bip-325: document signet minimum difficulty #2056

1. 
   ajtowns commented at 2:11 am on December 13, 2025: contributor

   This was implicit in the genesis block’s nbits value, but better to be clearer.
2. in bip-0325.mediawiki:81 in 3279d6dc07

   74@@ -75,6 +75,15 @@ A block is considered fully validated only if the to_sign transaction is a valid
   75 
   76 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.
   77 
   78+=== Minimum Difficulty ===
   79+
   80+The minimum difficulty for blocks in signet is approximately
   81+0.0011265, corresponding with a maximum target of
   

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   jonatack commented at 5:41 pm on December 13, 2025:

   nit, s/corresponding with/corresponding to/

   (use “corresponding with” for communication with, and “corresponding to” for when two things are similar, match, or are in agreement)

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   ajtowns commented at 8:05 pm on December 13, 2025:

   This seems to be a preference, Cambridge and Oxford both list “correspond with” as having this sense. Changed anyway though.
3. jonatack added the label BIP update by author on Dec 13, 2025
4. bip-325: document signet minimum difficulty

   This was implicit in the genesis block's nbits value, but better to be clearer.

   56e909458b
5. ajtowns force-pushed on Dec 13, 2025
6. in bip-0325.mediawiki:83 in 56e909458b

   74@@ -75,6 +75,15 @@ A block is considered fully validated only if the to_sign transaction is a valid
   75 
   76 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.
   77 
   78+=== Minimum Difficulty ===
   79+
   80+The minimum difficulty for blocks in signet is approximately
   81+0.0011265, corresponding to a maximum target of
   82+<code>00000377ae000000000000000000000000000000000000000000000000000000</code>
   83+which is represented by an nBits value of <code>0x1e0377ae</code>.
   

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   jonatack commented at 6:29 pm on December 15, 2025:

   Verified the maximum target and nBits values correspond to those for signet in src/kernel/chainparams.cpp in Bitcoin Core:

   0consensus.powLimit = uint256{"00000377ae000000000000000000000000000000000000000000000000000000"};
   1
   2.../...
   3
   4genesis = CreateGenesisBlock(1598918400, 52613770, 0x1e0377ae, 1, 50 * COIN);
   

   Edit: verified that these values yield a minimum difficulty of ~0.0011265.

7. 
   jonatack commented at 6:39 pm on December 15, 2025: member

   ACK 56e909458bb73ae430d5e7816f82e4579c600ec1
8. jonatack merged this on Dec 15, 2025
9. jonatack closed this on Dec 15, 2025

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