chore: apply state overrides to eth_estimateGas (#764)

* apply state override to eth call

* fix changelog

* fix lint

Author: thomas-nguy

CHANGELOG.md

@@ -42,6 +42,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (evm) [#742](https://github.com/crypto-org-chain/ethermint/pull/742) fix: prevent nil pointer dereference in tracer hooks
 * (evm) [#728](https://github.com/crypto-org-chain/ethermint/pull/728) feat: support preinstalls
 * (evm) [#722](https://github.com/crypto-org-chain/ethermint/pull/722) feat: support EIP-2935
+* (rpc) [#764](https://github.com/crypto-org-chain/ethermint/pull/764) rpc: apply state overrides to eth_estimateGas
 
 ## [v0.22.0] - 2025-08-12
 

rpc/backend/backend.go

@@ -130,7 +130,7 @@ type EVMBackend interface {
 	Resend(args evmtypes.TransactionArgs, gasPrice *hexutil.Big, gasLimit *hexutil.Uint64) (common.Hash, error)
 	SendRawTransaction(data hexutil.Bytes) (common.Hash, error)
 	SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.TransactionArgs, error)
-	EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rpctypes.BlockNumber) (hexutil.Uint64, error)
+	EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rpctypes.BlockNumber, overrides *json.RawMessage) (hexutil.Uint64, error)
 	DoCall(args evmtypes.TransactionArgs, blockNr rpctypes.BlockNumber, overrides *json.RawMessage) (*evmtypes.MsgEthereumTxResponse, error)
 	GasPrice() (*hexutil.Big, error)
 

rpc/backend/call_tx.go

@@ -292,7 +292,7 @@ func (b *Backend) SetTxDefaults(args evmtypes.TransactionArgs) (evmtypes.Transac
 		}
 
 		blockNr := rpctypes.NewBlockNumber(big.NewInt(0))
-		estimated, err := b.EstimateGas(callArgs, &blockNr)
+		estimated, err := b.EstimateGas(callArgs, &blockNr, nil)
 		if err != nil {
 			return args, err
 		}
@@ -319,7 +319,11 @@ func (b *Backend) handleRevertError(vmError string, ret []byte) error {
 }
 
 // EstimateGas returns an estimate of gas usage for the given smart contract call.
-func (b *Backend) EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rpctypes.BlockNumber) (hexutil.Uint64, error) {
+func (b *Backend) EstimateGas(
+	args evmtypes.TransactionArgs,
+	blockNrOptional *rpctypes.BlockNumber,
+	overrides *json.RawMessage,
+) (hexutil.Uint64, error) {
 	blockNr := rpctypes.EthPendingBlockNumber
 	if blockNrOptional != nil {
 		blockNr = *blockNrOptional
@@ -336,11 +340,17 @@ func (b *Backend) EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rp
 		return 0, errors.New("header not found")
 	}
 
+	var bzOverrides []byte
+	if overrides != nil {
+		bzOverrides = *overrides
+	}
+
 	req := evmtypes.EthCallRequest{
 		Args:            bz,
 		GasCap:          b.RPCGasCap(),
 		ProposerAddress: sdk.ConsAddress(header.Header.ProposerAddress),
 		ChainId:         b.chainID.Int64(),
+		Overrides:       bzOverrides,
 	}
 
 	// From ContextWithHeight: if the provided height is 0,
@@ -359,7 +369,8 @@ func (b *Backend) EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rp
 // DoCall performs a simulated call operation through the evmtypes. It returns the
 // estimated gas used on the operation or an error if fails.
 func (b *Backend) DoCall(
-	args evmtypes.TransactionArgs, blockNr rpctypes.BlockNumber,
+	args evmtypes.TransactionArgs,
+	blockNr rpctypes.BlockNumber,
 	overrides *json.RawMessage,
 ) (*evmtypes.MsgEthereumTxResponse, error) {
 	bz, err := json.Marshal(&args)

rpc/namespaces/ethereum/eth/api.go

@@ -93,7 +93,7 @@ type EthereumAPI interface {
 	// Returns information on the Ethereum network and internal settings.
 	ProtocolVersion() hexutil.Uint
 	GasPrice() (*hexutil.Big, error)
-	EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rpctypes.BlockNumber) (hexutil.Uint64, error)
+	EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rpctypes.BlockNumber, overrides *json.RawMessage) (hexutil.Uint64, error)
 	FeeHistory(blockCount math.HexOrDecimal64, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*rpctypes.FeeHistoryResult, error)
 	MaxPriorityFeePerGas() (*hexutil.Big, error)
 	ChainId() (*hexutil.Big, error)
@@ -322,9 +322,13 @@ func (e *PublicAPI) GasPrice() (*hexutil.Big, error) {
 }
 
 // EstimateGas returns an estimate of gas usage for the given smart contract call.
-func (e *PublicAPI) EstimateGas(args evmtypes.TransactionArgs, blockNrOptional *rpctypes.BlockNumber) (hexutil.Uint64, error) {
+func (e *PublicAPI) EstimateGas(
+	args evmtypes.TransactionArgs,
+	blockNrOptional *rpctypes.BlockNumber,
+	overrides *json.RawMessage,
+) (hexutil.Uint64, error) {
 	e.logger.Debug("eth_estimateGas")
-	return e.backend.EstimateGas(args, blockNrOptional)
+	return e.backend.EstimateGas(args, blockNrOptional, overrides)
 }
 
 func (e *PublicAPI) FeeHistory(blockCount math.HexOrDecimal64,

x/evm/keeper/grpc_query.go

@@ -356,6 +356,15 @@ func (k Keeper) EstimateGas(c context.Context, req *types.EthCallRequest) (*type
 		return nil, status.Error(codes.Internal, "failed to load evm config")
 	}
 
+	var overrides rpctypes.StateOverride
+	if len(req.Overrides) > 0 {
+		if err := json.Unmarshal(req.Overrides, &overrides); err != nil {
+			return nil, status.Error(codes.InvalidArgument, err.Error())
+		}
+
+		cfg.Overrides = &overrides
+	}
+
 	// ApplyMessageWithConfig expect correct nonce set in msg
 	nonce := k.GetNonce(ctx, args.GetFrom())
 	args.Nonce = (*hexutil.Uint64)(&nonce)