('#finish-tag')).toHaveText("Finished test!");
   // Check the output of the test (from the example folder), which is displayed in the code element with id "test-output". The output contains information about the various objects and results of trying some of the functions.
-  await expect(page.locator('#test-output')).toHaveText("> \"Api object:\"> [object] {    objectType: cardano-api    tx: [object Object]    newGrpcConnection: async function (...args)    wallet: [object Object]  }> \"Bech32 of address:\"> \"addr_test1vp93p9em3regvgylxuvet6fgr3e9sn259pcejgrk4ykystcs7v8j6\"> \"UnsignedTx object:\"> [object] {    objectType: UnsignedTx    addTxInput: function (txId,txIx)    addSimpleTxOut: function (destAddr,lovelaceAmount)    setFee: function (lovelaceAmount)    estimateMinFee: function (protocolParams,numKeyWitnesses,numByronKeyWitnesses,totalRefScriptSize)    signWithPaymentKey: function (signingKey)  }> \"Estimated fee:\"> 164005n> \"SignedTx object:\"> [object] {    objectType: SignedTx    alsoSignWithPaymentKey: function (signingKey)    txToCbor: function ()  }> \"Tx CBOR:\"> \"84a300d9010281825820be6efd42a3d7b9a00d09d77a5d41e55ceaf0bd093a8aa8a893ce70d9caafd97800018182581d6082935e44937e8b530f32ce672b5d600d0a286b4e8a52c6555f659b871a00989680021a000280a5a100d9010281825820adfc1c30385916da87db1ba3328f0690a57ebb2a6ac9f6f86b2d97f943adae005840a49259b5977aea523b46f01261fbff93e0899e8700319e11f5ab96b67eb628fca1a233ce2d50ee3227b591b84f27237d920d63974d65728362382f751c4d9400f5f6\"");
+  await expect(page.locator('#test-output')).toHaveText("> \"Api object:\"> [object] {    objectType: cardano-api    tx: [object Object]    newGrpcConnection: async function (...args)    wallet: [object Object]  }> \"Bech32 of address:\"> \"addr_test1vp93p9em3regvgylxuvet6fgr3e9sn259pcejgrk4ykystcs7v8j6\"> \"UnsignedTx object:\"> [object] {    objectType: UnsignedTx    addTxInput: function (txId,txIx)    addSimpleTxOut: function (destAddr,lovelaceAmount)    appendCertificateToTx: function (certCbor)    setFee: function (lovelaceAmount)    estimateMinFee: function (protocolParams,numKeyWitnesses,numByronKeyWitnesses,totalRefScriptSize)    signWithPaymentKey: function (signingKey)  }> \"Estimated fee:\"> 164005n> \"SignedTx object:\"> [object] {    objectType: SignedTx    alsoSignWithPaymentKey: function (signingKey)    txToCbor: function ()  }> \"Tx CBOR:\"> \"84a300d9010281825820be6efd42a3d7b9a00d09d77a5d41e55ceaf0bd093a8aa8a893ce70d9caafd97800018182581d6082935e44937e8b530f32ce672b5d600d0a286b4e8a52c6555f659b871a00989680021a000280a5a100d9010281825820adfc1c30385916da87db1ba3328f0690a57ebb2a6ac9f6f86b2d97f943adae005840a49259b5977aea523b46f01261fbff93e0899e8700319e11f5ab96b67eb628fca1a233ce2d50ee3227b591b84f27237d920d63974d65728362382f751c4d9400f5f6\"");
 });

cardano-wasm/lib-wrapper/unsigned-tx.d.ts

@@ -27,6 +27,13 @@ declare interface UnsignedTx {
      */
     addSimpleTxOut(destAddr: string, lovelaceAmount: bigint): UnsignedTx;
 
+    /**
+     * Appends a certificate (in CBOR hex string format) to the transaction.
+     * @param certCbor The certificate in CBOR hex string format.
+     * @returns The `UnsignedTx` object with the added certificate.
+     */
+    appendCertificateToTx(certCbor: string): UnsignedTx;
+
     /**
      * Sets the fee for the transaction.
      * @param lovelaceAmount The fee amount in lovelaces.

