Merge branch 'v2-prototype' into fix/five_decimal_scenario

* v2-prototype: (75 commits)
  Update relayer grid tiles to use Text
  Fix build
  Update file structure
  Update 2.0.0 artifacts
  Move ledgerhq module declarations to typescript-typings
  Export LedgerEthereumClient type in subproviders
  Update artifacts
  Add logging and updated artifacts
  Fix migrations
  Run prettier
  Add Kovan artifacts
  Use ledger subprovider
  Add Kovan migrations
  Remove state variable from Link component in Portal
  Make registerAssetProxy append only
  Update staging api link
  Change getTransactionReceipt to awaitTransactionMined
  Move /docs route to the end
  Remove extra call to scrollIntoView for wallet in onboarding
  Update expectRevertReasonOrAlwaysFailingTransactionAsync to check status codes
  ...

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.');
+    }
 }