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-rw-r--r--packages/dev-utils/src/blockchain_lifecycle.ts38
1 files changed, 37 insertions, 1 deletions
diff --git a/packages/dev-utils/src/blockchain_lifecycle.ts b/packages/dev-utils/src/blockchain_lifecycle.ts
index 4bb136097..587332f1a 100644
--- a/packages/dev-utils/src/blockchain_lifecycle.ts
+++ b/packages/dev-utils/src/blockchain_lifecycle.ts
@@ -1,3 +1,4 @@
+import { logUtils } from '@0xproject/utils';
import { uniqueVersionIds, Web3Wrapper } from '@0xproject/web3-wrapper';
import { includes } from 'lodash';
@@ -6,9 +7,17 @@ enum NodeType {
Ganache = 'GANACHE',
}
+// HACK(albrow): 🐉 We have to do this so that debug.setHead works correctly.
+// (Geth does not seem to like debug.setHead(0), so by sending some transactions
+// we increase the current block number beyond 0). Additionally, some tests seem
+// to break when there are fewer than 3 blocks in the chain. (We have no idea
+// why, but it was consistently reproducible).
+const MINIMUM_BLOCKS = 3;
+
export class BlockchainLifecycle {
private _web3Wrapper: Web3Wrapper;
private _snapshotIdsStack: number[];
+ private _addresses: string[] = [];
constructor(web3Wrapper: Web3Wrapper) {
this._web3Wrapper = web3Wrapper;
this._snapshotIdsStack = [];
@@ -21,7 +30,13 @@ export class BlockchainLifecycle {
this._snapshotIdsStack.push(snapshotId);
break;
case NodeType.Geth:
- const blockNumber = await this._web3Wrapper.getBlockNumberAsync();
+ let blockNumber = await this._web3Wrapper.getBlockNumberAsync();
+ if (blockNumber < MINIMUM_BLOCKS) {
+ // If the minimum block number is not met, force Geth to
+ // mine some blocks by sending some dummy transactions.
+ await this._mineMinimumBlocksAsync();
+ blockNumber = await this._web3Wrapper.getBlockNumberAsync();
+ }
this._snapshotIdsStack.push(blockNumber);
break;
default:
@@ -56,4 +71,25 @@ export class BlockchainLifecycle {
throw new Error(`Unknown client version: ${version}`);
}
}
+ 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,
+ );
+ }
+ logUtils.warn('Done mining the minimum number of blocks.');
+ }
}