34 lines
821 B
JavaScript
34 lines
821 B
JavaScript
/* CONTRACT NAMER
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*
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* Takes an address,
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* Returns a nicname if we have one stored,
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* otherwise returns null.
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*/
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const contractMap = require('eth-contract-metadata')
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const ethUtil = require('ethereumjs-util')
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module.exports = function (addr, identities = {}) {
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const checksummed = ethUtil.toChecksumAddress(addr)
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if (contractMap[checksummed] && contractMap[checksummed].name) {
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return contractMap[checksummed].name
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}
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const address = addr.toLowerCase()
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const ids = hashFromIdentities(identities)
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return addrFromHash(address, ids)
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}
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function hashFromIdentities (identities) {
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const result = {}
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for (const key in identities) {
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result[key] = identities[key].name
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}
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return result
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}
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function addrFromHash (addr, hash) {
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const address = addr.toLowerCase()
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return hash[address] || null
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}
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