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

Blockchain utils for linking blockchain accounts to DID

import { AccountId } from 'caip';
import { asOldCaipString, getConsentMessage } from './util.js';
import * as uint8arrays from 'uint8arrays';
export class FilecoinAuthProvider {
    constructor(provider, address) {
        this.provider = provider;
        this.address = address;
        this.isAuthProvider = true;
        console.warn('WARN: FilecoinAuthProvider is not fully supported. You may encounter issues using this.');
    }
    async accountId() {
        const prefix = this.address[0];
        const chainId = `fil:${prefix}`;
        return new AccountId({ address: this.address, chainId });
    }
    async authenticate(message) {
        const payload = asTransaction(this.address, JSON.stringify(message));
        const signatureResponse = await this.provider.sign(this.address, payload);
        return signatureResponse.Signature.Data;
    }
    async createLink(did) {
        const { message, timestamp } = getConsentMessage(did, true);
        const payload = asTransaction(this.address, message);
        const signatureResponse = await this.provider.sign(this.address, payload);
        const accountId = await this.accountId();
        return {
            version: 2,
            type: 'eoa-tx',
            message: message,
            signature: signatureResponse.Signature.Data,
            account: asOldCaipString(accountId),
            timestamp: timestamp,
        };
    }
    withAddress(address) {
        return new FilecoinAuthProvider(this.provider, address);
    }
}
export function asTransaction(address, message) {
    const messageParams = uint8arrays.toString(uint8arrays.fromString(message), 'base64');
    return {
        From: address,
        To: address,
        Value: '0',
        Method: 0,
        GasPrice: '1',
        GasLimit: 1000,
        Nonce: 0,
        Params: messageParams,
        GasFeeCap: '1',
        GasPremium: '1',
    };
}
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