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Some random etherscan/uniswap code
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| const apiKeys = {etherscan:'GCGR1C9I17TYIRNYUDDEIJH1K5BRPH4UDE'} // EtherDelta's API key | |
| const apiKey = (document.URL||'').includes('etherscan.io') ? 'YourApiKeyToken' : apiKeys.etherscan; | |
| const uniswap = {factory:'0xc0a47dfe034b400b47bdad5fecda2621de6c4d95'}; | |
| const factoryAddress = uniswap.factory; | |
| function select(n) {return x => x[n]} | |
| function addrId(a) {const x=4, y=3, z=2; return `${a.substr(z,x+z)}:${a.substr(a.length-y)}`} | |
| function topicToAddr(n) {return logEvent => '0x'+logEvent.topics[n].substring(logEvent.topics[n].length-40)} | |
| function topicToAddrId(n) {return addrId(topicToAddr(n))} | |
| function savePromiseToLocalStorage(name) {return x => {x && localStorage.setItem(name, JSON.stringify(x)); return x}} | |
| function parseBytesString(s) {const str=[];for(i=0; i<s.length; i+=2) {str.push(String.fromCharCode('0x'+s.substring(i,i+2)));} return str.join('')} | |
| function chainPromises(promises=[]) { | |
| return promises.reduce((chain, current) => | |
| chain.then(results=>current.then(result=>[...results, result])), Promise.resolve([])) | |
| } | |
| function getCachedOr(name, f) { | |
| return Promise.resolve(localStorage.getItem(name)) | |
| .then(cached => {return cached ? JSON.parse(cached) : f().then(savePromiseToLocalStorage(name))}) | |
| } | |
| function getDelayed({ storageKey, fetchData }, force=false, waitMs=100) { | |
| return force ? new Promise((resolve,reject) => { | |
| setTimeout(forced=>{try {resolve(fetchData(forced));} catch(error) {reject(error);}}, waitMs) | |
| }) | |
| .catch(err=>{getDelayed({storageKey, fetchData}, false, waitMs*10).catch()}) | |
| .then(savePromiseToLocalStorage(storageKey)) : | |
| getCachedOr(storageKey, ()=>getDelayed({ storageKey, fetchData }, true, waitMs)) | |
| } | |
| const basicTokenInfo = web3.eth.contract([{"constant": true,"inputs": [],"name": "name","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [],"name": "totalSupply","outputs": [{"name": "","type": "uint256"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [],"name": "decimals","outputs": [{"name": "","type": "uint256"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [{"name": "","type": "address"}],"name": "balanceOf","outputs": [{"name": "","type": "uint256"}],"payable": false,"stateMutability": "view","type": "function"},{"constant": true,"inputs": [],"name": "symbol","outputs": [{"name": "","type": "string"}],"payable": false,"stateMutability": "view","type": "function"}]); | |
| const dsTokenContract = web3.eth.contract([{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"stop","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"owner_","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"mint","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint256"}],"name":"burn","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"name_","type":"bytes32"}],"name":"setName","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"stopped","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"authority_","type":"address"}],"name":"setAuthority","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"},{"name":"wad","type":"uint256"}],"name":"burn","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"wad","type":"uint256"}],"name":"mint","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"push","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"dst","type":"address"},{"name":"wad","type":"uint256"}],"name":"move","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"start","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"authority","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"guy","type":"address"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"src","type":"address"},{"name":"guy","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"src","type":"address"},{"name":"wad","type":"uint256"}],"name":"pull","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"symbol_","type":"bytes32"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"guy","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"guy","type":"address"},{"indexed":false,"name":"wad","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"authority","type":"address"}],"name":"LogSetAuthority","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"}],"name":"LogSetOwner","type":"event"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]); | |
