core/vm: Rename SHA3 instruction to KECCAK256 (ethereum#23976)

This was proposed in 2016, Solidity uses this since 2017, and evmone and other VMs use the keccak256 name. This brings geth in line with those.

Author: axic

core/vm/evm.go

@@ -518,7 +518,7 @@ func (evm *EVM) Create(caller ContractRef, code []byte, gas uint64, value *big.I
 
 // Create2 creates a new contract using code as deployment code.
 //
-// The different between Create2 with Create is Create2 uses sha3(0xff ++ msg.sender ++ salt ++ sha3(init_code))[12:]
+// The different between Create2 with Create is Create2 uses keccak256(0xff ++ msg.sender ++ salt ++ keccak256(init_code))[12:]
 // instead of the usual sender-and-nonce-hash as the address where the contract is initialized at.
 func (evm *EVM) Create2(caller ContractRef, code []byte, gas uint64, endowment *big.Int, salt *uint256.Int) (ret []byte, contractAddr common.Address, leftOverGas uint64, err error) {
 	codeAndHash := &codeAndHash{code: code}

core/vm/gas_table.go

@@ -247,7 +247,7 @@ func makeGasLog(n uint64) gasFunc {
 	}
 }
 
-func gasSha3(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
+func gasKeccak256(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
 	gas, err := memoryGasCost(mem, memorySize)
 	if err != nil {
 		return 0, err
@@ -256,7 +256,7 @@ func gasSha3(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize
 	if overflow {
 		return 0, ErrGasUintOverflow
 	}
-	if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.Sha3WordGas); overflow {
+	if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.Keccak256WordGas); overflow {
 		return 0, ErrGasUintOverflow
 	}
 	if gas, overflow = math.SafeAdd(gas, wordGas); overflow {
@@ -290,7 +290,7 @@ func gasCreate2(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memoryS
 	if overflow {
 		return 0, ErrGasUintOverflow
 	}
-	if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.Sha3WordGas); overflow {
+	if wordGas, overflow = math.SafeMul(toWordSize(wordGas), params.Keccak256WordGas); overflow {
 		return 0, ErrGasUintOverflow
 	}
 	if gas, overflow = math.SafeAdd(gas, wordGas); overflow {

core/vm/instructions.go

@@ -231,7 +231,7 @@ func opSAR(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte
 	return nil, nil
 }
 
-func opSha3(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
+func opKeccak256(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
 	offset, size := scope.Stack.pop(), scope.Stack.peek()
 	data := scope.Memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
 

core/vm/instructions_test.go

@@ -558,7 +558,7 @@ func BenchmarkOpMstore(bench *testing.B) {
 	}
 }
 
-func BenchmarkOpSHA3(bench *testing.B) {
+func BenchmarkOpKeccak256(bench *testing.B) {
 	var (
 		env            = NewEVM(BlockContext{}, TxContext{}, nil, params.TestChainConfig, Config{})
 		stack          = newstack()
@@ -573,7 +573,7 @@ func BenchmarkOpSHA3(bench *testing.B) {
 	bench.ResetTimer()
 	for i := 0; i < bench.N; i++ {
 		stack.pushN(*uint256.NewInt(32), *start)
-		opSha3(&pc, evmInterpreter, &ScopeContext{mem, stack, nil})
+		opKeccak256(&pc, evmInterpreter, &ScopeContext{mem, stack, nil})
 	}
 }
 

core/vm/jump_table.go

@@ -342,13 +342,13 @@ func newFrontierInstructionSet() JumpTable {
 			minStack:    minStack(2, 1),
 			maxStack:    maxStack(2, 1),
 		},
-		SHA3: {
-			execute:     opSha3,
-			constantGas: params.Sha3Gas,
-			dynamicGas:  gasSha3,
+		KECCAK256: {
+			execute:     opKeccak256,
+			constantGas: params.Keccak256Gas,
+			dynamicGas:  gasKeccak256,
 			minStack:    minStack(2, 1),
 			maxStack:    maxStack(2, 1),
-			memorySize:  memorySha3,
+			memorySize:  memoryKeccak256,
 		},
 		ADDRESS: {
 			execute:     opAddress,

core/vm/memory_table.go

@@ -16,7 +16,7 @@
 
 package vm
 
-func memorySha3(stack *Stack) (uint64, bool) {
+func memoryKeccak256(stack *Stack) (uint64, bool) {
 	return calcMemSize64(stack.Back(0), stack.Back(1))
 }
 

core/vm/opcodes.go

@@ -70,7 +70,7 @@ const (
 	SHR    OpCode = 0x1c
 	SAR    OpCode = 0x1d
 
-	SHA3 OpCode = 0x20
+	KECCAK256 OpCode = 0x20
 )
 
 // 0x30 range - closure state.
@@ -254,7 +254,7 @@ var opCodeToString = map[OpCode]string{
 	MULMOD: "MULMOD",
 
 	// 0x20 range - crypto.
-	SHA3: "SHA3",
+	KECCAK256: "KECCAK256",
 
 	// 0x30 range - closure state.
 	ADDRESS:        "ADDRESS",
@@ -422,7 +422,7 @@ var stringToOp = map[string]OpCode{
 	"SAR":            SAR,
 	"ADDMOD":         ADDMOD,
 	"MULMOD":         MULMOD,
-	"SHA3":           SHA3,
+	"KECCAK256":      KECCAK256,
 	"ADDRESS":        ADDRESS,
 	"BALANCE":        BALANCE,
 	"ORIGIN":         ORIGIN,

params/protocol_params.go

@@ -35,8 +35,8 @@ const (
 	LogDataGas            uint64 = 8     // Per byte in a LOG* operation's data.
 	CallStipend           uint64 = 2300  // Free gas given at beginning of call.
 
-	Sha3Gas     uint64 = 30 // Once per SHA3 operation.
-	Sha3WordGas uint64 = 6  // Once per word of the SHA3 operation's data.
+	Keccak256Gas     uint64 = 30 // Once per KECCAK256 operation.
+	Keccak256WordGas uint64 = 6  // Once per word of the KECCAK256 operation's data.
 
 	SstoreSetGas    uint64 = 20000 // Once per SSTORE operation.
 	SstoreResetGas  uint64 = 5000  // Once per SSTORE operation if the zeroness changes from zero.