From 3b6c9902f308ffc595912802644c5d21616e61f5 Mon Sep 17 00:00:00 2001
From: Rob Mulholand <rmulholand@8thlight.com>
Date: Thu, 12 Sep 2019 14:22:22 -0500
Subject: [PATCH] core: remove unused gas return in ApplyTransaction (#20065)

---
 cmd/geth/retesteth.go   |  2 +-
 core/chain_makers.go    |  2 +-
 core/state_processor.go | 10 +++++-----
 miner/worker.go         |  2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/cmd/geth/retesteth.go b/cmd/geth/retesteth.go
index 9469c9f5f..b6aa3706b 100644
--- a/cmd/geth/retesteth.go
+++ b/cmd/geth/retesteth.go
@@ -508,7 +508,7 @@ func (api *RetestethAPI) mineBlock() error {
 				statedb.Prepare(tx.Hash(), common.Hash{}, txCount)
 				snap := statedb.Snapshot()
 
-				receipt, _, err := core.ApplyTransaction(
+				receipt, err := core.ApplyTransaction(
 					api.chainConfig,
 					api.blockchain,
 					&api.author,
diff --git a/core/chain_makers.go b/core/chain_makers.go
index 17f404211..0b0fcdb4a 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -103,7 +103,7 @@ func (b *BlockGen) AddTxWithChain(bc *BlockChain, tx *types.Transaction) {
 		b.SetCoinbase(common.Address{})
 	}
 	b.statedb.Prepare(tx.Hash(), common.Hash{}, len(b.txs))
-	receipt, _, err := ApplyTransaction(b.config, bc, &b.header.Coinbase, b.gasPool, b.statedb, b.header, tx, &b.header.GasUsed, vm.Config{})
+	receipt, err := ApplyTransaction(b.config, bc, &b.header.Coinbase, b.gasPool, b.statedb, b.header, tx, &b.header.GasUsed, vm.Config{})
 	if err != nil {
 		panic(err)
 	}
diff --git a/core/state_processor.go b/core/state_processor.go
index bed6a0730..cfe17d587 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -68,7 +68,7 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 	// Iterate over and process the individual transactions
 	for i, tx := range block.Transactions() {
 		statedb.Prepare(tx.Hash(), block.Hash(), i)
-		receipt, _, err := ApplyTransaction(p.config, p.bc, nil, gp, statedb, header, tx, usedGas, cfg)
+		receipt, err := ApplyTransaction(p.config, p.bc, nil, gp, statedb, header, tx, usedGas, cfg)
 		if err != nil {
 			return nil, nil, 0, err
 		}
@@ -85,10 +85,10 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 // and uses the input parameters for its environment. It returns the receipt
 // for the transaction, gas used and an error if the transaction failed,
 // indicating the block was invalid.
-func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, uint64, error) {
+func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, error) {
 	msg, err := tx.AsMessage(types.MakeSigner(config, header.Number))
 	if err != nil {
-		return nil, 0, err
+		return nil, err
 	}
 	// Create a new context to be used in the EVM environment
 	context := NewEVMContext(msg, header, bc, author)
@@ -98,7 +98,7 @@ func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *commo
 	// Apply the transaction to the current state (included in the env)
 	_, gas, failed, err := ApplyMessage(vmenv, msg, gp)
 	if err != nil {
-		return nil, 0, err
+		return nil, err
 	}
 	// Update the state with pending changes
 	var root []byte
@@ -125,5 +125,5 @@ func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *commo
 	receipt.BlockNumber = header.Number
 	receipt.TransactionIndex = uint(statedb.TxIndex())
 
-	return receipt, gas, err
+	return receipt, err
 }
diff --git a/miner/worker.go b/miner/worker.go
index 4a9528c39..183499ec3 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -704,7 +704,7 @@ func (w *worker) updateSnapshot() {
 func (w *worker) commitTransaction(tx *types.Transaction, coinbase common.Address) ([]*types.Log, error) {
 	snap := w.current.state.Snapshot()
 
-	receipt, _, err := core.ApplyTransaction(w.chainConfig, w.chain, &coinbase, w.current.gasPool, w.current.state, w.current.header, tx, &w.current.header.GasUsed, *w.chain.GetVMConfig())
+	receipt, err := core.ApplyTransaction(w.chainConfig, w.chain, &coinbase, w.current.gasPool, w.current.state, w.current.header, tx, &w.current.header.GasUsed, *w.chain.GetVMConfig())
 	if err != nil {
 		w.current.state.RevertToSnapshot(snap)
 		return nil, err