quickswap-smart-order-router
Version:
QuickSwap Smart Order Router
126 lines • 10.6 kB
JavaScript
import retry from 'async-retry';
import Timeout from 'await-timeout';
import { gql, GraphQLClient } from 'graphql-request';
import _ from 'lodash';
import { ChainId } from '../../util/chains';
import { log } from '../../util/log';
export const printV3SubgraphPool = (s) => `${s.token0.id}/${s.token1.id}/${s.feeTier}`;
export const printV2SubgraphPool = (s) => `${s.token0.id}/${s.token1.id}`;
const SUBGRAPH_URL_BY_CHAIN = {
[ChainId.MAINNET]: 'https://api.thegraph.com/subgraphs/name/uniswap/uniswap-v3',
[ChainId.RINKEBY]: 'https://api.thegraph.com/subgraphs/name/ianlapham/uniswap-v3-rinkeby',
[ChainId.OPTIMISM]: 'https://api.thegraph.com/subgraphs/name/ianlapham/optimism-post-regenesis',
[ChainId.ARBITRUM_ONE]: 'https://api.thegraph.com/subgraphs/name/ianlapham/arbitrum-minimal',
[ChainId.POLYGON]: 'https://api.thegraph.com/subgraphs/name/ianlapham/uniswap-v3-polygon',
[ChainId.GÖRLI]: 'https://api.thegraph.com/subgraphs/name/ianlapham/uniswap-v3-gorli',
};
const PAGE_SIZE = 1000; // 1k is max possible query size from subgraph.
export class V3SubgraphProvider {
constructor(chainId, retries = 2, timeout = 30000, rollback = true) {
this.chainId = chainId;
this.retries = retries;
this.timeout = timeout;
this.rollback = rollback;
const subgraphUrl = SUBGRAPH_URL_BY_CHAIN[this.chainId];
if (!subgraphUrl) {
throw new Error(`No subgraph url for chain id: ${this.chainId}`);
}
this.client = new GraphQLClient(subgraphUrl);
}
async getPools(_tokenIn, _tokenOut, providerConfig) {
let blockNumber = (providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)
? await providerConfig.blockNumber
: undefined;
const query = gql `
query getPools($pageSize: Int!, $id: String) {
pools(
first: $pageSize
${blockNumber ? `block: { number: ${blockNumber} }` : ``}
where: { id_gt: $id }
) {
id
token0 {
symbol
id
}
token1 {
symbol
id
}
feeTier
liquidity
totalValueLockedUSD
totalValueLockedETH
}
}
`;
let pools = [];
log.info(`Getting V3 pools from the subgraph with page size ${PAGE_SIZE}${(providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)
? ` as of block ${providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber}`
: ''}.`);
await retry(async () => {
const timeout = new Timeout();
const getPools = async () => {
let lastId = '';
let pools = [];
let poolsPage = [];
do {
const poolsResult = await this.client.request(query, {
pageSize: PAGE_SIZE,
id: lastId,
});
poolsPage = poolsResult.pools;
pools = pools.concat(poolsPage);
lastId = pools[pools.length - 1].id;
} while (poolsPage.length > 0);
return pools;
};
try {
const getPoolsPromise = getPools();
const timerPromise = timeout.set(this.timeout).then(() => {
throw new Error(`Timed out getting pools from subgraph: ${this.timeout}`);
});
pools = await Promise.race([getPoolsPromise, timerPromise]);
return;
}
catch (err) {
throw err;
}
finally {
timeout.clear();
}
}, {
retries: this.retries,
onRetry: (err, retry) => {
if (this.rollback &&
blockNumber &&
_.includes(err.message, 'indexed up to')) {
blockNumber = blockNumber - 10;
log.info(`Detected subgraph indexing error. Rolled back block number to: ${blockNumber}`);
}
pools = [];
log.info({ err }, `Failed to get pools from subgraph. Retry attempt: ${retry}`);
},
});
const poolsSanitized = pools
.filter((pool) => parseInt(pool.liquidity) > 0)
.map((pool) => {
const { totalValueLockedETH, totalValueLockedUSD, ...rest } = pool;
return {
...rest,
id: pool.id.toLowerCase(),
token0: {
id: pool.token0.id.toLowerCase(),
},
token1: {
id: pool.token1.id.toLowerCase(),
},
tvlETH: parseFloat(totalValueLockedETH),
tvlUSD: parseFloat(totalValueLockedUSD),
};
});
log.info(`Got ${pools.length} V3 pools from the subgraph. ${poolsSanitized.length} after filtering`);
return poolsSanitized;
}
}
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