1import {ApiPromise, WsProvider} from '@polkadot/api';2import {blake2AsHex} from '@polkadot/util-crypto';3import {readFileSync} from 'fs';45async function main() {6 const networkUrl = process.argv[2];7 const wasmFile = process.argv[3];89 const wsProvider = new WsProvider(networkUrl);10 const api = await ApiPromise.create({provider: wsProvider});1112 const wasmFileBytes = readFileSync(wasmFile);13 const wasmFileHash = blake2AsHex(wasmFileBytes, 256);1415 const authorizeUpgrade = api.tx.parachainSystem.authorizeUpgrade(wasmFileHash, true);1617 const councilMembers = (await api.query.council.members()).toJSON() as any[];18 const councilProposalThreshold = Math.floor(councilMembers.length / 2) + 1;1920 const democracyProposal = api.tx.democracy.externalProposeDefault({21 Inline: authorizeUpgrade.method.toHex(),22 });2324 const councilProposal = api.tx.council.propose(25 councilProposalThreshold,26 democracyProposal,27 democracyProposal.method.encodedLength,28 );2930 const encodedCall = councilProposal.method.toHex();3132 console.log('-----------------');33 console.log('Upgrade Proposal: ', `https://polkadot.js.org/apps/?rpc=${networkUrl}#/extrinsics/decode/${encodedCall}`);34 console.log('-----------------');3536 await api.disconnect();37}3839await main();