| const exchangeContract = web3.eth.contract([{"name": "TokenPurchase", "inputs": [{"type": "address", "name": "buyer", "indexed": true}, {"type": "uint256", "name": "eth_sold", "indexed": true}, {"type": "uint256", "name": "tokens_bought", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "EthPurchase", "inputs": [{"type": "address", "name": "buyer", "indexed": true}, {"type": "uint256", "name": "tokens_sold", "indexed": true}, {"type": "uint256", "name": "eth_bought", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "AddLiquidity", "inputs": [{"type": "address", "name": "provider", "indexed": true}, {"type": "uint256", "name": "eth_amount", "indexed": true}, {"type": "uint256", "name": "token_amount", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "RemoveLiquidity", "inputs": [{"type": "address", "name": "provider", "indexed": true}, {"type": "uint256", "name": "eth_amount", "indexed": true}, {"type": "uint256", "name": "token_amount", "indexed": true}], "anonymous": false, "type": "event"}, {"name": "Transfer", "inputs": [{"type": "address", "name": "_from", "indexed": true}, {"type": "address", "name": "_to", "indexed": true}, {"type": "uint256", "name": "_value", "indexed": false}], "anonymous": false, "type": "event"}, {"name": "Approval", "inputs": [{"type": "address", "name": "_owner", "indexed": true}, {"type": "address", "name": "_spender", "indexed": true}, {"type": "uint256", "name": "_value", "indexed": false}], "anonymous": false, "type": "event"}, {"name": "setup", "outputs": [], "inputs": [{"type": "address", "name": "token_addr"}], "constant": false, "payable": false, "type": "function", "gas": 175875}, {"name": "addLiquidity", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "min_liquidity"}, {"type": "uint256", "name": "max_tokens"}, {"type": "uint256", "name": "deadline"}], "constant": false, "payable": true, "type": "function", "gas": 82616}, {"name": "removeLiquidity", "outputs": [{"type": "uint256", "name": "out"}, {"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "amount"}, {"type": "uint256", "name": "min_eth"}, {"type": "uint256", "name": "min_tokens"}, {"type": "uint256", "name": "deadline"}], "constant": false, "payable": false, "type": "function", "gas": 116814}, {"name": "__default__", "outputs": [], "inputs": [], "constant": false, "payable": true, "type": "function"}, {"name": "ethToTokenSwapInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "min_tokens"}, {"type": "uint256", "name": "deadline"}], "constant": false, "payable": true, "type": "function", "gas": 12757}, {"name": "ethToTokenTransferInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "min_tokens"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}], "constant": false, "payable": true, "type": "function", "gas": 12965}, {"name": "ethToTokenSwapOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}, {"type": "uint256", "name": "deadline"}], "constant": false, "payable": true, "type": "function", "gas": 50463}, {"name": "ethToTokenTransferOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}], "constant": false, "payable": true, "type": "function", "gas": 50671}, {"name": "tokenToEthSwapInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}, {"type": "uint256", "name": "min_eth"}, {"type": "uint256", "name": "deadline"}], "constant": false, "payable": false, "type": "function", "gas": 47503}, {"name": "tokenToEthTransferInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}, {"type": "uint256", "name": "min_eth"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}], "constant": false, "payable": false, "type": "function", "gas": 47712}, {"name": "tokenToEthSwapOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "eth_bought"}, {"type": "uint256", "name": "max_tokens"}, {"type": "uint256", "name": "deadline"}], "constant": false, "payable": false, "type": "function", "gas": 50175}, {"name": "tokenToEthTransferOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "eth_bought"}, {"type": "uint256", "name": "max_tokens"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}], "constant": false, "payable": false, "type": "function", "gas": 50384}, {"name": "tokenToTokenSwapInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}, {"type": "uint256", "name": "min_tokens_bought"}, {"type": "uint256", "name": "min_eth_bought"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "token_addr"}], "constant": false, "payable": false, "type": "function", "gas": 51007}, {"name": "tokenToTokenTransferInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}, {"type": "uint256", "name": "min_tokens_bought"}, {"type": "uint256", "name": "min_eth_bought"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}, {"type": "address", "name": "token_addr"}], "constant": false, "payable": false, "type": "function", "gas": 