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-rw-r--r--packages/dev-utils/src/blockchain_lifecycle.ts43
1 files changed, 27 insertions, 16 deletions
diff --git a/packages/dev-utils/src/blockchain_lifecycle.ts b/packages/dev-utils/src/blockchain_lifecycle.ts
index 9bd65ee5d..a48cb0856 100644
--- a/packages/dev-utils/src/blockchain_lifecycle.ts
+++ b/packages/dev-utils/src/blockchain_lifecycle.ts
@@ -10,8 +10,8 @@ import * as _ from 'lodash';
const MINIMUM_BLOCKS = 3;
export class BlockchainLifecycle {
- private _web3Wrapper: Web3Wrapper;
- private _snapshotIdsStack: number[];
+ private readonly _web3Wrapper: Web3Wrapper;
+ private readonly _snapshotIdsStack: number[];
private _addresses: string[] = [];
private _nodeType: NodeType | undefined;
constructor(web3Wrapper: Web3Wrapper) {
@@ -34,6 +34,12 @@ export class BlockchainLifecycle {
blockNumber = await this._web3Wrapper.getBlockNumberAsync();
}
this._snapshotIdsStack.push(blockNumber);
+ // HACK(albrow) It's possible that we applied a time offset but
+ // the transaction we mined to put that time offset into the
+ // blockchain was reverted. As a workaround, we mine a new dummy
+ // block so that the latest block timestamp accounts for any
+ // possible time offsets.
+ await this._mineDummyBlockAsync();
break;
default:
throw new Error(`Unknown node type: ${nodeType}`);
@@ -59,22 +65,9 @@ export class BlockchainLifecycle {
}
private async _mineMinimumBlocksAsync(): Promise<void> {
logUtils.warn('WARNING: minimum block number for tests not met. Mining additional blocks...');
- if (this._addresses.length === 0) {
- this._addresses = await this._web3Wrapper.getAvailableAddressesAsync();
- if (this._addresses.length === 0) {
- throw new Error('No accounts found');
- }
- }
while ((await this._web3Wrapper.getBlockNumberAsync()) < MINIMUM_BLOCKS) {
logUtils.warn('Mining block...');
- await this._web3Wrapper.awaitTransactionMinedAsync(
- await this._web3Wrapper.sendTransactionAsync({
- from: this._addresses[0],
- to: this._addresses[0],
- value: '0',
- }),
- 0,
- );
+ await this._mineDummyBlockAsync();
}
logUtils.warn('Done mining the minimum number of blocks.');
}
@@ -84,4 +77,22 @@ export class BlockchainLifecycle {
}
return this._nodeType;
}
+ // Sends a transaction that has no real effect on the state and waits for it
+ // to be mined.
+ private async _mineDummyBlockAsync(): Promise<void> {
+ if (this._addresses.length === 0) {
+ this._addresses = await this._web3Wrapper.getAvailableAddressesAsync();
+ if (this._addresses.length === 0) {
+ throw new Error('No accounts found');
+ }
+ }
+ await this._web3Wrapper.awaitTransactionMinedAsync(
+ await this._web3Wrapper.sendTransactionAsync({
+ from: this._addresses[0],
+ to: this._addresses[0],
+ value: '0',
+ }),
+ 0,
+ );
+ }
}