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0024-ckb-genesis-script-list.md

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Number 0024
Category Informational
Status Final
Author Dylan Duan <duanyytop@gmail.com>
Created 2020-05-21

CKB Genesis Script List

Abstract

Genesis scripts are the smart contracts built by the CKB team and set in the CKB genesis block. Genesis scripts provide core functions like (e.g. SECP256k1/blake160 and Nervos DAO). This document presents the information of all Nervos CKB genesis scripts, including a brief introduction and code_hash, hash_type, out_point(tx_hash and index), dep_type on mainnet Lina and testnet Aggron.

Motivation

Genesis scripts are used frequently in dapps, wallets, and other application development. A list of genesis scripts provides a handy reference to developers.

List of Genesis Scripts

To construct transactions with genesis scripts, the code_hash, hash_type, out_point and dep_type of genesis scripts in mainnet Lina and testnet Aggron are needed.

Locks

SECP256K1/blake160

SECP256K1/blake160 (Source Code) is the default lock script to verify CKB transaction signature.

SECP256K1/blake160 script is for lock script:

  • Lina
parameter value
code_hash 0x9bd7e06f3ecf4be0f2fcd2188b23f1b9fcc88e5d4b65a8637b17723bbda3cce8
hash_type type
tx_hash 0x71a7ba8fc96349fea0ed3a5c47992e3b4084b031a42264a018e0072e8172e46c
index 0x0
dep_type dep_group

Note:

The dep_type of SECP256K1/blake160 in Lina is dep_group means that the content of this dep cell contains two cell deps which are secp256k1_data and secp256k1_blake160_sighash_all whose dep_type are code.

The out_point of secp256k1_data is

{
  tx_hash: 0xe2fb199810d49a4d8beec56718ba2593b665db9d52299a0f9e6e75416d73ff5c,
  index: 0x3
}

and the out_point of secp256k1_blake160_sighash_all is

{
  tx_hash: 0xe2fb199810d49a4d8beec56718ba2593b665db9d52299a0f9e6e75416d73ff5c,
  index: 0x1
}
  • Aggron
parameter value
code_hash 0x9bd7e06f3ecf4be0f2fcd2188b23f1b9fcc88e5d4b65a8637b17723bbda3cce8
hash_type type
tx_hash 0xf8de3bb47d055cdf460d93a2a6e1b05f7432f9777c8c474abf4eec1d4aee5d37
index 0x0
dep_type dep_group

Note:

The dep_type of SECP256K1/blake160 in Aggron is dep_group means that the content of this dep cell contains two cell deps which are secp256k1_data and secp256k1_blake160_sighash_all whose dep_type are code.

The out_point of secp256k1_data is

{
  tx_hash: 0x8f8c79eb6671709633fe6a46de93c0fedc9c1b8a6527a18d3983879542635c9f,
  index: 0x3
}

and the out_point of secp256k1_blake160_sighash_all is

{
  tx_hash: 0x8f8c79eb6671709633fe6a46de93c0fedc9c1b8a6527a18d3983879542635c9f,
  index: 0x1
}

SECP256K1/multisig

SECP256K1/multisig (Source Code) is a script which allows a group of users to sign a single transaction.

SECP256K1/multisig script is for lock script:

  • Lina
parameter value
code_hash 0x5c5069eb0857efc65e1bca0c07df34c31663b3622fd3876c876320fc9634e2a8
hash_type type
tx_hash 0x71a7ba8fc96349fea0ed3a5c47992e3b4084b031a42264a018e0072e8172e46c
index 0x1
dep_type dep_group

Note:

The dep_type of SECP256K1/multisig in Lina is dep_group means that the content of this dep cell contains two cell deps which are secp256k1_data and secp256k1_blake160_multisig_all whose dep_type are code.

The out_point of secp256k1_data is

{
  tx_hash: 0xe2fb199810d49a4d8beec56718ba2593b665db9d52299a0f9e6e75416d73ff5c,
  index: 0x3
}

and the out_point of secp256k1_blake160_multisig_all is

{
  tx_hash: 0xe2fb199810d49a4d8beec56718ba2593b665db9d52299a0f9e6e75416d73ff5c,
  index: 0x4
}
  • Aggron
parameter value
code_hash 0x5c5069eb0857efc65e1bca0c07df34c31663b3622fd3876c876320fc9634e2a8
hash_type type
tx_hash 0xf8de3bb47d055cdf460d93a2a6e1b05f7432f9777c8c474abf4eec1d4aee5d37
index 0x1
dep_type dep_group

Note:

The dep_type of SECP256K1/blake160 in Aggron is dep_group means that the content of this dep cell contains two cell deps which are secp256k1_data and secp256k1_blake160_multisig_all whose dep_type are code.

The out_point of secp256k1_data is

{
  tx_hash: 0x8f8c79eb6671709633fe6a46de93c0fedc9c1b8a6527a18d3983879542635c9f,
  index: 0x3
}

and the out_point of secp256k1_blake160_multisig_all is

{
  tx_hash: 0x8f8c79eb6671709633fe6a46de93c0fedc9c1b8a6527a18d3983879542635c9f,
  index: 0x4
}

Types

Nervos DAO

Nervos DAO (Source Code) is the script implements Nervos DAO.

Nervos DAO script is for type script:

  • Lina
parameter value
code_hash 0x82d76d1b75fe2fd9a27dfbaa65a039221a380d76c926f378d3f81cf3e7e13f2e
hash_type type
tx_hash 0xe2fb199810d49a4d8beec56718ba2593b665db9d52299a0f9e6e75416d73ff5c
index 0x2
dep_type code
  • Aggron
parameter value
code_hash 0x82d76d1b75fe2fd9a27dfbaa65a039221a380d76c926f378d3f81cf3e7e13f2e
hash_type type
tx_hash 0x8f8c79eb6671709633fe6a46de93c0fedc9c1b8a6527a18d3983879542635c9f
index 0x2
dep_type code

Type ID

Strictly speaking, Type ID (Source Code) is a builtin script directly implemented in Rust within CKB, it doesn't run in CKB-VM. It's still included in this document because it can be used the same way as other genesis scripts since genesis block.

Type ID is used to support unique and immutable references. The code_hash and hash_type are fixed and the same on mainnet Lina and testnet Aggron and the dep_type is no need.

Type ID script is for type script:

  • Lina & Aggron
parameter value
code_hash 0x00000000000000000000000000000000000000000000000000545950455f4944
hash_type type