51098}, {"name": "tokenToTokenSwapOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}, {"type": "uint256", "name": "max_tokens_sold"}, {"type": "uint256", "name": "max_eth_sold"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "token_addr"}], "constant": false, "payable": false, "type": "function", "gas": 54928}, {"name": "tokenToTokenTransferOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}, {"type": "uint256", "name": "max_tokens_sold"}, {"type": "uint256", "name": "max_eth_sold"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}, {"type": "address", "name": "token_addr"}], "constant": false, "payable": false, "type": "function", "gas": 55019}, {"name": "tokenToExchangeSwapInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}, {"type": "uint256", "name": "min_tokens_bought"}, {"type": "uint256", "name": "min_eth_bought"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "exchange_addr"}], "constant": false, "payable": false, "type": "function", "gas": 49342}, {"name": "tokenToExchangeTransferInput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}, {"type": "uint256", "name": "min_tokens_bought"}, {"type": "uint256", "name": "min_eth_bought"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}, {"type": "address", "name": "exchange_addr"}], "constant": false, "payable": false, "type": "function", "gas": 49532}, {"name": "tokenToExchangeSwapOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}, {"type": "uint256", "name": "max_tokens_sold"}, {"type": "uint256", "name": "max_eth_sold"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "exchange_addr"}], "constant": false, "payable": false, "type": "function", "gas": 53233}, {"name": "tokenToExchangeTransferOutput", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}, {"type": "uint256", "name": "max_tokens_sold"}, {"type": "uint256", "name": "max_eth_sold"}, {"type": "uint256", "name": "deadline"}, {"type": "address", "name": "recipient"}, {"type": "address", "name": "exchange_addr"}], "constant": false, "payable": false, "type": "function", "gas": 53423}, {"name": "getEthToTokenInputPrice", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "eth_sold"}], "constant": true, "payable": false, "type": "function", "gas": 5542}, {"name": "getEthToTokenOutputPrice", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_bought"}], "constant": true, "payable": false, "type": "function", "gas": 6872}, {"name": "getTokenToEthInputPrice", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "tokens_sold"}], "constant": true, "payable": false, "type": "function", "gas": 5637}, {"name": "getTokenToEthOutputPrice", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "uint256", "name": "eth_bought"}], "constant": true, "payable": false, "type": "function", "gas": 6897}, {"name": "tokenAddress", "outputs": [{"type": "address", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 1413}, {"name": "factoryAddress", "outputs": [{"type": "address", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 1443}, {"name": "balanceOf", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "address", "name": "_owner"}], "constant": true, "payable": false, "type": "function", "gas": 1645}, {"name": "transfer", "outputs": [{"type": "bool", "name": "out"}], "inputs": [{"type": "address", "name": "_to"}, {"type": "uint256", "name": "_value"}], "constant": false, "payable": false, "type": "function", "gas": 75034}, {"name": "transferFrom", "outputs": [{"type": "bool", "name": "out"}], "inputs": [{"type": "address", "name": "_from"}, {"type": "address", "name": "_to"}, {"type": "uint256", "name": "_value"}], "constant": false, "payable": false, "type": "function", "gas": 110907}, {"name": "approve", "outputs": [{"type": "bool", "name": "out"}], "inputs": [{"type": "address", "name": "_spender"}, {"type": "uint256", "name": "_value"}], "constant": false, "payable": false, "type": "function", "gas": 38769}, {"name": "allowance", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [{"type": "address", "name": "_owner"}, {"type": "address", "name": "_spender"}], "constant": true, "payable": false, "type": "function", "gas": 1925}, {"name": "name", "outputs": [{"type": "bytes32", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 1623}, {"name": "symbol", "outputs": [{"type": "bytes32", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 1653}, {"name": "decimals", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 1683}, {"name": "totalSupply", "outputs": [{"type": "uint256", "name": "out"}], "inputs": [], "constant": true, "payable": false, "type": "function", "gas": 1713}]) | |
| function getTotalSupply(token, contract=basicTokenInfo) { | |
| return new Promise((ok,er)=>{ | |
| contract.at(token).totalSupply.call((e,r)=>{if(e) er(e); else ok(r);}) | |
| }) | |
| } | |
