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-rw-r--r--core/vm/eips.go92
1 files changed, 92 insertions, 0 deletions
diff --git a/core/vm/eips.go b/core/vm/eips.go
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+// Copyright 2019 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package vm
+
+import (
+ "fmt"
+
+ "github.com/ava-labs/coreth/params"
+)
+
+// EnableEIP enables the given EIP on the config.
+// This operation writes in-place, and callers need to ensure that the globally
+// defined jump tables are not polluted.
+func EnableEIP(eipNum int, jt *JumpTable) error {
+ switch eipNum {
+ case 2200:
+ enable2200(jt)
+ case 1884:
+ enable1884(jt)
+ case 1344:
+ enable1344(jt)
+ default:
+ return fmt.Errorf("undefined eip %d", eipNum)
+ }
+ return nil
+}
+
+// enable1884 applies EIP-1884 to the given jump table:
+// - Increase cost of BALANCE to 700
+// - Increase cost of EXTCODEHASH to 700
+// - Increase cost of SLOAD to 800
+// - Define SELFBALANCE, with cost GasFastStep (5)
+func enable1884(jt *JumpTable) {
+ // Gas cost changes
+ jt[BALANCE].constantGas = params.BalanceGasEIP1884
+ jt[EXTCODEHASH].constantGas = params.ExtcodeHashGasEIP1884
+ jt[SLOAD].constantGas = params.SloadGasEIP1884
+
+ // New opcode
+ jt[SELFBALANCE] = operation{
+ execute: opSelfBalance,
+ constantGas: GasFastStep,
+ minStack: minStack(0, 1),
+ maxStack: maxStack(0, 1),
+ valid: true,
+ }
+}
+
+func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
+ balance := interpreter.intPool.get().Set(interpreter.evm.StateDB.GetBalance(contract.Address()))
+ stack.push(balance)
+ return nil, nil
+}
+
+// enable1344 applies EIP-1344 (ChainID Opcode)
+// - Adds an opcode that returns the current chain’s EIP-155 unique identifier
+func enable1344(jt *JumpTable) {
+ // New opcode
+ jt[CHAINID] = operation{
+ execute: opChainID,
+ constantGas: GasQuickStep,
+ minStack: minStack(0, 1),
+ maxStack: maxStack(0, 1),
+ valid: true,
+ }
+}
+
+// opChainID implements CHAINID opcode
+func opChainID(pc *uint64, interpreter *EVMInterpreter, contract *Contract, memory *Memory, stack *Stack) ([]byte, error) {
+ chainId := interpreter.intPool.get().Set(interpreter.evm.chainConfig.ChainID)
+ stack.push(chainId)
+ return nil, nil
+}
+
+// enable2200 applies EIP-2200 (Rebalance net-metered SSTORE)
+func enable2200(jt *JumpTable) {
+ jt[SSTORE].dynamicGas = gasSStoreEIP2200
+}