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60 lines
1.6 KiB
60 lines
1.6 KiB
const { ethGetBlock } = require('./web3');
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const pify = require('pify');
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function advanceBlock () {
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return pify(web3.currentProvider.sendAsync)({
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jsonrpc: '2.0',
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method: 'evm_mine',
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});
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}
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// Returns the time of the last mined block in seconds
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async function latest () {
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const block = await ethGetBlock('latest');
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return block.timestamp;
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}
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// Increases ganache time by the passed duration in seconds
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async function increase (duration) {
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if (duration < 0) throw Error(`Cannot increase time by a negative amount (${duration})`);
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await pify(web3.currentProvider.sendAsync)({
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jsonrpc: '2.0',
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method: 'evm_increaseTime',
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params: [duration],
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});
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await advanceBlock();
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}
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/**
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* Beware that due to the need of calling two separate ganache methods and rpc calls overhead
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* it's hard to increase time precisely to a target point so design your test to tolerate
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* small fluctuations from time to time.
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*
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* @param target time in seconds
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*/
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async function increaseTo (target) {
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const now = (await latest());
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if (target < now) throw Error(`Cannot increase current time (${now}) to a moment in the past (${target})`);
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const diff = target - now;
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return increase(diff);
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}
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const duration = {
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seconds: function (val) { return val; },
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minutes: function (val) { return val * this.seconds(60); },
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hours: function (val) { return val * this.minutes(60); },
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days: function (val) { return val * this.hours(24); },
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weeks: function (val) { return val * this.days(7); },
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years: function (val) { return val * this.days(365); },
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};
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module.exports = {
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advanceBlock,
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latest,
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increase,
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increaseTo,
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duration,
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};
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