| function getTotalSupplyBn(token) { | |
| const N = web3.BigNumber; | |
| return getTotalSupply(token).then(ts=>new N(ts)).then(bn=>{ | |
| return getDecimals(token).then(decimals => (new N(10).pow(-decimals)).mul(bn)) | |
| }) | |
| } | |
| function getDecimals(token, contract=basicTokenInfo) { | |
| return !token || token==='0x0000000000000000000000000000000000000000' ? Promise.resolve(18) : | |
| new Promise((ok,error)=>{ | |
| contract.at(token).decimals.call((e,r)=>{if(e) error(e); else ok(r);}) | |
| }) | |
| } | |
| function getName(token, contract=dsTokenContract) { | |
| return !token || token==='0x0000000000000000000000000000000000000000' ? Promise.resolve('Ether') : | |
| new Promise((ok,error) => { | |
| try{contract.at(token).name.call((e,r)=>{if(e) error(e); else ok(r);})} catch(e) {error(e)} | |
| }).then(name => { | |
| return name && name!=='0x' && | |
| name!=='0x0000000000000000000000000000000000000000000000000000000000000020' ? | |
| name : getName(token, basicTokenInfo) | |
| }).then(name => { | |
| if (name.length!==66) return name | |
| return parseBytesString(name.substring(0,name.indexOf('00')).substring(2)) | |
| }) | |
| } | |
| function getSymbol(token, contract=dsTokenContract) { | |
| return !token || token==='0x0000000000000000000000000000000000000000' ? Promise.resolve('ETH') : | |
| new Promise((ok,error) => { | |
| try{contract.at(token).symbol.call((e,r)=>{if(e) error(e); else ok(r);})} catch(e) {error(e)} | |
| }).then(symbol => { | |
| return symbol && symbol !=='0x' && | |
| symbol!=='0x0000000000000000000000000000000000000000000000000000000000000020' ? | |
| symbol : getSymbol(token, basicTokenInfo) | |
| }).then(symbol => { | |
| if (symbol.length!==66) return symbol | |
| return parseBytesString(symbol.substring(0,symbol.indexOf('00')).substring(2)) | |
| }) | |
| } | |
| function getTokenInfoByIndex(i, force=false, waitMs=100) { | |
| return getExchangeTokenAddresses(force,waitMs) | |
| .then(tokens=>getTokenInfo(tokens[i], force, waitMs)) | |
| } | |
| function getExchangeOfToken(token, force=false, waitMs=100) { | |
| return getUniswapExchangeCreationLogInfo(force,waitMs) | |
| .then(({tokens, exchanges})=>{ | |
| const i = tokens.indexOf(token); | |
| if (i<0) return | |
| const exchange = exchanges[i]; | |
| return { token, exchange } | |
| }); | |
| } | |
| async function getTokenInfo(token, force=false, waitMs=100) { | |
| const id = addrId(token); | |
| const { tokens, exchanges } = await getUniswapExchangeCreationLogInfo(force,waitMs); | |
| const exchange = exchanges[tokens.indexOf(token)]; | |
| const decimals = await getDecimals(token); | |
| const totalSupply = (await getTotalSupplyBn(token)).toFixed(8); | |
| const exchangeSupply = await getExchangeTokenBalance(token); | |
| const symbol = await getSymbol(token); | |
| const name = await getName(token,exchangeContract).catch(()=>getName(token, basicTokenInfo)); | |
| const info = { token, symbol, name, totalSupply, exchangeSupply, decimals, exchange, id }; | |
| localStorage.setItem(id, JSON.stringify(info)) | |
| return info | |
| } | |
| function getEtherscanApi(apiQueryArgs, force=false, waitMs=100) { | |
| const storageKey = 'api.etherscan.io/api?'+apiQueryArgs; | |
| return getDelayed({ storageKey, fetchData }, force, waitMs) | |
| function fetchData() { | |
| return fetch(`https://${storageKey}&apikey=${apiKey}`).then(r=>r.json().then(select('result'))); | |
| } | |
| } | |
| function getUniswapExchangeCreationLogInfo(force=false, waitMs=100) { | |
| const storageKey = 'exchange creation logs'; | |
| return getDelayed({ storageKey, fetchData }, force, waitMs) | |
| function fetchData(forced) { | |
| return getEtherscanApi(`module=logs&action=getLogs&fromBlock=0&toBlock=latest&address=${factoryAddress}&topic0=0x9d42cb017eb05bd8944ab536a8b35bc68085931dd5f4356489801453923953f9`, forced, waitMs) | |
| .then(exchanges => ({ | |
| raw: exchanges, | |
| exchanges: exchanges.map(topicToAddr(2)), | |
| tokens: exchanges.map(topicToAddr(1)), | |
| })) | |
| } | |
| } | |
| function getExchangeAddresses(force=false, waitMs=100) { | |
| const storageKey = 'exchange addresses'; | |
| return getDelayed({ storageKey, fetchData }, force, waitMs) | |
| function fetchData(forced) { | |
| return getUniswapExchangeCreationLogInfo(forced).then(select('exchanges')) | |
| } | |
| } | |
| function getExchangeTokenAddresses(force=false, waitMs=100) { | |
| const storageKey = 'exchange token addresses'; | |
| return getDelayed({ storageKey, fetchData }, force, waitMs) | |
| function fetchData(forced) { | |
| return getUniswapExchangeCreationLogInfo(forced, waitMs).then(select('tokens')) | |
| } | |
| } | |
| async function getExchangeTokenBalance(token, force=false, waitMs=100) { | |
