From 72822b9e7ccfabdaa9eeb9086008cc9dcd932280 Mon Sep 17 00:00:00 2001
From: Tomas Guerra <54514587+GAtom22@users.noreply.github.com>
Date: Thu, 22 Dec 2022 05:07:52 -0300
Subject: [PATCH] fix(ante): fix reCheckTx gas wanted (#1566)

* fix(abci): fix reCheckTx gas wanted'

* fix(ante): add changelog entry
---
 CHANGELOG.md    |  2 +-
 app/ante/eth.go | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b622f9181a..e714e918cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -107,7 +107,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (analytics) [#1434](https://github.com/evmos/ethermint/pull/1434) Remove unbound labels from custom tendermint metrics.
 * (rpc) [#1484](https://github.com/evmos/ethermint/pull/1484) Align empty account result for old blocks as ethereum instead of return account not found error.
 * (rpc) [#1503](https://github.com/evmos/ethermint/pull/1503) Fix block hashes returned on JSON-RPC filter `eth_newBlockFilter`.
-
+* (ante) [#1566](https://github.com/evmos/ethermint/pull/1566) Fix `gasWanted` on `EthGasConsumeDecorator` ante handler when running transaction in `ReCheckMode`
 
 ## [v0.19.3] - 2022-10-14
 
diff --git a/app/ante/eth.go b/app/ante/eth.go
index c2f9fae80a..c83c5543c9 100644
--- a/app/ante/eth.go
+++ b/app/ante/eth.go
@@ -120,10 +120,18 @@ func NewEthGasConsumeDecorator(
 // - sets the gas meter limit
 // - gas limit is greater than the block gas meter limit
 func (egcd EthGasConsumeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bool, next sdk.AnteHandler) (sdk.Context, error) {
+	gasWanted := uint64(0)
 	// gas consumption limit already checked during CheckTx so there's no need to
 	// verify it again during ReCheckTx
 	if ctx.IsReCheckTx() {
-		return next(ctx, tx, simulate)
+		// Use new context with gasWanted = 0
+		// Otherwise, there's an error on txmempool.postCheck (tendermint)
+		// that is not bubbled up. Thus, the Tx never runs on DeliverMode
+		// Error: "gas wanted -1 is negative"
+		// For more information, see issue #1554
+		// https://github.com/evmos/ethermint/issues/1554
+		newCtx := ctx.WithGasMeter(ethermint.NewInfiniteGasMeterWithLimit(gasWanted))
+		return next(newCtx, tx, simulate)
 	}
 
 	chainCfg := egcd.evmKeeper.GetChainConfig(ctx)
@@ -132,7 +140,6 @@ func (egcd EthGasConsumeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simula
 	blockHeight := big.NewInt(ctx.BlockHeight())
 	homestead := ethCfg.IsHomestead(blockHeight)
 	istanbul := ethCfg.IsIstanbul(blockHeight)
-	gasWanted := uint64(0)
 	var events sdk.Events
 
 	// Use the lowest priority of all the messages as the final one.