@ckb-lumos/common-scripts

Common script implementation for lumos. Includes secp256k1_blake2b lock script, secp256k1_blake160_multisig lock script, dao type script, sudt type script now.

LocktimePool script includes secp256k1_blake160_multisig cells which with locktime in lock args (which args total length is 28 bytes, last 8 bytes is a since format locktime in BigUInt64LE encode) and DAO step2 cells.

common script allows you to transfer capacity from fromInfos to an address. It will use locktime pool cells first by default.

deploy script provides generateDeployWithDataTx, generateDeployWithTypeIdTx and generateUpgradeTypeIdDataTx, these generators help in the process of deploying contracts.

p2pkh scripts generates message for signing P2PKH transaction.

Usage

common script support new lock scripts provided by user, and pw-lock shows how to do it.

Following script will show how to use common script to transfer capacity to another address. secp256k1_blake160, secp256k1_blake160_multisig and locktime_pool script are similar to common, and common maybe a better choose.

const { common } = require('@ckb-lumos/common-scripts');
const { sealTransaction } = require("@ckb-lumos/helpers")
const { Indexer } = require("@ckb-lumos/ckb-indexer")

// We can use Indexer module as cell provider
const indexer = new Indexer("http://127.0.0.1:8114");

const tipHeader = {
  compactTarget: '0x20010000',
  dao: '0x49bfb20771031d556c8480d47f2a290059f0ac7e383b6509006f4a772ed50200',
  epoch: '0xa0006002b18',
  hash: '0x432451e23c26f45eaceeedcc261764d6485ea5c9a204ac55ad755bb8dec9a079',
  nonce: '0x8199548f8a5ac7a0f0caef1620f37b79',
  number: '0x1aef6',
  parentHash: '0x63594a64108f19f6aed53d0dca9ab4075aac4379cb80b2097b0deac8fc16fd3b',
  proposalsHash: '0x0000000000000000000000000000000000000000000000000000000000000000',
  timestamp: '0x172f6b9a4cf',
  transactions_root: '0x282dbadcd49f3e229d997875f37f4e4f19cb4f04fcf762e9639145aaa667b6f8',
  extra_hash: '0x0000000000000000000000000000000000000000000000000000000000000000',
  version: '0x0'
}

const fromInfos = [
  "ckb1qyqwyxfa75whssgkq9ukkdd30d8c7txct0gq5f9mxs",
  {
    R: 0,
    M: 1,
    publicKeyHashes: ["0x36c329ed630d6ce750712a477543672adab57f4c"],
  },
]

let txSkeleton = TransactionSkeleton({ cellProvider: indexer })

// If using secp256k1_blake160_multisig lock script, put MultisigScript to `fromInfos` for generate signing messages.
// By default, `common.transfer` will use cells with locktime firstly. `tipHeader` is required when you want to spent cells with locktime.
txSkeleton = await common.transfer(
  txSkeleton,
  fromInfos,
  "ckb1qyqrdsefa43s6m882pcj53m4gdnj4k440axqdt9rtd",
  BigInt(3500 * 10 ** 8),
  tipHeader,
)

// Or you want to use cells without locktime firstly.
txSkeleton = await common.transfer(
  txSkeleton,
  fromInfos,
  "ckb1qyqrdsefa43s6m882pcj53m4gdnj4k440axqdt9rtd",
  BigInt(3500 * 10 ** 8),
  tipHeader,
  { useLocktimeCellsFirst: false }
)

// When you want to pay fee for transaction, just call `payFee`.
txSkeleton = await common.payFee(
  txSkeleton,
  fromInfos,
  BigInt(1*10**8),
  tipHeader,
)

// `prepareSigningEntries` will generate message for signing.
// Signing messages will fill in `txSkeleton.signingEntries`.
txSkeleton = await common.prepareSigningEntries(
  txSkeleton
)

// Then you can sign messages in order and get contents.
// NOTE: lumos not provided tools for generate signatures now.
// Call `sealTransaction` to get a transaction.
const tx = sealTransaction(txSkeleton, contents)

// Then you can send tx to a CKB node via RPC `send_transaction`.
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Following script will show how to use DAO script.

const { dao } = require("@ckb-lumos/common-scripts")

let txSkeleton = TransactionSkeleton({ cellProvider: indexer })