cardano-wasm/src-lib/Cardano/Wasm/Api/Info.hs

@@ -302,6 +302,16 @@ apiInfo =
                     , methodReturnType = Fluent
                     , methodReturnDoc = "The `UnsignedTx` object with the added output."
                     }
+              , MethodInfoEntry $
+                  MethodInfo
+                    { methodName = "appendCertificateToTx"
+                    , methodDoc = "Appends a certificate (in CBOR hex string format) to the transaction."
+                    , methodParams =
+                        [ ParamInfo "certCbor" TSString "The certificate in CBOR hex string format."
+                        ]
+                    , methodReturnType = Fluent
+                    , methodReturnDoc = "The `UnsignedTx` object with the added certificate."
+                    }
               , MethodInfoEntry $
                   MethodInfo
                     { methodName = "setFee"

cardano-wasm/src-lib/Cardano/Wasm/Api/Tx.hs

@@ -3,6 +3,7 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE InstanceSigs #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE PolyKinds #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE TypeFamilies #-}
@@ -15,6 +16,7 @@ module Cardano.Wasm.Api.Tx
   , newConwayTxImpl
   , addTxInputImpl
   , addSimpleTxOutImpl
+  , appendCertificateToTxImpl
   , estimateMinFeeImpl
   , setFeeImpl
   , signWithPaymentKeyImpl
@@ -125,6 +127,21 @@ addSimpleTxOutImpl (UnsignedTxObject era (Exp.UnsignedTx tx)) destAddr lovelaceA
         (Api.AsAddressInEra Api.asType)
         (Text.pack destAddrStr)
 
+-- | Append a certificate (in CBOR hex string format) to an unsigned transaction object.
+appendCertificateToTxImpl
+  :: (HasCallStack, MonadThrow m) => UnsignedTxObject -> String -> m UnsignedTxObject
+appendCertificateToTxImpl (UnsignedTxObject era (Exp.UnsignedTx tx)) certCbor = do
+  Exp.Certificate cert <- deserialiseCertificate era certCbor
+  let tx' = tx & Ledger.bodyTxL . Ledger.certsTxBodyL %~ (<> StrictSeq.fromList [cert])
+  return $ UnsignedTxObject era $ Exp.UnsignedTx tx'
+ where
+  deserialiseCertificate
+    :: (HasCallStack, MonadThrow m) => Exp.Era era -> String -> m (Exp.Certificate (Exp.LedgerEra era))
+  deserialiseCertificate era' certCbor' =
+    obtainCommonConstraints era' $
+      rightOrError $
+        Api.deserialiseFromCBOR Exp.AsCertificate (Text.encodeUtf8 $ Text.pack certCbor')
+
 -- | Set the fee for an unsigned transaction object.
 setFeeImpl :: UnsignedTxObject -> Ledger.Coin -> UnsignedTxObject
 setFeeImpl (UnsignedTxObject era (Exp.UnsignedTx tx)) fee =

cardano-wasm/src-wasm/Cardano/Wasm/Internal/JavaScript/Bridge.hs

@@ -353,6 +353,9 @@ foreign export javascript "addTxInput"
 foreign export javascript "addSimpleTxOut"
   addSimpleTxOut :: JSUnsignedTx -> JSString -> JSCoin -> IO JSUnsignedTx
 
+foreign export javascript "appendCertificateToTx"
+  appendCertificateToTx :: JSUnsignedTx -> JSString -> IO JSUnsignedTx
+
 foreign export javascript "setFee"
   setFee :: JSUnsignedTx -> JSCoin -> IO JSUnsignedTx
 
@@ -394,6 +397,16 @@ addSimpleTxOut jsUnsignedTx jsDestAddr jsCoin =
           <*> fromJSVal jsCoin
       )
 
+-- | Append a certificate (in CBOR hex string format) to an unsigned transaction.
+appendCertificateToTx :: HasCallStack => JSUnsignedTx -> JSString -> IO JSUnsignedTx
+appendCertificateToTx jsUnsignedTx jsCertCbor =
+  toJSVal
+    =<< join
+      ( Wasm.appendCertificateToTxImpl
+          <$> fromJSVal jsUnsignedTx
+          <*> fromJSVal jsCertCbor
+      )
+
 -- | Set the transaction fee for an unsigned transaction.
 setFee :: HasCallStack => JSUnsignedTx -> JSCoin -> IO JSUnsignedTx
 setFee jsUnsignedTx jsCoin =