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author | Fabio Berger <me@fabioberger.com> | 2018-06-07 18:18:53 +0800 |
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committer | Fabio Berger <me@fabioberger.com> | 2018-06-07 18:18:53 +0800 |
commit | 0fc981400442e4c567ca363bdf0f4c03ba87473d (patch) | |
tree | ee19dfb9dcd9c631fa4138326b9d639a7fc7374e /packages/contracts/src/utils/increase_time.ts | |
parent | e617da3bbf650b25c29df33cd12e23c994efe674 (diff) | |
parent | e0bc01eea1c20e0afda296f331c6a475e062b59c (diff) | |
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merge v2-prototype
Diffstat (limited to 'packages/contracts/src/utils/increase_time.ts')
-rw-r--r-- | packages/contracts/src/utils/increase_time.ts | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/packages/contracts/src/utils/increase_time.ts b/packages/contracts/src/utils/increase_time.ts new file mode 100644 index 000000000..4565d8dbc --- /dev/null +++ b/packages/contracts/src/utils/increase_time.ts @@ -0,0 +1,31 @@ +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. + * @param seconds the number of seconds by which to incrase the time offset. + * @returns a new Promise which will resolve with the new total time offset or + * reject if the time could not be increased. + */ +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; +} |