@ethereumjs/evm
Version:
JavaScript Ethereum Virtual Machine (EVM) implementation
61 lines • 2.68 kB
JavaScript
import { equalsBytes } from '@ethereumjs/util';
import { EVMError } from "../errors.js";
import { adjustSstoreGasEIP2929 } from "./EIP2929.js";
import { trap } from "./util.js";
/**
* Adjusts gas usage and refunds of SStore ops per EIP-2200 (Istanbul)
*
* @param {RunState} runState
* @param {Uint8Array} currentStorage
* @param {Uint8Array} originalStorage
* @param {Uint8Array} value
* @param {Common} common
*/
export function updateSstoreGasEIP2200(runState, currentStorage, originalStorage, value, key, common) {
// Fail if not enough gas is left
if (runState.interpreter.getGasLeft() <= common.param('sstoreSentryEIP2200Gas')) {
trap(EVMError.errorMessages.OUT_OF_GAS);
}
// Noop
if (equalsBytes(currentStorage, value)) {
const sstoreNoopCost = common.param('sstoreNoopEIP2200Gas');
return adjustSstoreGasEIP2929(runState, key, sstoreNoopCost, 'noop', common);
}
if (equalsBytes(originalStorage, currentStorage)) {
// Create slot
if (originalStorage.length === 0) {
return common.param('sstoreInitEIP2200Gas');
}
// Delete slot
if (value.length === 0) {
runState.interpreter.refundGas(common.param('sstoreClearRefundEIP2200Gas'), 'EIP-2200 -> sstoreClearRefundEIP2200');
}
// Write existing slot
return common.param('sstoreCleanEIP2200Gas');
}
if (originalStorage.length > 0) {
if (currentStorage.length === 0) {
// Recreate slot
runState.interpreter.subRefund(common.param('sstoreClearRefundEIP2200Gas'), 'EIP-2200 -> sstoreClearRefundEIP2200');
}
else if (value.length === 0) {
// Delete slot
runState.interpreter.refundGas(common.param('sstoreClearRefundEIP2200Gas'), 'EIP-2200 -> sstoreClearRefundEIP2200');
}
}
if (equalsBytes(originalStorage, value)) {
if (originalStorage.length === 0) {
// Reset to original non-existent slot
const sstoreInitRefund = common.param('sstoreInitRefundEIP2200Gas');
runState.interpreter.refundGas(adjustSstoreGasEIP2929(runState, key, sstoreInitRefund, 'initRefund', common), 'EIP-2200 -> initRefund');
}
else {
// Reset to original existing slot
const sstoreCleanRefund = common.param('sstoreCleanRefundEIP2200Gas');
runState.interpreter.refundGas(BigInt(adjustSstoreGasEIP2929(runState, key, sstoreCleanRefund, 'cleanRefund', common)), 'EIP-2200 -> cleanRefund');
}
}
// Dirty update
return common.param('sstoreDirtyEIP2200Gas');
}
//# sourceMappingURL=EIP2200.js.map