vote-for-proposal-drep-script-example.ts

/**
 * Copyright 2025 Biglup Labs.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* IMPORTS ********************************************************************/

import * as Cometa from '@biglup/cometa';
import { TaskResult, TerminalProgressMonitor, getBlockfrostProjectIdFromEnv, getPassword, printHeader } from './utils';

/* CONSTANTS ******************************************************************/

const ANCHOR = {
  dataHash: '26ce09df4e6f64fe5cf248968ab78f4b8a0092580c234d78f68c079c0fce34f0',
  url: 'https://storage.googleapis.com/biglup/Angel_Castillo.jsonld'
};

const ALWAYS_SUCCEEDS_SCRIPT_V3 =
  '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const MNEMONICS =
  'antenna whale clutch cushion narrow chronic matrix alarm raise much stove beach mimic daughter review build dinner twelve orbit soap decorate bachelor athlete close';

/* DEFINITIONS ****************************************************************/

const monitor = new TerminalProgressMonitor();

/**
 * Signs and submits a transaction using Cometa.
 * @param wallet Cometa.Wallet instance to sign the transaction.
 * @param provider Cometa.Provider instance to submit the transaction and confirm it.
 * @param unsignedTx The unsigned transaction in CBOR format as a string.
 */
const signAndSubmit = async (wallet: Cometa.Wallet, provider: Cometa.Provider, unsignedTx: string) => {
  monitor.logInfo('Signing transaction...');
  const witnessSet = await wallet.signTransaction(unsignedTx, true);
  const signedTx = Cometa.applyVkeyWitnessSet(unsignedTx, witnessSet);

  monitor.logInfo('Signed transaction:');
  monitor.logInfo(JSON.stringify(Cometa.inspectTx(signedTx), null, 2));

  monitor.startTask('Submitting transaction...');
  const txId = await wallet.submitTransaction(signedTx);
  monitor.endTask(`Transaction submitted successfully with ID: ${txId}`, TaskResult.Success);

  monitor.startTask('Confirming transaction...');
  const confirmed = await provider.confirmTransaction(txId, 90000);
  if (confirmed) {
    monitor.endTask('Transaction confirmed successfully.', TaskResult.Success);
  } else {
    monitor.endTask('Transaction confirmation failed.', TaskResult.Fail);
  }
};

/**
 * Registers a DRep using Cometa.
 * This function builds a transaction to register a DRep with the specified drepId,
 * signs it, submits it, and confirms the transaction.
 *
 * @param {Cometa.Wallet} wallet - The Cometa wallet instance.
 * @param {Cometa.Provider} provider - The Cometa provider instance.
 * @param {Cometa.Script} script - The Plutus script to be used for the DRep registration.
 * @param {Cometa.PlutusData} redeemer - The redeemer data for the DRep registration.
 * @param {string} drepId - The ID of the DRep to register.
 */
const registerDRep = async (
  wallet: Cometa.Wallet,
  provider: Cometa.Provider,
  script: Cometa.Script,
  redeemer: Cometa.PlutusData,
  drepId: string
) => {
  monitor.startTask('Registering DRep...');
  const builder = await wallet.createTransactionBuilder();

  const unsignedTx = await builder.registerDRep({ anchor: ANCHOR, drepId, redeemer }).addScript(script).build();

  monitor.endTask('Register DRep transaction built successfully.', TaskResult.Success);
  await signAndSubmit(wallet, provider, unsignedTx);
};

/**
 * Deregisters a DRep using Cometa.
 *
 * @param {Cometa.Wallet} wallet - The Cometa wallet instance.
 * @param {Cometa.Provider} provider - The Cometa provider instance.
 * @param {Cometa.Script} script - The Plutus script to be used for the DRep registration.
 * @param {Cometa.PlutusData} redeemer - The redeemer data for the DRep registration.
 * @param {string} drepId - The ID of the DRep to register.
 */
const deregisterDRep = async (
  wallet: Cometa.Wallet,
  provider: Cometa.Provider,
  script: Cometa.Script,
  redeemer: Cometa.PlutusData,
  drepId: string
) => {
  monitor.startTask('Deregistering DRep...');
  const builder = await wallet.createTransactionBuilder();

  const unsignedTx = await builder.deregisterDRep({ drepId, redeemer }).addScript(script).build();

  monitor.endTask('Deregistering DRep transaction built successfully.', TaskResult.Success);
  await signAndSubmit(wallet, provider, unsignedTx);
};

