Created
July 21, 2021 00:51
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| const BigNumber = require('bignumber.js'); | |
| import { JsonRpcProvider } from '@ethersproject/providers'; | |
| import { | |
| SOR as SOR2, | |
| SwapTypes, | |
| DisabledOptions, | |
| SwapOptions, | |
| PoolFilter, | |
| fetchSubgraphPools | |
| } from '@balancer-labs/sor2'; | |
| const provider = new JsonRpcProvider( | |
| `https://mainnet.infura.io/v3/${process.env.INFURA}` | |
| ); | |
| const DAI = '0x6B175474E89094C44Da98b954EedeAC495271d0F'; | |
| const USDC = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'; | |
| const amountIn = new BigNumber('1'); | |
| const tokenIn = USDC; | |
| const tokenOut = DAI; | |
| const gasPrice = new BigNumber('30000000000'); // You can set gas price to whatever the current price is. | |
| const swapCost = new BigNumber('100000'); // A pool swap costs approx 100000 gas | |
| // URL for pools data | |
| const poolsUrl = `https://storageapi.fleek.co/balancer-bucket/balancer-exchange/pools` | |
| async function swapExactIn() { | |
| const network = await provider.getNetwork() | |
| const chainId = network.chainId | |
| const maxPools = 100 | |
| const disableOptions: DisabledOptions = { | |
| isOverRide: false, | |
| disabledTokens: [] | |
| } | |
| const poolsSourceV2 = `https://storageapi.fleek.co/johngrantuk-team-bucket/poolsV2.json` | |
| const subgraphPoolsV2 = `https://api.thegraph.com/subgraphs/name/balancer-labs/balancer-v2` | |
| const sor2 = new SOR2( | |
| provider, | |
| gasPrice, | |
| maxPools, | |
| chainId, | |
| poolsSourceV2, | |
| swapCost, | |
| disableOptions | |
| ) | |
| const subgraphPools = await fetchSubgraphPools(subgraphPoolsV2) | |
| console.log('Fetch pool result: ', await sor2.fetchPools(true, subgraphPools)) | |
| const swapOptions: SwapOptions = { | |
| poolTypeFilter: PoolFilter.All, | |
| timestamp: Math.floor(Date.now() / 1000) | |
| } | |
| await sor2.setCostOutputToken( | |
| tokenOut, | |
| 6, | |
| swapCost | |
| ) | |
| const swapInfo2 = await sor2.getSwaps( | |
| tokenIn, | |
| tokenOut, | |
| SwapTypes.SwapExactIn, | |
| amountIn, | |
| swapOptions | |
| ) | |
| console.log(swapInfo2) | |
| } | |
| swapExactIn(); |
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