// First, deposit capacity to dao.
txSkeleton = await dao.deposit(
  txSkeleton,
  "ckb1qyqrdsefa43s6m882pcj53m4gdnj4k440axqdt9rtd", // will gather inputs from this address.
  "ckb1qyqwyxfa75whssgkq9ukkdd30d8c7txct0gq5f9mxs", // will generate a dao cell with lock of this address.
  BigInt(1000*10**8),
)

// Using `listDaoCells` to list all deposited cells.
const daoDepositedCells = await dao.listDaoCells(
  indexer,
  "ckb1qyqwyxfa75whssgkq9ukkdd30d8c7txct0gq5f9mxs",
  "deposit",
)

// Or using `CellCollector`
const daoDepositedCellCollector = new dao.CellCollector(
  "ckb1qyqwyxfa75whssgkq9ukkdd30d8c7txct0gq5f9mxs",
  indexer,
  "deposit",
)

for await (const inputCell of daoDepositedCellCollector.collect()) {
  console.log(inputCell)
}

// And pick one to withdraw.
// `fromInfo` only required for multisig script.
txSkeleton = await dao.withdraw(
  txSkeleton,
  daoDepositedCells[0],
)

// Then if want to unlock dao withdrew cells, just use `common.transfer`.
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Following script will show how to use sUDT script.

const { sudt } = require("@ckb-lumos/common-scripts")
let txSkeleton = TransactionSkeleton({ cellProvider: indexer })

// issue an sudt token, will use the second param address to generate sudt token(it's lock hash).
txSkeleton = await sudt.issueToken(
  txSkeleton,
  "ckb1qyqrdsefa43s6m882pcj53m4gdnj4k440axqdt9rtd",
  10000n,
);

// and transfer sUDT
const sudtToken = "0x1f2615a8dde4e28ca736ff763c2078aff990043f4cbf09eb4b3a58a140a0862d"
txSkeleton = await sudt.transfer(
  txSkeleton,
  ["ckb1qyqrdsefa43s6m882pcj53m4gdnj4k440axqdt9rtd"],
  sudtToken,
  "ckb1qyqwyxfa75whssgkq9ukkdd30d8c7txct0gq5f9mxs",
  1000n,
  "ckb1qyqrdsefa43s6m882pcj53m4gdnj4k440axqdt9rtd",
);
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Following script will show how to use deploy script.

const { generateDeployWithDataTx, generateDeployWithTypeIdTx, generateUpgradeTypeIdDataTx, payFee } = require("@ckb-lumos/common-scripts");
const { Indexer } = require("@ckb-lumos/ckb-indexer");
const { initializeConfig, predefined } = require("@ckb-lumos/config-manager");
const { parseAddress } = require("@ckb-lumos/helpers");

initializeConfig(predefined.AGGRON4);

const CKB_RPC_URL = "http://localhost:8114";
const CKB_INDEXER_URL = "http://localhost:8116";
const indexer = new Indexer(CKB_INDEXER_URL, CKB_RPC_URL);

const address = "ckt1qyqptxys5l9vk39ft0hswscxgseawc77y2wqlr558h";
// Lock script of the deploy account
const outputScriptLock = parseAddress(address);
// Binary data you want to deploy
const scriptBinary = Uint8Array.of(1);

let deployOptions = {
  cellProvider: indexer,
  scriptBinary: scriptBinary,
  outputScriptLock: outputScriptLock,
}

// Ganarate txSkeleton for deploying with data.
let txSkeleton = await generateDeployWithDataTx(deployOptions);
// Or if you want to delpoy with Type ID so that you can upgarde the contract in the future.
let txSkeleton = await generateDeployWithTypeIdTx(deployOptions);

// Pay transaction fee.
txSkeleton = await payFee(txSkeleton, address, txFee);
// Then you can sign and seal the transaction for sending.


// To upgrade a contract with Type ID, add its Type ID to deployOptions.
const typeId = {
  codeHash: '0x00000000000000000000000000000000000000000000000000545950455f4944',
  hashType: 'type',
  args: '0x7abcd9f949a16b40ff5b50b56e62d2a6a007e544d8491bb56476693b6c45fd27'
}
const upgradeOptions = {
  cellProvider: cellProvider,
  scriptBinary: scriptBinary,
  outputScriptLock: outputScriptLock,
  typeId: typeId
}
// Ganarate txSkeleton for upgrading.
let upgradeTxSkeleton = await generateUpgradeTypeIdDataTx(upgradeOptions);
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Check omni lock example and pw lock example for how to use p2pkh script.