/**
 * Cast a vote for the given proposal as dRep.
 *
 * @param {Cometa.Wallet} wallet - The Cometa wallet instance.
 * @param {Cometa.Provider} provider - The Cometa provider instance.
 * @param actionId - The ID of the governance action to vote on.
 * @param voter - The voter object containing the credential and type.
 * @param votingProcedure - The voting procedure object containing the anchor and vote.
 * @param {Cometa.Script} script - The Plutus script to be used for the DRep registration.
 * @param {Cometa.PlutusData} redeemer - The redeemer data for the DRep registration.
 */
const voteAsDrep = async (
  wallet: Cometa.Wallet,
  provider: Cometa.Provider,
  actionId: Cometa.GovernanceActionId | string,
  voter: Cometa.Voter,
  votingProcedure: Cometa.VotingProcedure,
  script: Cometa.Script,
  redeemer: Cometa.PlutusData
  // eslint-disable-next-line max-params
) => {
  monitor.startTask('Voting as DRep...');
  const builder = await wallet.createTransactionBuilder();

  const unsignedTx = await builder
    .vote({
      actionId,
      redeemer,
      voter,
      votingProcedure
    })
    .addScript(script)
    .build();

  monitor.endTask('Voting transaction built successfully.', TaskResult.Success);
  await signAndSubmit(wallet, provider, unsignedTx);
};

/**
 * Example of registering a DRep, voting, and deregistering the DRep.
 */
const example = async () => {
  await Cometa.ready();

  printHeader('Vote for proposal as a DRep (Script Hash)', 'This example votes for a proposal as a Script Hash DRep.');

  const provider = new Cometa.BlockfrostProvider({
    network: Cometa.NetworkMagic.Preprod,
    projectId: getBlockfrostProjectIdFromEnv() // Reads from env variable BLOCKFROST_PROJECT_ID
  });

  monitor.logInfo('Creating wallet from mnemonics...');
  const wallet = await Cometa.SingleAddressWallet.createFromMnemonics({
    credentialsConfig: {
      account: 0,
      paymentIndex: 0,
      stakingIndex: 0
    },
    getPassword,
    mnemonics: MNEMONICS.split(' '),
    provider
  });

  const script = {
    type: Cometa.ScriptType.Plutus,
    bytes: ALWAYS_SUCCEEDS_SCRIPT_V3,
    version: Cometa.PlutusLanguageVersion.V3
  } as Cometa.Script;

  const redeemer: Cometa.ConstrPlutusData = {
    cbor: 'd87980',
    constructor: 0n,
    fields: { items: [] }
  };

  const drepId = Cometa.cip129DRepFromScript(script);
  monitor.logInfo(`DRep ID: ${drepId}`);

  // Created by https://preprod.cardanoscan.io/transaction/e1d1d4a310b4b500310e0433eeb70fb96b13ee91a7d05f605861a6b8618ef269?tab=govActions
  const govActionId = Cometa.govActionIdFromBech32(
    'gov_action1u8gafgcskj6sqvgwqse7adc0h9438m535lg97czcvxntscvw7f5sqgf2n7j'
  );
  const voter = {
    credential: Cometa.dRepToCredential(drepId),
    type: Cometa.VoterType.DRepScriptHash
  };
  const votingProcedure = {
    anchor: ANCHOR,
    vote: Cometa.Vote.Yes
  };

  await registerDRep(wallet, provider, script, redeemer, drepId);
  await voteAsDrep(wallet, provider, govActionId, voter, votingProcedure, script, redeemer);
  await deregisterDRep(wallet, provider, script, redeemer, drepId);
};

example().catch((error) => monitor.logFailure(`Error in example: ${error.message}`));