@maxosllc/smart-order-router
Version:
BlockDAG Smart Order Router
148 lines • 17.1 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.V2PoolProvider = void 0;
const sdk_core_1 = require("@uniswap/sdk-core");
const v2_sdk_1 = require("@uniswap/v2-sdk");
const async_retry_1 = __importDefault(require("async-retry"));
const lodash_1 = __importDefault(require("lodash"));
const IUniswapV2Pair__factory_1 = require("../../types/v2/factories/IUniswapV2Pair__factory");
const util_1 = require("../../util");
const log_1 = require("../../util/log");
const routes_1 = require("../../util/routes");
const token_validator_provider_1 = require("../token-validator-provider");
class V2PoolProvider {
/**
* Creates an instance of V2PoolProvider.
* @param chainId The chain id to use.
* @param multicall2Provider The multicall provider to use to get the pools.
* @param tokenPropertiesProvider The token properties provider to use to get token properties.
* @param retryOptions The retry options for each call to the multicall.
*/
constructor(chainId, multicall2Provider, tokenPropertiesProvider, retryOptions = {
retries: 2,
minTimeout: 50,
maxTimeout: 500,
}) {
this.chainId = chainId;
this.multicall2Provider = multicall2Provider;
this.tokenPropertiesProvider = tokenPropertiesProvider;
this.retryOptions = retryOptions;
// Computing pool addresses is slow as it requires hashing, encoding etc.
// Addresses never change so can always be cached.
this.POOL_ADDRESS_CACHE = {};
}
async getPools(tokenPairs, providerConfig) {
var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k;
const poolAddressSet = new Set();
const sortedTokenPairs = [];
const sortedPoolAddresses = [];
for (const tokenPair of tokenPairs) {
const [tokenA, tokenB] = tokenPair;
const { poolAddress, token0, token1 } = this.getPoolAddress(tokenA, tokenB);
if (poolAddressSet.has(poolAddress)) {
continue;
}
poolAddressSet.add(poolAddress);
sortedTokenPairs.push([token0, token1]);
sortedPoolAddresses.push(poolAddress);
}
log_1.log.debug(`getPools called with ${tokenPairs.length} token pairs. Deduped down to ${poolAddressSet.size}`);
util_1.metric.putMetric('V2_RPC_POOL_RPC_CALL', 1, util_1.MetricLoggerUnit.None);
util_1.metric.putMetric('V2GetReservesBatchSize', sortedPoolAddresses.length, util_1.MetricLoggerUnit.Count);
util_1.metric.putMetric(`V2GetReservesBatchSize_${(0, util_1.ID_TO_NETWORK_NAME)(this.chainId)}`, sortedPoolAddresses.length, util_1.MetricLoggerUnit.Count);
const [reservesResults, tokenPropertiesMap] = await Promise.all([
(async () => {
const beforeReserves = Date.now();
const result = await this.getPoolsData(sortedPoolAddresses, 'getReserves', providerConfig);
util_1.metric.putMetric('V2GetReservesLatency', Date.now() - beforeReserves, util_1.MetricLoggerUnit.Milliseconds);
return result;
})(),
(async () => {
const beforeTokenProperties = Date.now();
const result = await this.tokenPropertiesProvider.getTokensProperties(this.flatten(tokenPairs), providerConfig);
util_1.metric.putMetric('V2GetTokenPropertiesLatency', Date.now() - beforeTokenProperties, util_1.MetricLoggerUnit.Milliseconds);
return result;
})(),
]);
log_1.log.info(`Got reserves for ${poolAddressSet.size} pools ${(providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)
? `as of block: ${await (providerConfig === null || providerConfig === void 0 ? void 0 : providerConfig.blockNumber)}.`
: ``}`);
const poolAddressToPool = {};
const invalidPools = [];
for (let i = 0; i < sortedPoolAddresses.length; i++) {
const reservesResult = reservesResults[i];
if (!(reservesResult === null || reservesResult === void 0 ? void 0 : reservesResult.success)) {
const [token0, token1] = sortedTokenPairs[i];
invalidPools.push([token0, token1]);
