Implement support for getting and parsing blocks and transactions

1 files changed, 22 insertions, 0 deletions

diff --git a/packages/pipeline/src/data_sources/web3/index.ts b/packages/pipeline/src/data_sources/web3/index.ts
new file mode 100644
index 000000000..64e909939
--- /dev/null
+++ b/packages/pipeline/src/data_sources/web3/index.ts
@@ -0,0 +1,22 @@
+import { Web3ProviderEngine } from '@0x/subproviders';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import { BlockWithoutTransactionData, Transaction } from 'ethereum-types';
+
+export class Web3Source {
+    private _web3Wrapper: Web3Wrapper;
+    constructor(provider: Web3ProviderEngine) {
+        this._web3Wrapper = new Web3Wrapper(provider);
+    }
+
+    public async getBlockInfoAsync(blockNumber: number): Promise<BlockWithoutTransactionData> {
+        const block = await this._web3Wrapper.getBlockIfExistsAsync(blockNumber);
+        if (block == null) {
+            return Promise.reject(new Error('Could not find block for given block number: ' + blockNumber));
+        }
+        return block;
+    }
+
+    public async getTransactionInfoAsync(txHash: string): Promise<Transaction> {
+        return this._web3Wrapper.getTransactionByHashAsync(txHash);
+    }
+}