Fiber Funding Lock 约束Fiber Funding Lock Constraints
来源：nervosnetwork/fiber-scripts / contracts/funding-lock/src/main.rs · 部署：nervosnetwork/fiber config/mainnet|testnet/config.yml · mainnet 0xe45b…f4f1 / testnet 0x6c67…6d7c (type)Source: nervosnetwork/fiber-scripts / contracts/funding-lock/src/main.rs · deployments: nervosnetwork/fiber config/mainnet|testnet/config.yml · mainnet 0xe45b…f4f1 / testnet 0x6c67…6d7c (type)
Fiber Network
- 官网Websitewww.fiber.world
- GitHubGitHubgithub.com/nervosnetwork/fiber
- DiscordDiscorddiscord.gg/BF9AJ4fzs6
来源：Source: nervosnetwork/fiber repo homepage + README
A通道资金 → 承诺交易（双方 2-of-2 Schnorr 聚合签名）Channel funding → commitment tx (2-of-2 aggregated Schnorr)
Inputs 输入Inputs
funding cell（唯一 group 输入）funding cell (the only group input)Cell{ lock: { codeHash: FUNDING_LOCK, args: pubkey_hash 20B },
type: xUDT?, capacity }
➜
Outputs 输出Outputs
commitment cellcommitment cellCell{ lock: COMMITMENT_LOCK(...) }
args 字节布局args byte layout
pubkey_hash20B
- pubkey_hash 20B blake160(双方 x-only 聚合公钥)blake160(x-only aggregated pubkey of both parties) ckb-auth 比对checked by ckb-auth (8)
witness 字节布局（112 字节，非 WitnessArgs）witness byte layout (112 bytes, not WitnessArgs)
empty_witness_args16B
pubkey32B
signature64B
- empty_witness_args 16B 空 WitnessArgs 占位，兼容 xUDTempty WitnessArgs placeholder for xUDT compatibility = 0x10000000…10000000= 0x10000000…10000000 (7)
- pubkey 32B x-only 聚合公钥（Schnorr 无法恢复公钥）x-only aggregated pubkey (Schnorr cannot recover it) blake160 = argsblake160 = args (8)
- signature 64B MuSig2 聚合签名MuSig2 aggregated signature 覆盖 blake2b(raw tx 去掉 cell_deps)over blake2b(raw tx without cell_deps) (8)
限制Constraints
- inputs：: group 中只能有 1 个输入exactly 1 input in the group (5)
- witness：: 长度恰为 112 = 16 + 32 + 64length exactly 112 = 16 + 32 + 64 (6)
- witness[0..16] = 空 WitnessArgs 占位= empty WitnessArgs placeholder (7)
- signature：: exec ckb-auth（Schnorr，算法 7），消息 = blake2b(raw tx 去掉 cell_deps)（未检查）exec ckb-auth (Schnorr, algorithm 7), message = blake2b(raw tx without cell_deps) (not checked) (8)
部署与来源Deployments & source 未核验unverified
源码source nervosnetwork/fiber-scripts@e7e1c9ba · contracts/funding-lock/src/main.rs (commit read when writing this spec)
二进制核验binary check 未核验unverified hash appears in the repo only as a deployment record or doc, which does not prove the recorded commit builds this binary (reproducible build not attempted)
0x17b1910fbc…67716e47: listed in deployment/mainnet/migrations/2026-01-14-030304.json; listed in deployment/testnet/migrations/2025-11-25-060540.json
0x17b1910fbc…67716e47: listed in deployment/mainnet/migrations/2026-01-14-030304.json; listed in deployment/testnet/migrations/2025-11-25-060540.json
| 网络network | code_hash | cell_dep | type_id args | 数据哈希data hash | 部署交易deploy tx |
|---|---|---|---|---|---|
| mainnet | 0xe45b1f8f21bff23137035a3ab751d75b36a981deec3e7820194b9c042967f4f1 type | 0x95006eee7b…c720b9d6:1 code | 0x64818d82a3…dc243394 | 0x17b1910fbc…67716e47 | 0x95006eee7b…c720b9d6 #18372567 |
| testnet | 0x6c67887fe201ee0c7853f1682c0b77c0e6214044c156c7558269390a8afa6d7c type | 0x12c569a258…79dd14a7:1 code | 0x3cb7c0304f…569f10f6 | 0x17b1910fbc…67716e47 | 0x12c569a258…79dd14a7 #19249889 |
链上数据核对于 on-chain data checked 2026-10-20
错误码（main.rs Error）：1 IndexOutOfBound · 2 ItemMissing · 3 LengthNotEnough · 4 Encoding · 5 MultipleInputs · 6 WitnessLenError · 7 EmptyWitnessArgsError · 8 AuthErrorError codes (main.rs Error): 1 IndexOutOfBound · 2 ItemMissing · 3 LengthNotEnough · 4 Encoding · 5 MultipleInputs · 6 WitnessLenError · 7 EmptyWitnessArgsError · 8 AuthError
消息不含 cell_deps，因此可在不重签的情况下替换依赖（例如合约升级后）The message omits cell_deps, so deps can be swapped without re-signing (e.g. after an upgrade)
消息不含 cell_deps，因此可在不重签的情况下替换依赖（例如合约升级后）The message omits cell_deps, so deps can be swapped without re-signing (e.g. after an upgrade)