fix(evm): tx receipt proper marshalling

CHANGELOG.md

@@ -84,6 +84,7 @@ for (1) ERC20 transfers with tokens that return false success values instead of
 throwing an error and (2) ERC20 transfers with other operations that don't bring
 about the expected resulting balance for the transfer recipient.
 - [#2092](https://github.com/NibiruChain/nibiru/pull/2092) - feat(evm): add validation for wasm multi message execution
+- [#2101](https://github.com/NibiruChain/nibiru/pull/2101) - fix(evm): tx receipt proper marshalling
 
 #### Nibiru EVM | Before Audit 1 - 2024-10-18
 

eth/rpc/backend/tx_info.go

@@ -2,6 +2,7 @@
 package backend
 
 import (
+	"encoding/json"
 	"fmt"
 	"math"
 	"math/big"
@@ -134,10 +135,39 @@
 type TransactionReceipt struct {
 	gethcore.Receipt
 
-	ContractAddress   *gethcommon.Address `json:"contractAddress,omitempty"`
+	ContractAddress   *gethcommon.Address
 	From              gethcommon.Address
 	To                *gethcommon.Address
-	EffectiveGasPrice *big.Int
+	EffectiveGasPrice *hexutil.Big
+}
+
+// MarshalJSON is necessary because without it non gethcore.Receipt fields are omitted
+func (r *TransactionReceipt) MarshalJSON() ([]byte, error) {
+	// Marshal / unmarshal gethcore.Receipt to produce map[string]interface{}
+	receiptJson, err := json.Marshal(r.Receipt)
+	if err != nil {
+		return nil, err
+	}
+
+	var output map[string]interface{}
+	if err := json.Unmarshal(receiptJson, &output); err != nil {
+		return nil, err
+	}
+
+	// Add extra (non gethcore.Receipt) fields:
+	if r.ContractAddress != nil && *r.ContractAddress != (gethcommon.Address{}) {
+		output["contractAddress"] = r.ContractAddress
+	}
+	if r.From != (gethcommon.Address{}) {
+		output["from"] = r.From
+	}
+	if r.To != nil {
+		output["to"] = r.To
+	}
+	if r.EffectiveGasPrice != nil {
+		output["effectiveGasPrice"] = r.EffectiveGasPrice
+	}
+	return json.Marshal(output)
 }
 
 // GetTransactionReceipt returns the transaction receipt identified by hash.
@@ -253,7 +283,7 @@
 			// tolerate the error for pruned node.
 			b.logger.Error("fetch basefee failed, node is pruned?", "height", res.Height, "error", err)
 		} else {
-			receipt.EffectiveGasPrice = dynamicTx.EffectiveGasPriceWeiPerGas(baseFeeWei)
+			receipt.EffectiveGasPrice = (*hexutil.Big)(dynamicTx.EffectiveGasPriceWeiPerGas(baseFeeWei))
 		}
 	}
 	return &receipt, nil

eth/rpc/backend/tx_info_test.go

@@ -202,10 +202,10 @@ func (s *BackendSuite) TestReceiptMarshalJson() {
 		ContractAddress:   nil,
 		From:              evmtest.NewEthPrivAcc().EthAddr,
 		To:                &toAddr,
-		EffectiveGasPrice: big.NewInt(1),
+		EffectiveGasPrice: (*hexutil.Big)(big.NewInt(1)),
 	}
 
-	jsonBz, err := json.Marshal(tr)
+	jsonBz, err := tr.MarshalJSON()
 	s.Require().NoError(err)
 
 	gethReceipt := new(gethcore.Receipt)

evm-e2e/.prettierrc

@@ -0,0 +1,10 @@
+{
+  "semi": true,
+  "trailingComma": "all",
+  "singleQuote": true,
+  "printWidth": 120,
+  "tabWidth": 2,
+  "importOrder": ["^@core/(.*)$", "^@server/(.*)$", "^@ui/(.*)$", "^[./]"],
+  "importOrderSeparation": true,
+  "importOrderSortSpecifiers": true
+}

evm-e2e/contracts/EventsEmitter.sol

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.24;
+
+contract EventsEmitter {
+    event TestEvent(address indexed sender, uint256 value);
+
+    function emitEvent(uint256 value) public {
+        emit TestEvent(msg.sender, value);
+    }
+}