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Diffstat (limited to 'bip-0325.mediawiki')
| -rw-r--r-- | bip-0325.mediawiki | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/bip-0325.mediawiki b/bip-0325.mediawiki index 4b45030..5a9f3f1 100644 --- a/bip-0325.mediawiki +++ b/bip-0325.mediawiki @@ -3,9 +3,10 @@ Layer: Applications Title: Signet Author: Karl-Johan Alm <karljohan-alm@garage.co.jp> + Anthony Towns <aj@erisian.com.au> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0325 - Status: Draft + Status: Proposed Type: Standards Track Created: 2019-03-20 License: CC0-1.0 @@ -21,19 +22,20 @@ 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: +Signet requires all blocks to have a BIP 141 commitment in the coinbase transaction. In order to provide a non-empty solution to the block challenge the block's BIP 141 commitment's optional data must include an additional commitment of the signature/solution for the block: 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). +In the special case where an empty solution is valid (ie scriptSig and scriptWitness are both empty) this additional commitment can optionally be left out. This special case is to allow non-signet-aware block generation code to be used to test a custom signet chain where the challenge is trivially true. + +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. @@ -60,8 +62,10 @@ The "to_sign" transaction is: vin[0].prevout.hash = to_spend.txid vin[0].prevout.n = 0 vin[0].nSequence = 0 + vin[0].sigScript = [ signet_solution sigScript (x bytes), if any ] + vin[0].scriptWitness = [ signet_solution scriptWitness (y bytes), if any ] vout[0].nValue = 0 - vout[0].scriptPubKey = signet_challenge + vout[0].scriptPubKey = OP_RETURN The scriptSig and/or scriptWitness for <code>vin[0]</code> are filled in from the Signet header push above. @@ -77,11 +81,12 @@ The genesis block is the same for all signet networks, whereas the message start === 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 0100000000000000000000000000000000000000000000000000000000000000000000003ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a008f4d5fae77031e8ad222030101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000. === Message Start === |