Watch pool initialize event (#123)

* Script to init pool.

* Watch pool initialize event.

packages/uni-watcher/README.md

@@ -0,0 +1,16 @@
+# Uniswap Watcher
+
+Run the server:
+
+```bash
+$ yarn server
+```
+
+Start watching the factory contract:
+
+Example:
+
+```bash
+$ npx ts-node src/cli/watch-contract.ts --configFile environments/local.toml --address 0xfE0034a874c2707c23F91D7409E9036F5e08ac34 --kind factory --startingBlock 100
+```
+

packages/uni-watcher/src/indexer.ts

@@ -15,6 +15,7 @@ import { Contract, KIND_FACTORY, KIND_POOL } from './entity/Contract';
 import { Config } from './config';
 
 import factoryABI from './artifacts/factory.json';
+import poolABI from './artifacts/pool.json';
 
 const log = debug('vulcanize:indexer');
 
@@ -33,6 +34,7 @@ export class Indexer {
   _getStorageAt: GetStorageAt
 
   _factoryContract: ethers.utils.Interface
+  _poolContract: ethers.utils.Interface
 
   constructor (config: Config, db: Database, ethClient: EthClient, pubsub: PubSub) {
     assert(config);
@@ -47,6 +49,7 @@ export class Indexer {
     this._getStorageAt = this._ethClient.getStorageAt.bind(this._ethClient);
 
     this._factoryContract = new ethers.utils.Interface(factoryABI);
+    this._poolContract = new ethers.utils.Interface(poolABI);
   }
 
   getEventIterator (): AsyncIterator<any> {
@@ -138,12 +141,35 @@ export class Indexer {
       let eventName;
       let eventProps = {};
 
-      if (uniContract.kind === KIND_FACTORY) {
-        const logDescription = this._factoryContract.parseLog({ data, topics });
-        const { token0, token1, fee, tickSpacing, pool } = logDescription.args;
+      switch (uniContract.kind) {
+        case KIND_FACTORY: {
+          const logDescription = this._factoryContract.parseLog({ data, topics });
+          switch (logDescription.name) {
+            case 'PoolCreated': {
+              eventName = logDescription.name;
+              const { token0, token1, fee, tickSpacing, pool } = logDescription.args;
+              eventProps = { token0, token1, fee, tickSpacing, pool };
 
-        eventName = logDescription.name;
-        eventProps = { token0, token1, fee, tickSpacing, pool };
+              break;
+            }
+          }
+
+          break;
+        }
+        case KIND_POOL: {
+          const logDescription = this._poolContract.parseLog({ data, topics });
+          switch (logDescription.name) {
+            case 'Initialize': {
+              eventName = logDescription.name;
+              const { sqrtPriceX96, tick } = logDescription.args;
+              eventProps = { sqrtPriceX96: sqrtPriceX96.toString(), tick };
+
+              break;
+            }
+          }
+
+          break;
+        }
       }
 
       let event: DeepPartial<Event> | undefined;

packages/uniswap/README.md

@@ -42,14 +42,16 @@ $ yarn deploy:token --network localhost --name Token0 --symbol TK0
 
 * **lint:schema**
 
-  Lint schema graphql files.
+  Lint schema graphql files:
+
   ```bash
   $ yarn lint:schema schema/frontend.graphql
   ```
 
 * **deploy:factory**
 
-  Deploy Factory contract.
+  Deploy Factory contract:
+
   ```bash
   $ yarn deploy:factory
 
@@ -59,18 +61,28 @@ $ yarn deploy:token --network localhost --name Token0 --symbol TK0
 
 * **deploy:token**
 
-  Deploy Token contract.
+  Deploy Token contract:
+
   ```bash
   $ yarn deploy:token --name TokenName --symbol TKS
   ```
 
 * **create:pool**
 
-  Create pool with factory contract and tokens.
+  Create pool with factory contract and tokens:
+
   ```bash
   $ yarn create:pool --factory 0xFactoryAddress --token0 0xToken0Address --token1 0xToken1Address --fee 500
   ```
 
+* **initialize:pool**
+
+  Initialize a pool with price:
+
+  ```bash
+  $ yarn initialize:pool --pool 0xPoolAddress --sqrt-price 4295128739
+    ```
+
 ## References
 
 * https://github.com/Uniswap/uniswap-v3-core

packages/uniswap/hardhat.config.ts

@@ -2,10 +2,11 @@ import 'dotenv/config';
 import { HardhatUserConfig } from "hardhat/config";
 import "@nomiclabs/hardhat-waffle";
 
-import './tasks/accounts'
-import './tasks/deploy-factory'
-import './tasks/deploy-token'
-import './tasks/create-pool'
+import './tasks/accounts';
+import './tasks/deploy-factory';
+import './tasks/deploy-token';
+import './tasks/create-pool';
+import './tasks/initialize-pool';
 
 const config: HardhatUserConfig = {
   solidity: "0.8.0",

packages/uniswap/package.json

@@ -8,7 +8,8 @@
     "lint:schema": "graphql-schema-linter",
     "deploy:factory": "hardhat deploy-factory",
     "deploy:token": "hardhat deploy-token",
-    "create:pool": "hardhat create-pool"
+    "create:pool": "hardhat create-pool",
+    "initialize:pool": "hardhat initialize-pool"
   },
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.2",

packages/uniswap/tasks/initialize-pool.ts

@@ -0,0 +1,26 @@
+import { task, types } from "hardhat/config";
+import {
+  abi as POOL_ABI,
+} from '@uniswap/v3-core/artifacts/contracts/UniswapV3Pool.sol/UniswapV3Pool.json'
+import { ContractTransaction } from "ethers";
+import '@nomiclabs/hardhat-ethers';
+
+task("initialize-pool", "Initializes a pool")
+  .addParam('pool', 'Address of pool contract', undefined, types.string)
+  .addParam('sqrtPrice', 'Initial sqrtPriceX96', undefined, types.int)
+  .setAction(async (args, hre) => {
+    const { pool: poolAddress, sqrtPrice } = args
+    const [signer] = await hre.ethers.getSigners();
+    const pool = new hre.ethers.Contract(poolAddress, POOL_ABI, signer);
+    const transaction: ContractTransaction = await pool.initialize(sqrtPrice);
+    const receipt = await transaction.wait();
+
+    if (receipt.events) {
+      const poolInitializeEvent = receipt.events.find(el => el.event === 'Initialize');
+
+      if (poolInitializeEvent && poolInitializeEvent.args) {
+        const { sqrtPriceX96, tick } = poolInitializeEvent.args;
+        console.log('Pool initialized:', sqrtPriceX96.toString(), tick);
+      }
+    }
+  });