mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-12-23 09:52:26 +01:00
b6ccd22d6c
Co-authored-by: Mark Stacey <markjstacey@gmail.com>
74 lines
2.7 KiB
JavaScript
74 lines
2.7 KiB
JavaScript
import namehash from 'eth-ens-namehash'
|
|
import Eth from 'ethjs-query'
|
|
import EthContract from 'ethjs-contract'
|
|
import contentHash from 'content-hash'
|
|
import registryAbi from './contracts/registry'
|
|
import resolverAbi from './contracts/resolver'
|
|
|
|
export default async function resolveEnsToIpfsContentId ({ provider, name }) {
|
|
const eth = new Eth(provider)
|
|
const hash = namehash.hash(name)
|
|
const contract = new EthContract(eth)
|
|
// lookup registry
|
|
const chainId = Number.parseInt(await eth.net_version(), 10)
|
|
const registryAddress = getRegistryForChainId(chainId)
|
|
if (!registryAddress) {
|
|
throw new Error(`EnsIpfsResolver - no known ens-ipfs registry for chainId "${chainId}"`)
|
|
}
|
|
const Registry = contract(registryAbi).at(registryAddress)
|
|
// lookup resolver
|
|
const resolverLookupResult = await Registry.resolver(hash)
|
|
const resolverAddress = resolverLookupResult[0]
|
|
if (hexValueIsEmpty(resolverAddress)) {
|
|
throw new Error(`EnsIpfsResolver - no resolver found for name "${name}"`)
|
|
}
|
|
const Resolver = contract(resolverAbi).at(resolverAddress)
|
|
|
|
const isEIP1577Compliant = await Resolver.supportsInterface('0xbc1c58d1')
|
|
const isLegacyResolver = await Resolver.supportsInterface('0xd8389dc5')
|
|
if (isEIP1577Compliant[0]) {
|
|
const contentLookupResult = await Resolver.contenthash(hash)
|
|
const rawContentHash = contentLookupResult[0]
|
|
let decodedContentHash = contentHash.decode(rawContentHash)
|
|
const type = contentHash.getCodec(rawContentHash)
|
|
|
|
if (type === 'ipfs-ns' || type === 'ipns-ns') {
|
|
decodedContentHash = contentHash.helpers.cidV0ToV1Base32(decodedContentHash)
|
|
}
|
|
|
|
return { type, hash: decodedContentHash }
|
|
}
|
|
if (isLegacyResolver[0]) {
|
|
// lookup content id
|
|
const contentLookupResult = await Resolver.content(hash)
|
|
const content = contentLookupResult[0]
|
|
if (hexValueIsEmpty(content)) {
|
|
throw new Error(`EnsIpfsResolver - no content ID found for name "${name}"`)
|
|
}
|
|
return { type: 'swarm-ns', hash: content.slice(2) }
|
|
}
|
|
throw new Error(`EnsIpfsResolver - the resolver for name "${name}" is not standard, it should either supports contenthash() or content()`)
|
|
}
|
|
|
|
function hexValueIsEmpty (value) {
|
|
return [undefined, null, '0x', '0x0', '0x0000000000000000000000000000000000000000000000000000000000000000'].includes(value)
|
|
}
|
|
|
|
/**
|
|
* Returns the registry address for the given chain ID
|
|
* @param {number} chainId the chain ID
|
|
* @returns {string|null} the registry address if known, null otherwise
|
|
*/
|
|
function getRegistryForChainId (chainId) {
|
|
switch (chainId) {
|
|
case 1:
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
// Mainnet, Ropsten, Rinkeby, and Goerli, respectively, use the same address
|
|
return '0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e'
|
|
default:
|
|
return null
|
|
}
|
|
}
|