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perf(ethereum): reduce number of calls by batching all polling node c…
…alls (Uniswap#840) * initial refactoring * rebase lint error * start implementing reducer * multicall reducer * working multicall! * clean up performance, re-fix annoying error * use multicall everywhere * use multicall for balances * fix lint warning * Use checksummed address * Fix strict warning * get it to a working state with the more generic form * convert useETHBalances * Remove the eth-scan contract completely * Remove the eth-scan contract completely more * Default export * Put the encoding/decoding in the methods that can do it most efficiently * Avoid duplicate fetches via debounce * Reduce delay to something less noticeable * Return null if pair reserves are undefined to indicate it does not exist
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| import { Interface } from '@ethersproject/abi' | ||
| import ERC20_ABI from './erc20.json' | ||
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|
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| const ERC20_INTERFACE = new Interface(ERC20_ABI) | ||
|
|
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| export default ERC20_INTERFACE |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| [ | ||
| { | ||
| "constant": true, | ||
| "inputs": [], | ||
| "name": "getCurrentBlockTimestamp", | ||
| "outputs": [ | ||
| { | ||
| "name": "timestamp", | ||
| "type": "uint256" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [ | ||
| { | ||
| "components": [ | ||
| { | ||
| "name": "target", | ||
| "type": "address" | ||
| }, | ||
| { | ||
| "name": "callData", | ||
| "type": "bytes" | ||
| } | ||
| ], | ||
| "name": "calls", | ||
| "type": "tuple[]" | ||
| } | ||
| ], | ||
| "name": "aggregate", | ||
| "outputs": [ | ||
| { | ||
| "name": "blockNumber", | ||
| "type": "uint256" | ||
| }, | ||
| { | ||
| "name": "returnData", | ||
| "type": "bytes[]" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [], | ||
| "name": "getLastBlockHash", | ||
| "outputs": [ | ||
| { | ||
| "name": "blockHash", | ||
| "type": "bytes32" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [ | ||
| { | ||
| "name": "addr", | ||
| "type": "address" | ||
| } | ||
| ], | ||
| "name": "getEthBalance", | ||
| "outputs": [ | ||
| { | ||
| "name": "balance", | ||
| "type": "uint256" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [], | ||
| "name": "getCurrentBlockDifficulty", | ||
| "outputs": [ | ||
| { | ||
| "name": "difficulty", | ||
| "type": "uint256" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [], | ||
| "name": "getCurrentBlockGasLimit", | ||
| "outputs": [ | ||
| { | ||
| "name": "gaslimit", | ||
| "type": "uint256" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [], | ||
| "name": "getCurrentBlockCoinbase", | ||
| "outputs": [ | ||
| { | ||
| "name": "coinbase", | ||
| "type": "address" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| }, | ||
| { | ||
| "constant": true, | ||
| "inputs": [ | ||
| { | ||
| "name": "blockNumber", | ||
| "type": "uint256" | ||
| } | ||
| ], | ||
| "name": "getBlockHash", | ||
| "outputs": [ | ||
| { | ||
| "name": "blockHash", | ||
| "type": "bytes32" | ||
| } | ||
| ], | ||
| "payable": false, | ||
| "stateMutability": "view", | ||
| "type": "function" | ||
| } | ||
| ] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| import { ChainId } from '@uniswap/sdk' | ||
| import MULTICALL_ABI from './abi.json' | ||
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| const MULTICALL_NETWORKS: { [chainId in ChainId]: string } = { | ||
| [ChainId.MAINNET]: '0xeefBa1e63905eF1D7ACbA5a8513c70307C1cE441', | ||
| [ChainId.ROPSTEN]: '0x53C43764255c17BD724F74c4eF150724AC50a3ed', | ||
| [ChainId.KOVAN]: '0x2cc8688C5f75E365aaEEb4ea8D6a480405A48D2A', | ||
| [ChainId.RINKEBY]: '0x42Ad527de7d4e9d9d011aC45B31D8551f8Fe9821', | ||
| [ChainId.GÖRLI]: '0x77dCa2C955b15e9dE4dbBCf1246B4B85b651e50e' | ||
| } | ||
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| export { MULTICALL_ABI, MULTICALL_NETWORKS } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,26 +1,17 @@ | ||
| import { Contract } from '@ethersproject/contracts' | ||
| import { Token, TokenAmount } from '@uniswap/sdk' | ||
| import useSWR from 'swr' | ||
| import { useMemo } from 'react' | ||
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| import { SWRKeys, useKeepSWRDataLiveAsBlocksArrive } from '.' | ||
| import { useTokenContract } from '../hooks' | ||
| import { useTokenContract } from '../hooks/useContract' | ||
| import { useSingleCallResult } from '../state/multicall/hooks' | ||
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| function getTokenAllowance(contract: Contract, token: Token): (owner: string, spender: string) => Promise<TokenAmount> { | ||
| return async (owner: string, spender: string): Promise<TokenAmount> => | ||
| contract | ||
| .allowance(owner, spender) | ||
| .then((balance: { toString: () => string }) => new TokenAmount(token, balance.toString())) | ||
| } | ||
|
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| export function useTokenAllowance(token?: Token, owner?: string, spender?: string): TokenAmount { | ||
| export function useTokenAllowance(token?: Token, owner?: string, spender?: string): TokenAmount | undefined { | ||
| const contract = useTokenContract(token?.address, false) | ||
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| const shouldFetch = !!contract && typeof owner === 'string' && typeof spender === 'string' | ||
| const { data, mutate } = useSWR( | ||
| shouldFetch ? [owner, spender, token.address, token.chainId, SWRKeys.Allowances] : null, | ||
| getTokenAllowance(contract, token) | ||
| ) | ||
| useKeepSWRDataLiveAsBlocksArrive(mutate) | ||
| const inputs = useMemo(() => [owner, spender], [owner, spender]) | ||
| const allowance = useSingleCallResult(contract, 'allowance', inputs) | ||
|
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| return data | ||
| return useMemo(() => (token && allowance ? new TokenAmount(token, allowance.toString()) : undefined), [ | ||
| token, | ||
| allowance | ||
| ]) | ||
| } |
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