From d71fa6535987a0f13900f8e31dbb51772c12fc4f Mon Sep 17 00:00:00 2001
From: Alex Browne <stephenalexbrowne@gmail.com>
Date: Wed, 19 Sep 2018 12:09:36 -0700
Subject: Make contractAbi a parameter of getContractEventsAsync

---
 .../pipeline/src/data-sources/etherscan/events.ts  | 22 +++++++++++++++-------
 .../pipeline/src/data-sources/etherscan/index.ts   |  6 ++++--
 packages/pipeline/src/index.ts                     |  8 +++++++-
 3 files changed, 26 insertions(+), 10 deletions(-)

(limited to 'packages/pipeline/src')

diff --git a/packages/pipeline/src/data-sources/etherscan/events.ts b/packages/pipeline/src/data-sources/etherscan/events.ts
index 3083af267..89b3ffac1 100644
--- a/packages/pipeline/src/data-sources/etherscan/events.ts
+++ b/packages/pipeline/src/data-sources/etherscan/events.ts
@@ -1,9 +1,7 @@
 import { AbiDecoder } from '@0xproject/utils';
-import { DecodedLogArgs, LogEntry, LogWithDecodedArgs } from 'ethereum-types';
+import { AbiDefinition, DecodedLogArgs, LogEntry, LogWithDecodedArgs } from 'ethereum-types';
 import * as R from 'ramda';
 
-import { artifacts } from '../../artifacts';
-
 // Raw events response from etherescan.io
 export interface EventsResponse {
     status: string;
@@ -48,16 +46,26 @@ export function _convertResponseToLogEntry(result: EventsResponseResult): LogEnt
 
 // Decodes a LogEntry into a LogWithDecodedArgs
 // tslint:disable-next-line:completed-docs
-export function _decodeLogEntry(log: LogEntry): LogWithDecodedArgs<DecodedLogArgs> {
-    const abiDecoder = new AbiDecoder([artifacts.Exchange.compilerOutput.abi]);
+export const _decodeLogEntry = R.curry((contractAbi: AbiDefinition[], log: LogEntry): LogWithDecodedArgs<
+    DecodedLogArgs
+> => {
+    const abiDecoder = new AbiDecoder([contractAbi]);
     const logWithDecodedArgs = abiDecoder.tryToDecodeLogOrNoop(log);
     // tslint:disable-next-line:no-unnecessary-type-assertion
     return logWithDecodedArgs as LogWithDecodedArgs<DecodedLogArgs>;
-}
+});
 
 /**
  * Parses and abi-decodes the raw events response from etherscan.io.
+ * @param contractAbi The ABI for the contract that the events where emited from.
  * @param rawEventsResponse The raw events response from etherescan.io.
  * @returns Parsed and decoded events.
  */
-export const parseRawEventsResponse = R.pipe(R.map(_convertResponseToLogEntry), R.map(_decodeLogEntry));
+export function parseRawEventsResponse(
+    contractAbi: AbiDefinition[],
+    rawEventsResponse: EventsResponse,
+): Array<LogWithDecodedArgs<DecodedLogArgs>> {
+    return R.pipe(R.map(_convertResponseToLogEntry), R.map(_decodeLogEntry(contractAbi)))(rawEventsResponse.result);
+}
+
+// export const parseRawEventsResponse = R.pipe(R.map(_convertResponseToLogEntry), R.map(_decodeLogEntry));
diff --git a/packages/pipeline/src/data-sources/etherscan/index.ts b/packages/pipeline/src/data-sources/etherscan/index.ts
index 0891d351a..66b6b1a8d 100644
--- a/packages/pipeline/src/data-sources/etherscan/index.ts
+++ b/packages/pipeline/src/data-sources/etherscan/index.ts
@@ -1,5 +1,5 @@
 import { default as axios } from 'axios';
-import { BlockParam, BlockParamLiteral, DecodedLogArgs, LogWithDecodedArgs } from 'ethereum-types';
+import { AbiDefinition, BlockParam, BlockParamLiteral, DecodedLogArgs, LogWithDecodedArgs } from 'ethereum-types';
 
 import { EventsResponse, parseRawEventsResponse } from './events';
 
@@ -14,12 +14,14 @@ export class Etherscan {
     /**
      * Gets the decoded events for a specific contract and block range.
      * @param contractAddress  The address of the contract to get the events for.
+     * @param constractAbi The ABI of the contract.
      * @param fromBlock The start of the block range to get events for (inclusive).
      * @param toBlock The end of the block range to get events for (inclusive).
      * @returns A list of decoded events.
      */
     public async getContractEventsAsync(
         contractAddress: string,
+        contractAbi: AbiDefinition[],
         fromBlock: BlockParam = BlockParamLiteral.Earliest,
         toBlock: BlockParam = BlockParamLiteral.Latest,
     ): Promise<Array<LogWithDecodedArgs<DecodedLogArgs>>> {
@@ -28,7 +30,7 @@ export class Etherscan {
         }`;
         const resp = await axios.get<EventsResponse>(fullURL);
         // TODO(albrow): Check response code.
-        const decodedEvents = parseRawEventsResponse(resp.data.result);
+        const decodedEvents = parseRawEventsResponse(contractAbi, resp.data);
         return decodedEvents;
     }
 }
diff --git a/packages/pipeline/src/index.ts b/packages/pipeline/src/index.ts
index baed6933e..eccb24d18 100644
--- a/packages/pipeline/src/index.ts
+++ b/packages/pipeline/src/index.ts
@@ -1,7 +1,13 @@
 import { Etherscan } from './data-sources/etherscan';
 
+import { artifacts } from './artifacts';
+
 const etherscan = new Etherscan(process.env.ETHERSCAN_API_KEY as string);
 
 (async () => {
-    await etherscan.getContractEventsAsync('0x4f833a24e1f95d70f028921e27040ca56e09ab0b');
+    const events = await etherscan.getContractEventsAsync(
+        '0x4f833a24e1f95d70f028921e27040ca56e09ab0b',
+        artifacts.Exchange.compilerOutput.abi,
+    );
+    console.log(events);
 })();
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