| const symbol = await getSymbol(token); | |
| const exchange = await getExchangeOfToken(token,force,waitMs); | |
| const storageKey = `exchange token balance ${symbol} of ${addrId(exchange)}` | |
| return getDelayed({storageKey, fetchData}, force, waitMs) | |
| function fetchData(forced) { | |
| const queryArgs = `module=account&action=tokenbalance&contractaddress=${token}&address=${exchange}&tag=latest`; | |
| return getEtherscanApi(queryArgs, force, waitMs).then(balance=>{ | |
| // TODO: should this check if greater than the token's totalSupply()? | |
| if (balance || balance==='0') return { token, exchange, balance } | |
| else throw 'token balance fetch failed' | |
| }) | |
| } | |
| } | |
| function getTokenBalance(token, address, force=false, waitMs=100) { | |
| const storageKey = `token balance ${addrId(token)} of ${addrId(address)}` | |
| return getDelayed({storageKey, fetchData}, force, waitMs) | |
| function fetchData(forced) { | |
| const queryArgs = `module=account&action=tokenbalance&contractaddress=${token}&address=${address}&tag=latest`; | |
| return getEtherscanApi(queryArgs, force, waitMs).then(balance=>{ | |
| // TODO: this should check if greater than the token's totalSupply() | |
| //if (new Number(balance) > 10**36) return { token, address, balance: 0} else | |
| if (balance || balance==='0') return { token, address, balance } | |
| else throw 'token balance fetch failed' | |
| }) | |
| } | |
| } | |
| function getExchangeTokenBalances(force=false, waitMs=100) { | |
| const storageKey = 'exchange token balances'; | |
| return getDelayed({ storageKey, fetchData }, force, waitMs) | |
| function fetchData(forced) { | |
| return getUniswapExchangeCreationLogInfo(forced,waitMs) | |
| .then(info=>info.exchanges.map((address,i)=>({ address, token:info.tokens[i] }))) | |
| .then(ia=>chainPromises(ia.map(({address,token})=>getTokenBalance(token,address,forced,waitMs).catch(e=>{})))) | |
| } | |
| } | |
| function getTotalExchangeEthBalances(force=false, waitMs=100) { | |
| const storageKey = 'exchanges total ether balance'; | |
| return getDelayed({ storageKey, fetchData }, force, waitMs) | |
| function fetchData(forced) { | |
| const N = web3.BigNumber; | |
| const Z = new N(0), W = new N(10**-18); | |
| let r = getExchangeAddresses(forced,waitMs).then(fetchBalances); | |
| if (!forced) | |
| r = r.then(savePromiseToLocalStorage('exchange eth balances')); | |
| return r.then(balances=>balances.map(select('balance')).filter(x=>x.balance!=0)) | |
| .then(balances=>W.mul(balances.reduce((p,v)=>p.add(new N(v)),Z))) | |
| } | |
| function fetchBalances(addrs=[]) { | |
| let subset = addrs.slice(0, 20); | |
| return subset.length < 20 ? | |
| fetch20(subset) : | |
| fetch20(subset).then(balances=>fetchBalances(addrs.slice(20)).then(more=>[ ...balances, ...more ])) | |
| } | |
| async function fetch20(a=[]) { | |
| return await getEtherscanApi(`module=account&action=balancemulti&address=${a.join(',')}&tag=latest`) | |
| } | |
| } | |
| function getAllTokenInfos(force=false, waitMs=100) { | |
| return getExchangeTokenAddresses(force, waitMs) | |
| .then(tokens=>chainPromises(tokens.map(t=>getTokenInfo(t, force, waitMs)))) | |
| } | |
| async function getTokenInfoByIndex(i, force=false, waitMs=100) { | |
| await getExchangeAddresses(force,waitMs); | |
| const tokens = await getExchangeTokenAddresses(force,waitMs); | |
| return getTokenInfo(tokens[i], force, waitMs) | |
| } | |
| async function logTotalExchangeEthBalances(force=false, waitMs=100) { | |
| const balances = {ETH: (await getTotalExchangeEthBalances(force,waitMs))}; | |
| console.log(balances); | |
| return balances | |
| } | |
| function getTokenInfoByExchange(address, force=false, waitMs=100) { | |
| return getExchangeAddresses(force, waitMs) | |
| .then(exchanges=>getTokenInfoByIndex(exchanges.indexOf(address), force, waitMs)) | |
| } | |
| function getExchangesWithOver(ether, force=false, waitMs=100) { | |
| return logTotalExchangeEthBalances(force, waitMs) | |
| .then(()=>JSON.parse(localStorage.getItem('exchange eth balances'))) | |
| .then(bs=>bs.filter(x=>0!=x.balance)) | |
| .then(bs=>bs.map(b=>({...b, balance:web3.toBigNumber(b.balance)}))) | |
| .then(bs=>bs.filter(x=>x.balance.gt(ether*10**18))) | |
| .then(bs=>bs.map(b=>({...b, balance: b.balance.toNumber()}))) | |
| .then(bs=>bs.map(async b=>({...b, token: await getTokenInfoByExchange(b.account) }))) | |
| } | |
| function getBytecode(contract) { | |
| return new Promise((ok,er)=>{ | |
| web3.eth.getCode(contract,(e,r)=>{if(e)er(e); else ok(r);}) | |
| }) | |
| } | |
| function onweb3(e,r) {if (e) throw e; console.log(r)} | |
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