@xspswap/smart-order-router
Version:
XSwap Protocol V3 Smart Order Router
277 lines • 24.8 kB
JavaScript
import { FeeAmount, Pool } from '@x-swap-protocol/v3-sdk';
import JSBI from 'jsbi';
import _ from 'lodash';
import { unparseFeeAmount } from '../../util/amounts';
import { ChainId, WRAPPED_NATIVE_CURRENCY } from '../../util/chains';
import { log } from '../../util/log';
import { BBB_XDC, BIC_XDC, BTCx_XDC, CGO_XDC, CHUPAV2_XDC, CIFI_XDC, DOPU_XDC, EURS_XDC, FTHM_XDC, FXD_XDC, GAMA_XDC, LBT_XDC, PLI_XDC, PRNT_XDC, pstXDC_XDC, PWM3_XDC, REFI_XDC, SRX_XDC, USDC_XDC, USDT_XDC, USDT_XDC_APOTHEM, WBTC_XDC_APOTHEM, WTK_XDC, WXDC_XDC, XSP_XDC, XTT_XDC, XZO_XDC, } from '../token-provider';
const BASES_TO_CHECK_TRADES_AGAINST = {
[]: [WRAPPED_NATIVE_CURRENCY[ChainId.XDC], USDC_XDC],
[]: [
WRAPPED_NATIVE_CURRENCY[ChainId.XDC_APOTHEM],
USDT_XDC_APOTHEM,
WBTC_XDC_APOTHEM,
],
};
export const ADDITIONAL_BASES = {
[]: {
[].address]: [
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[]: [
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[]: [
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],
[]: [[WXDC_XDC, FeeAmount.HIGH]],
[]: [
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],
[]: [
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[]: [
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[]: [
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],
[]: [[WXDC_XDC, FeeAmount.MEDIUM]],
[]: [
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],
[]: [
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],
[]: [
[],
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],
[]: [[WXDC_XDC, FeeAmount.MEDIUM]],
[]: [[WXDC_XDC, FeeAmount.MEDIUM]],
},
[]: {},
};
export const V3_XDC_ADDITIONAL_BASES = ADDITIONAL_BASES[ChainId.XDC];
let paths = [];
const recFinder = (path, used, lastToken, dest, hops) => {
const hop = path.length;
// if (hop > 0) {
// lastToken = path[hop - 1]![1];
// }
if (hop < hops) {
if (!lastToken) {
return;
}
const additional = V3_XDC_ADDITIONAL_BASES[lastToken.address];
if (additional) {
for (const ad of additional) {
const adToken = ad;
const newPair = [lastToken, ...adToken];
const newPath = [...path, newPair];
if (adToken[0].address === dest.address) {
paths.push(newPath);
continue;
}
if (!used[adToken[0].address]) {
recFinder(newPath, { ...used, [adToken[0].address]: true }, adToken[0], dest, hops);
}
}
}
}
};
/**
* Provider that uses a hardcoded list of V3 pools to generate a list of subgraph pools.
*
* Since the pools are hardcoded and the data does not come from the Subgraph, the TVL values
* are dummys and should not be depended on.
*
* Useful for instances where other data sources are unavailable. E.g. Subgraph not available.
*
* @export
* @class StaticV3SubgraphProvider
*/
export class StaticV3SubgraphProvider {
constructor(chainId, poolProvider) {
this.chainId = chainId;
this.poolProvider = poolProvider;
}
async getPools(tokenIn, tokenOut) {
paths = [];
log.info('In static subgraph provider for V3');
const bases = BASES_TO_CHECK_TRADES_AGAINST[this.chainId];
const basePairs = _.flatMap(bases, (base) => bases.map((otherBase) => [base, otherBase]));
let pairs = [];
if (tokenIn && tokenOut) {
const additionalIn = ADDITIONAL_BASES[this.chainId][tokenIn.address];
const additionalOut = ADDITIONAL_BASES[this.chainId][tokenOut.address];
if (!additionalIn || !additionalOut) {
basePairs.push([tokenIn, tokenOut]);
if (additionalIn) {
basePairs.push(...additionalIn.map((v) => [tokenIn, v[0]]));
}
else {
basePairs.push(...bases.map((base) => [tokenIn, base]));
}
if (additionalOut) {
basePairs.push(...additionalOut.map((v) => [tokenOut, v[0]]));
}
else {
basePairs.push(...bases.map((base) => [tokenOut, base]));
}
pairs = _(basePairs)
.filter((tokens) => Boolean(tokens[0] && tokens[1]))
.filter(([tokenA, tokenB]) => tokenA.address !== tokenB.address && !tokenA.equals(tokenB))
.flatMap(([tokenA, tokenB]) => {
const additionalA = ADDITIONAL_BASES[this.chainId][tokenA.address];
// const additionalB = ADDITIONAL_BASES[this.chainId][tokenB.address];
if (additionalA) {
const additionalPool = additionalA.filter((v) => v[0].address.toLowerCase() === tokenB.address.toLowerCase());
const res = additionalPool.map((v) => {
return [tokenA, v[0], v[1]];
});
return res;
}
return [
[],
[],
[],
[],
];
})
.value();
}
else {
recFinder([], { [tokenIn.address]: true }, tokenIn, tokenOut, 5);
// console.log(
// paths.map((path) =>
// path
// .map(
// (p) => `(${p[0].symbol} - ${p[1].symbol} : ${p[2] / 10000}% )`
// )
// .join(' --> ')
// )
// );
const uniquePairs = {};
paths.forEach((path) => {
path.forEach((pool) => {
const id = `${pool[0].address}-${pool[1].address}-${pool[2]}`;
uniquePairs[id] = pool;
});
});
const direct = tokenIn && tokenOut
? [
[],
[],
[],
[],
]
: [];
pairs = [...Object.values(uniquePairs), ...direct];
}
}
log.info(`V3 Static subgraph provider about to get ${pairs.length} pools on-chain`);
const poolAccessor = await this.poolProvider.getPools(pairs);
const pools = poolAccessor.getAllPools();
const poolAddressSet = new Set();
const subgraphPools = _(pools)
.map((pool) => {
const { token0, token1, fee, liquidity } = pool;
const poolAddress = Pool.getAddress(pool.token0, pool.token1, pool.fee);
if (poolAddressSet.has(poolAddress)) {
return undefined;
}
poolAddressSet.add(poolAddress);
const liquidityNumber = JSBI.toNumber(liquidity);
return {
id: poolAddress,
feeTier: unparseFeeAmount(fee),
liquidity: liquidity.toString(),
token0: {
id: token0.address,
},
token1: {
id: token1.address,
},
// As a very rough proxy we just use liquidity for TVL.
tvlETH: liquidityNumber,
tvlUSD: liquidityNumber,
};
})
.compact()
.value();
return subgraphPools;
}
}
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