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Original file line number | Diff line number | Diff line change |
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import 'dotenv/config'; | ||
const { | ||
INFURA_KEY, | ||
QUICKNODE_KEY | ||
} = process.env; | ||
|
||
const configs = { | ||
mainnet: { | ||
url: 'https://mainnet.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
sepolia: { | ||
url: 'https://sepolia.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
polygon: { | ||
url: 'https://polygon-mainnet.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
optimism: { | ||
url: 'https://optimism-mainnet.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
base: { | ||
url: 'https://fluent-prettiest-scion.base-mainnet.quiknode.pro/' + QUICKNODE_KEY, | ||
}, | ||
arbitrum: { | ||
url: 'https://arbitrum-mainnet.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
avalanche: { | ||
url: 'https://api.avax.network/ext/bc/C/rpc', | ||
}, | ||
fuji: { | ||
url: 'https://api.avax-test.network/ext/bc/C/rpc', | ||
}, | ||
mumbai: { | ||
url: 'https://polygon-mumbai.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
arbitrumGoerli: { | ||
url: 'https://arbitrum-goerli.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
baseGoerli: { | ||
url: 'https://goerli.base.org/', | ||
}, | ||
lineaGoerli: { | ||
url: 'https://linea-goerli.infura.io/v3/' + INFURA_KEY, | ||
}, | ||
scrollGoerli: { | ||
url: 'https://alpha-rpc.scroll.io/l2', | ||
}, | ||
scroll: { | ||
url: 'https://rpc.scroll.io', | ||
} | ||
}; | ||
|
||
export async function getSymbol( | ||
address: string, | ||
network: string | ||
) : Promise<string> { | ||
const link = configs[network].url; | ||
try { | ||
const response = await fetch(link, { | ||
method: 'POST', | ||
headers: { | ||
'Content-Type': 'application/json' | ||
}, | ||
body: JSON.stringify({ | ||
jsonrpc: '2.0', | ||
method: 'eth_call', | ||
params: [ | ||
{ | ||
to: address, | ||
data: '0x95d89b41' | ||
}, | ||
'latest' | ||
], | ||
id: 1 | ||
}) | ||
}); | ||
|
||
const data = await response.json(); | ||
if(data.result.length <= 2) { | ||
throw new Error('Error fetching symbol from address: ' + address); | ||
} | ||
const hexString = data.result.slice(2); | ||
const relevantHex = hexString.slice(64); | ||
const lengthHex = relevantHex.slice(0, 64); | ||
const length = parseInt(lengthHex, 16); | ||
const stringHex = relevantHex.slice(64, 64 + length * 2); | ||
const bytes = new Uint8Array(stringHex.match(/.{1,2}/g).map((byte: string) => parseInt(byte, 16))); | ||
const symbol = new TextDecoder().decode(bytes); | ||
return(symbol); | ||
} catch (error) { | ||
throw new Error('Error fetching symbol: ' + error); | ||
} | ||
} |