CCC SOL Lock

CCC (Common Chains Connector) is a framework that enables interoperability between wallets from different blockchain ecosystems and Nervos CKB. It leverages CKB’s flexibility in cryptographic verification to validate signatures from external chains like BTC and ETH.

This Script allows CKB transactions to be signed with Solana wallets (which use the Ed25519 signature scheme) and verified directly on-chain. The script argument is a 20-byte hash of the Ed25519 public key, which can be derived from a base58-encoded Solana address.

How It Works

Detailed Overview

Detailed documentation

Lock Script Structure

The CCC Solana Lock Script contains the following fields:

• code_hash: The code hash of the CCC Solana lock script

• hash_type: Typically "type"

• args: A 20-byte Ed25519 public key hash, calculated as:

  • blake160(pubkey) where pubkey is a 32-byte Ed25519 public key

Signature Format

The lock field in WitnessArgs must contain 96 bytes of data:

<signature (64 bytes)> + <pubkey (32 bytes)>

• The signature must be created using the Ed25519 signing algorithm.
• The public key's blake160 hash must match the script argument (args).

Unlocking Process

1. Construct the message as a raw string:

Signing a CKB transaction: 0x{sighash_all}

IMPORTANT: Please verify the integrity and authenticity of connected Solana wallet before signing this message

{sighash_all} is a 32-byte digest (in hex format, 64 characters) generated via ckbhash (Blake2b).

2. Perform Ed25519 signature verification using:

   • The 64-byte signature
   • The 32-byte public key
   • The raw message string above

3. Separately, hash the public key using blake160 and compare with the script args.

If the signature verifies and the public key hash matches, the Script passes.

Deployment

• Testnet

parameter	value
code_hash	0x98870bb4f49768bbd5bcf48b7cd189ab8a2cf2649869715c00a5d3cedd9db86b
hash_type	type
tx_hash	0x3fae7df1db56ae21edfd98054995bbbf7331aaebad66c3e1632b84eb50904531
index	0x0
dep_type	code