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Diffstat (limited to 'bip-0325.mediawiki')
| -rw-r--r-- | bip-0325.mediawiki | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/bip-0325.mediawiki b/bip-0325.mediawiki index ff1a145..b5b25e1 100644 --- a/bip-0325.mediawiki +++ b/bip-0325.mediawiki @@ -21,19 +21,18 @@ Testnet is a great place to try out new things without risking real money, but i A new type of test network would be more suitable for integration testing by organizations such as exchanges, or testing of next generation Layer-2 protocols like Eltoo or sidechain pegs. The goal is not to be perfectly reliable but rather to have a predictable amount of unreliability. You want a test network to behave like mainnet (i.e. no thousands of block reorgs) while also making it easier to trigger expected but rare events like a 6-block reorg. Regtest is not suitable for longer-term scenarios involving multiple independent parties because creating blocks costs nothing, so any party can completely control the test network. - == Specification == A new type of network ("signet"), which takes an additional consensus parameter called the challenge (scriptPubKey). The challenge can be a simple pubkey (P2PKH style), or a k-of-n multisig, or any other script you would want. The witness commitment of the coinbase transaction is extended to include a secondary commitment (the signature/solution) of either: - 1-4 bytes - Push the following (4 + x + y) bytes - 4 bytes - Signet scriptSig header (0xecc7daa2) + 1-5 bytes - Push the following (4 + x + y) bytes + 4 bytes - Signet header (0xecc7daa2) x bytes - scriptSig y bytes - scriptWitness -The scriptSig is serialized by first encoding its length as CompactSize. If the scriptWitness is empty, it is encoded as 0 bytes, otherwise it is encoded in the usual way (see BIP 141 "witness" encoding). +The scriptSig is serialized by first encoding its length as CompactSize. The scriptWitness stack is serialized as described in BIP 141. Any push operations that do not start with the 4 byte Signet header are ignored. Multiple push operations with the 4 byte Signet header are ignored except for the first instance of the header. @@ -65,21 +64,24 @@ The "to_sign" transaction is: The scriptSig and/or scriptWitness for <code>vin[0]</code> are filled in from the Signet header push above. -To simplify block generation (mining), the signature also does not commit to the the block nonce value, so that rolling the nonce to generate proof-of-work does not also require regenerating signatures. When grinding proof of work, the extended nonce cannot be used as it would invalidate the signature. Instead, simply resigning the same (or an updated) block will give a new search space. +To simplify block generation (mining), the signature also does not commit to the block nonce value, so that rolling the nonce to generate proof-of-work does not also require regenerating signatures. When grinding proof of work, the extended nonce cannot be used as it would invalidate the signature. Instead, simply resigning the same (or an updated) block will give a new search space. A block is considered fully validated only if the to_sign transaction is a valid spend of the to_spend transaction. It is recommended that this verification is done directly before or after the witness commitment verification, as the data required to do both is approximately the same. +There is one other acceptable special case: if a block's challenge is e.g. `OP_TRUE` (`0x51`), where an empty solution would result in success, the block is also considered valid if the signet commitment is absent. + == Genesis Block and Message Start == The genesis block is the same for all signet networks, whereas the message start is defined as the first four bytes of the sha256d of the challenge script as a single data push (see below). === Genesis Block === -* Time stamp: 1534313275 -* Nonce: 100123 -* Difficulty: 1e2adc28 +* Time stamp: 1598918400 +* Nonce: 52613770 +* Difficulty: 0x1e0377ae +* Version: 1 -The resulting genesis block hash is 0000032d7f67af9ec7b7152aea0fe7c95b9804ff973265e252f245e0ae61799d, and the block hex is 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. +The resulting genesis block hash is 00000008819873e925422c1ff0f99f7cc9bbb232af63a077a480a3633bee1ef6, and the block hex is 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. === Message Start === |