@maxosllc/smart-order-router
Version:
BlockDAG Smart Order Router
66 lines • 6.97 kB
JavaScript
import _ from 'lodash';
import { log, poolToString } from '../util';
export class PoolProvider {
/**
* Creates an instance of V4PoolProvider.
* @param chainId The chain id to use.
* @param multicall2Provider The multicall provider to use to get the pools.
* @param retryOptions The retry options for each call to the multicall.
*/
constructor(chainId, multicall2Provider, retryOptions = {
retries: 2,
minTimeout: 50,
maxTimeout: 500,
}) {
this.chainId = chainId;
this.multicall2Provider = multicall2Provider;
this.retryOptions = retryOptions;
}
async getPoolsInternal(poolConstructs, providerConfig) {
const poolIdentifierSet = new Set();
const sortedCurrencyPairs = [];
const sortedPoolIdentifiers = [];
for (const poolConstruct of poolConstructs) {
const { poolIdentifier: poolIdentifier, currency0, currency1, } = this.getPoolIdentifier(poolConstruct);
if (poolIdentifierSet.has(poolIdentifier)) {
continue;
}
// It's the easiest way to change the pool construct in place, since we don't know the entire pool construct at compiling time.
poolConstruct[0] = currency0;
poolConstruct[1] = currency1;
poolIdentifierSet.add(poolIdentifier);
sortedCurrencyPairs.push(poolConstruct);
sortedPoolIdentifiers.push(poolIdentifier);
}
log.debug(`getPools called with ${poolConstructs.length} token pairs. Deduped down to ${poolIdentifierSet.size}`);
const [slot0Results, liquidityResults] = await Promise.all([
this.getPoolsData(sortedPoolIdentifiers, this.getSlot0FunctionName(), providerConfig),
this.getPoolsData(sortedPoolIdentifiers, this.getLiquidityFunctionName(), providerConfig),
]);
log.info(`Got liquidity and slot0s for ${poolIdentifierSet.size} pools ${(providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)
? `as of block: ${providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber}.`
: ``}`);
const poolIdentifierToPool = {};
const invalidPools = [];
for (let i = 0; i < sortedPoolIdentifiers.length; i++) {
const slot0Result = slot0Results[i];
const liquidityResult = liquidityResults[i];
// These properties tell us if a pool is valid and initialized or not.
if (!(slot0Result === null || slot0Result === void 0 ? void 0 : slot0Result.success) ||
!(liquidityResult === null || liquidityResult === void 0 ? void 0 : liquidityResult.success) ||
slot0Result.result.sqrtPriceX96.eq(0)) {
invalidPools.push(sortedCurrencyPairs[i]);
continue;
}
const slot0 = slot0Result.result;
const liquidity = liquidityResult.result[0];
const pool = this.instantiatePool(sortedCurrencyPairs[i], slot0, liquidity);
const poolIdentifier = sortedPoolIdentifiers[i];
poolIdentifierToPool[poolIdentifier] = pool;
}
const poolStrs = _.map(Object.values(poolIdentifierToPool), poolToString);
log.debug({ poolStrs }, `Found ${poolStrs.length} valid pools`);
return this.instantiatePoolAccessor(poolIdentifierToPool);
}
}
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