continue;
}
let [token0, token1] = sortedTokenPairs[i];
if (((_a = tokenPropertiesMap[token0.address.toLowerCase()]) === null || _a === void 0 ? void 0 : _a.tokenValidationResult) === token_validator_provider_1.TokenValidationResult.FOT) {
token0 = new sdk_core_1.Token(token0.chainId, token0.address, token0.decimals, token0.symbol, token0.name, true, // at this point we know it's valid token address
(_c = (_b = tokenPropertiesMap[token0.address.toLowerCase()]) === null || _b === void 0 ? void 0 : _b.tokenFeeResult) === null || _c === void 0 ? void 0 : _c.buyFeeBps, (_e = (_d = tokenPropertiesMap[token0.address.toLowerCase()]) === null || _d === void 0 ? void 0 : _d.tokenFeeResult) === null || _e === void 0 ? void 0 : _e.sellFeeBps);
}
if (((_f = tokenPropertiesMap[token1.address.toLowerCase()]) === null || _f === void 0 ? void 0 : _f.tokenValidationResult) === token_validator_provider_1.TokenValidationResult.FOT) {
token1 = new sdk_core_1.Token(token1.chainId, token1.address, token1.decimals, token1.symbol, token1.name, true, // at this point we know it's valid token address
(_h = (_g = tokenPropertiesMap[token1.address.toLowerCase()]) === null || _g === void 0 ? void 0 : _g.tokenFeeResult) === null || _h === void 0 ? void 0 : _h.buyFeeBps, (_k = (_j = tokenPropertiesMap[token1.address.toLowerCase()]) === null || _j === void 0 ? void 0 : _j.tokenFeeResult) === null || _k === void 0 ? void 0 : _k.sellFeeBps);
}
const { reserve0, reserve1 } = reservesResult.result;
const pool = new v2_sdk_1.Pair(util_1.CurrencyAmount.fromRawAmount(token0, reserve0.toString()), util_1.CurrencyAmount.fromRawAmount(token1, reserve1.toString()));
const poolAddress = sortedPoolAddresses[i];
poolAddressToPool[poolAddress] = pool;
}
if (invalidPools.length > 0) {
log_1.log.info({
invalidPools: lodash_1.default.map(invalidPools, ([token0, token1]) => `${token0.symbol}/${token1.symbol}`),
}, `${invalidPools.length} pools invalid after checking their slot0 and liquidity results. Dropping.`);
}
const poolStrs = lodash_1.default.map(Object.values(poolAddressToPool), routes_1.poolToString);
log_1.log.debug({ poolStrs }, `Found ${poolStrs.length} valid pools`);
return {
getPool: (tokenA, tokenB) => {
const { poolAddress } = this.getPoolAddress(tokenA, tokenB);
return poolAddressToPool[poolAddress];
},
getPoolByAddress: (address) => poolAddressToPool[address],
getAllPools: () => Object.values(poolAddressToPool),
};
}
getPoolAddress(tokenA, tokenB) {
const [token0, token1] = tokenA.sortsBefore(tokenB)
? [tokenA, tokenB]
: [tokenB, tokenA];
const cacheKey = `${this.chainId}/${token0.address}/${token1.address}`;
const cachedAddress = this.POOL_ADDRESS_CACHE[cacheKey];
if (cachedAddress) {
return { poolAddress: cachedAddress, token0, token1 };
}
const poolAddress = v2_sdk_1.Pair.getAddress(token0, token1);
this.POOL_ADDRESS_CACHE[cacheKey] = poolAddress;
return { poolAddress, token0, token1 };
}
async getPoolsData(poolAddresses, functionName, providerConfig) {
const { results, blockNumber } = await (0, async_retry_1.default)(async () => {
return this.multicall2Provider.callSameFunctionOnMultipleContracts({
addresses: poolAddresses,
contractInterface: IUniswapV2Pair__factory_1.IUniswapV2Pair__factory.createInterface(),
functionName: functionName,
providerConfig,
});
}, this.retryOptions);
log_1.log.debug(`Pool data fetched as of block ${blockNumber}`);
return results;
}
// We are using ES2017. ES2019 has native flatMap support
flatten(tokenPairs) {
const tokens = new Array();
for (const [tokenA, tokenB] of tokenPairs) {
tokens.push(tokenA);
tokens.push(tokenB);
}
return tokens;
}
}
exports.V2PoolProvider = V2PoolProvider;
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