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Merge pull request #1 from scio-labs/feat/azero-offchain-resolver
AzeroID off-chain resolver implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| NETWORK=sepolia | ||
| REMOTE_GATEWAY= | ||
| DEPLOYER_KEY= | ||
| SIGNER_ADDR= | ||
| INFURA_ID= | ||
| ETHERSCAN_API_KEY= |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| #!/usr/bin/env bash | ||
| set -eu | ||
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| # Can only be overwritten from the .env file, not from the command line! | ||
| NETWORK=sepolia | ||
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| # Load .env | ||
| source .env | ||
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| # Deploy OffchainResolver | ||
| npx hardhat --network $NETWORK deploy --tags demo |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| import abi from './metadata.json'; | ||
| import { ApiPromise, WsProvider } from '@polkadot/api'; | ||
| import { Database } from './server'; | ||
| import { ContractPromise } from '@polkadot/api-contract'; | ||
| import type { WeightV2 } from '@polkadot/types/interfaces'; | ||
| import { getCoderByCoinType } from "@ensdomains/address-encoder"; | ||
| import { createDotAddressDecoder } from '@ensdomains/address-encoder/utils' | ||
| import { hexlify } from 'ethers/lib/utils'; | ||
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| const AZERO_COIN_TYPE = 643; | ||
| const ZERO_ADDRESS = '0x0000000000000000000000000000000000000000'; | ||
| const EMPTY_CONTENT_HASH = '0x'; | ||
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| export interface GasLimit { | ||
| refTime: number, | ||
| proofSize: number, | ||
| } | ||
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| export class AzeroId implements Database { | ||
| ttl: number; | ||
| tldToContract: Map<string, ContractPromise>; | ||
| maxGasLimit: WeightV2; | ||
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| constructor(ttl: number, tldToContract: Map<string, ContractPromise>, maxGasLimit: WeightV2) { | ||
| this.ttl = ttl; | ||
| this.tldToContract = tldToContract; | ||
| this.maxGasLimit = maxGasLimit; | ||
| } | ||
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| static async init(ttl: number, providerURL: string, tldToContractAddress: Map<string, string>, gasLimit: GasLimit) { | ||
| const wsProvider = new WsProvider(providerURL); | ||
| const api = await ApiPromise.create({ provider: wsProvider }); | ||
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| const tldToContract = new Map<string, ContractPromise>(); | ||
| tldToContractAddress.forEach((addr, tld) => { | ||
| tldToContract.set(tld, new ContractPromise(api, abi, addr)) | ||
| }) | ||
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| const maxGasLimit = api.registry.createType('WeightV2', gasLimit) as WeightV2; | ||
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| return new AzeroId( | ||
| ttl, | ||
| tldToContract, | ||
| maxGasLimit, | ||
| ); | ||
| } | ||
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| async addr(name: string, coinType: number) { | ||
| coinType = Number(coinType); // convert BigNumber to number | ||
| console.log("addr", name, coinType); | ||
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| let value; | ||
| if (coinType == AZERO_COIN_TYPE) { | ||
| value = await this.fetchA0ResolverAddress(name); | ||
| } else { | ||
| let alias = AzeroId.getAlias(""+coinType); | ||
| if (alias !== undefined) { | ||
| const serviceKey = "address." + alias; | ||
| value = await this.fetchRecord(name, serviceKey); | ||
| } | ||
| if (value === undefined) { | ||
| const serviceKey = "address." + coinType; | ||
| value = await this.fetchRecord(name, serviceKey); | ||
| } | ||
| } | ||
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| if (value === undefined) { | ||
| value = coinType == 60? ZERO_ADDRESS:'0x'; | ||
| } else { | ||
| value = AzeroId.encodeAddress(value, coinType); | ||
| } | ||
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| return { addr: value, ttl: this.ttl }; | ||
| } | ||
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| async text(name: string, key: string) { | ||
| console.log("text", name, key); | ||
| const value = await this.fetchRecord(name, key) || ''; | ||
| return { value, ttl: this.ttl }; | ||
| } | ||
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| contenthash(name: string) { | ||
| console.log("contenthash", name); | ||
| return { contenthash: EMPTY_CONTENT_HASH, ttl: this.ttl }; | ||
| } | ||
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| private async fetchRecord(domain: string, key: string) { | ||
| let {name, contract} = this.processName(domain); | ||
| const resp: any = await contract.query.getRecord( | ||
| '', | ||
| { | ||
| gasLimit: this.maxGasLimit | ||
| }, | ||
| name, | ||
| key | ||
| ); | ||
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| return resp.output?.toHuman().Ok.Ok; | ||
| } | ||
|
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| private async fetchA0ResolverAddress(domain: string) { | ||
| let {name, contract} = this.processName(domain); | ||
| const resp: any = await contract.query.getAddress( | ||
| '', | ||
| { | ||
| gasLimit: this.maxGasLimit | ||
| }, | ||
| name | ||
| ); | ||
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| return resp.output?.toHuman().Ok.Ok; | ||
| } | ||
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| private processName(domain: string) { | ||
| const labels = domain.split('.'); | ||
| console.log("Labels:", labels); | ||
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| const name = labels.shift() || ''; | ||
| const tld = labels.join('.'); | ||
| const contract = this.tldToContract.get(tld); | ||
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| if (contract === undefined) { | ||
| throw new Error(`TLD (.${tld}) not supported`); | ||
| } | ||
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| return {name, contract}; | ||
| } | ||
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| static getAlias(coinType: string) { | ||
| const alias = new Map<string, string>([ | ||
| ['0', 'btc'], | ||
| ['60', 'eth'], | ||
| ['354', 'dot'], | ||
| ['434', 'ksm'], | ||
| ['501', 'sol'], | ||
| ]); | ||
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| return alias.get(coinType); | ||
| } | ||
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| static encodeAddress(addr: string, coinType: number) { | ||
| const isEvmCoinType = (c: number) => { | ||
| return c == 60 || (c & 0x80000000)!=0 | ||
| } | ||
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| if (coinType == AZERO_COIN_TYPE) { | ||
| const azeroCoder = createDotAddressDecoder(42); | ||
| return hexlify(azeroCoder(addr)); | ||
| } | ||
| if (isEvmCoinType(coinType) && !addr.startsWith('0x')) { | ||
| addr = '0x' + addr; | ||
| } | ||
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| try { | ||
| const coder = getCoderByCoinType(coinType); | ||
| return hexlify(coder.decode(addr)); | ||
| } catch { | ||
| return addr; | ||
| } | ||
| } | ||
| } |
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