1import {ApiPromise, WsProvider} from '@polkadot/api';2import {blake2AsHex} from '@polkadot/util-crypto';3import {readFileSync} from 'fs';45async function main() {6 if(process.argv.length != 4) {7 console.log('Usage: proposeUpgrade <CHAIN_URL> <WASM_FILE_PATH>');8 process.exit(1);9 }1011 const networkUrl = process.argv[2];12 const wasmFile = process.argv[3];1314 const wsProvider = new WsProvider(networkUrl);15 const api = await ApiPromise.create({provider: wsProvider});1617 const wasmFileBytes = readFileSync(wasmFile);18 const wasmFileHash = blake2AsHex(wasmFileBytes, 256);1920 const authorizeUpgrade = api.tx.parachainSystem.authorizeUpgrade(wasmFileHash, true);21 const enableMaintenance = api.tx.maintenance.enable();2223 const councilMembers = (await api.query.council.members()).toJSON() as any[];24 const councilProposalThreshold = Math.floor(councilMembers.length / 2) + 1;2526 const democracyProposalContent = api.tx.utility.batchAll([27 authorizeUpgrade.method.toHex(),28 enableMaintenance.method.toHex(),29 ]).method.toHex();3031 const democracyProposalHash = blake2AsHex(democracyProposalContent, 256);32 const democracyProposalPreimage = api.tx.preimage.notePreimage(democracyProposalContent).method.toHex();3334 const democracyProposal = api.tx.democracy.externalProposeDefault({35 Legacy: democracyProposalHash,36 });3738 const councilProposal = api.tx.council.propose(39 councilProposalThreshold,40 democracyProposal,41 democracyProposal.method.encodedLength,42 ).method.toHex();4344 const proposeUpgradeBatch = api.tx.utility.batchAll([45 democracyProposalPreimage,46 councilProposal,47 ]);4849 const encodedCall = proposeUpgradeBatch.method.toHex();5051 console.log('-----------------');52 console.log('Upgrade Proposal: ', `https://polkadot.js.org/apps/?rpc=${networkUrl}#/extrinsics/decode/${encodedCall}`);53 console.log('-----------------');5455 await api.disconnect();56}5758await main();