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import * as _ from 'lodash';
import { constants } from './constants';
import { web3Wrapper } from './web3_wrapper';
let firstAccount: string | undefined;
// increases time by the given number of seconds and then mines a block so that
// the current block timestamp has the offset applied.
export async function increaseTimeAndMineBlockAsync(seconds: number): Promise<number> {
if (_.isUndefined(firstAccount)) {
const accounts = await web3Wrapper.getAvailableAddressesAsync();
firstAccount = accounts[0];
}
const offset = await web3Wrapper.increaseTimeAsync(seconds);
// Note: we need to send a transaction after increasing time so
// that a block is actually mined. The contract looks at the
// last mined block for the timestamp.
await web3Wrapper.awaitTransactionSuccessAsync(
await web3Wrapper.sendTransactionAsync({ from: firstAccount, to: firstAccount, value: 0 }),
constants.AWAIT_TRANSACTION_MINED_MS,
);
return offset;
}
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