@sky-mavis/smart-order-router
Version:
Ronin Swap Smart Order Router
75 lines • 7.84 kB
JavaScript
import _ from 'lodash';
import { metric, MetricLoggerUnit } from '../../util';
import { log } from '../../util/log';
/**
* Provider for getting V3 pools, with functionality for caching the results.
* Does not cache by block because we compute quotes using the on-chain quoter
* so do not mind if the liquidity values are out of date.
*
* @export
* @class CachingV3PoolProvider
*/
export class CachingV3PoolProvider {
/**
* Creates an instance of CachingV3PoolProvider.
* @param chainId The chain id to use.
* @param poolProvider The provider to use to get the pools when not in the cache.
* @param cache Cache instance to hold cached pools.
*/
constructor(chainId, poolProvider, cache) {
this.chainId = chainId;
this.poolProvider = poolProvider;
this.cache = cache;
this.POOL_KEY = (chainId, address, blockNumber) => blockNumber ? `pool-${chainId}-${address}-${blockNumber}` : `pool-${chainId}-${address}`;
}
async getPools(tokenPairs, providerConfig) {
const poolAddressSet = new Set();
const poolsToGetTokenPairs = [];
const poolsToGetAddresses = [];
const poolAddressToPool = {};
const blockNumber = await (providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber);
for (const [tokenA, tokenB, feeAmount] of tokenPairs) {
const { poolAddress, token0, token1 } = this.getPoolAddress(tokenA, tokenB, feeAmount);
if (poolAddressSet.has(poolAddress)) {
continue;
}
poolAddressSet.add(poolAddress);
const cachedPool = await this.cache.get(this.POOL_KEY(this.chainId, poolAddress, blockNumber));
if (cachedPool) {
metric.putMetric('V3_INMEMORY_CACHING_POOL_HIT_IN_MEMORY', 1, MetricLoggerUnit.None);
poolAddressToPool[poolAddress] = cachedPool;
continue;
}
metric.putMetric('V3_INMEMORY_CACHING_POOL_MISS_NOT_IN_MEMORY', 1, MetricLoggerUnit.None);
poolsToGetTokenPairs.push([token0, token1, feeAmount]);
poolsToGetAddresses.push(poolAddress);
}
log.info({
poolsFound: _.map(Object.values(poolAddressToPool), p => `${p.token0.symbol} ${p.token1.symbol} ${p.fee}`),
poolsToGetTokenPairs: _.map(poolsToGetTokenPairs, t => `${t[0].symbol} ${t[1].symbol} ${t[2]}`),
}, `Found ${Object.keys(poolAddressToPool).length} V3 pools already in local cache. About to get liquidity and slot0s for ${poolsToGetTokenPairs.length} pools.`);
if (poolsToGetAddresses.length > 0) {
const poolAccessor = await this.poolProvider.getPools(poolsToGetTokenPairs, providerConfig);
for (const address of poolsToGetAddresses) {
const pool = poolAccessor.getPoolByAddress(address);
if (pool) {
poolAddressToPool[address] = pool;
// We don't want to wait for this caching to complete before returning the pools.
this.cache.set(this.POOL_KEY(this.chainId, address, blockNumber), pool);
}
}
}
return {
getPool: (tokenA, tokenB, feeAmount) => {
const { poolAddress } = this.getPoolAddress(tokenA, tokenB, feeAmount);
return poolAddressToPool[poolAddress];
},
getPoolByAddress: (address) => poolAddressToPool[address],
getAllPools: () => Object.values(poolAddressToPool),
};
}
getPoolAddress(tokenA, tokenB, feeAmount) {
return this.poolProvider.getPoolAddress(tokenA, tokenB, feeAmount);
}
}
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