@nomiclabs/buidler
Version:
Buidler is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.
97 lines • 4.14 kB
JavaScript
;
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
result["default"] = mod;
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
const ethereumjs_util_1 = require("ethereumjs-util");
const t = __importStar(require("io-ts"));
const errors_1 = require("../errors");
const input_1 = require("../input");
const output_1 = require("../output");
// tslint:disable only-buidler-error
class EvmModule {
constructor(_node) {
this._node = _node;
}
async processRequest(method, params = []) {
switch (method) {
case "evm_increaseTime":
return this._increaseTimeAction(...this._increaseTimeParams(params));
case "evm_setNextBlockTimestamp":
return this._setNextBlockTimestampAction(...this._setNextBlockTimestampParams(params));
case "evm_mine":
return this._mineAction(...this._mineParams(params));
case "evm_revert":
return this._revertAction(...this._revertParams(params));
case "evm_snapshot":
return this._snapshotAction(...this._snapshotParams(params));
}
throw new errors_1.MethodNotFoundError(`Method ${method} not found`);
}
// evm_setNextBlockTimestamp
_setNextBlockTimestampParams(params) {
return input_1.validateParams(params, t.number);
}
async _setNextBlockTimestampAction(timestamp) {
const latestBlock = await this._node.getLatestBlock();
const increment = new ethereumjs_util_1.BN(timestamp).sub(new ethereumjs_util_1.BN(latestBlock.header.timestamp));
if (increment.lte(new ethereumjs_util_1.BN(0))) {
throw new errors_1.InvalidInputError(`Timestamp ${timestamp} is lower than previous block's timestamp` +
`${new ethereumjs_util_1.BN(latestBlock.header.timestamp).toNumber()}`);
}
await this._node.setNextBlockTimestamp(new ethereumjs_util_1.BN(timestamp));
return timestamp.toString();
}
// evm_increaseTime
_increaseTimeParams(params) {
return input_1.validateParams(params, t.number);
}
async _increaseTimeAction(increment) {
await this._node.increaseTime(new ethereumjs_util_1.BN(increment));
const totalIncrement = await this._node.getTimeIncrement();
// This RPC call is an exception: it returns a number in decimal
return totalIncrement.toString();
}
// evm_mine
_mineParams(params) {
if (params.length === 0) {
params.push(0);
}
return input_1.validateParams(params, t.number);
}
async _mineAction(timestamp) {
// if timestamp is specified, make sure it is bigger than previous
// block's timestamp
if (timestamp !== 0) {
const latestBlock = await this._node.getLatestBlock();
const increment = new ethereumjs_util_1.BN(timestamp).sub(new ethereumjs_util_1.BN(latestBlock.header.timestamp));
if (increment.lte(new ethereumjs_util_1.BN(0))) {
throw new errors_1.InvalidInputError(`Timestamp ${timestamp} is lower than previous block's timestamp` +
`${new ethereumjs_util_1.BN(latestBlock.header.timestamp).toNumber()}`);
}
}
await this._node.mineEmptyBlock(new ethereumjs_util_1.BN(timestamp));
return output_1.numberToRpcQuantity(0);
}
// evm_revert
_revertParams(params) {
return input_1.validateParams(params, input_1.rpcQuantity);
}
async _revertAction(snapshotId) {
return this._node.revertToSnapshot(snapshotId.toNumber());
}
// evm_snapshot
_snapshotParams(params) {
return [];
}
async _snapshotAction() {
const snapshotId = await this._node.takeSnapshot();
return output_1.numberToRpcQuantity(snapshotId);
}
}
exports.EvmModule = EvmModule;
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