@ceramicnetwork/blockchain-utils-linking/lib/polkadot.js

Blockchain utils for linking blockchain accounts to DID

import { AccountId } from 'caip';
import { asOldCaipString, getConsentMessage } from './util.js';
import * as uint8arrays from 'uint8arrays';
const stringHex = (str) => `0x${uint8arrays.toString(uint8arrays.fromString(str), 'base16')}`;
const CHAIN_ID = 'polkadot:b0a8d493285c2df73290dfb7e61f870f';
export class PolkadotAuthProvider {
    constructor(provider, address) {
        this.provider = provider;
        this.address = address;
        this.isAuthProvider = true;
        console.warn('WARN: PolkadotAuthProvider is not fully supported. You may encounter issues using this.');
    }
    async authenticate(message) {
        throw new Error(`Not Implemented: PolkadotAuthProvider#authenticate, ${message}`);
    }
    async createLink(did) {
        const { message, timestamp } = getConsentMessage(did);
        const linkMessageHex = stringHex(message);
        const account = await this.accountId();
        const res = await this.provider.signRaw({
            address: this.address,
            data: linkMessageHex,
            type: 'bytes',
        });
        return {
            version: 2,
            type: 'eoa',
            message: message,
            signature: res.signature,
            account: asOldCaipString(account),
            timestamp: timestamp,
        };
    }
    async accountId() {
        return new AccountId({ address: this.address, chainId: CHAIN_ID });
    }
    withAddress(address) {
        return new PolkadotAuthProvider(this.provider, address);
    }
}
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