https://github.com/bitcoin/libblkmaker

MIT-licensed C implementation of getblocktemplate
https://github.com/bitcoin/libblkmaker

Last synced: about 1 month ago
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MIT-licensed C implementation of getblocktemplate

• Host: GitHub
• URL: https://github.com/bitcoin/libblkmaker
• Owner: bitcoin
• License: mit
• Created: 2015-03-10T20:54:55.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2024-05-10T11:12:54.000Z (6 months ago)
• Last Synced: 2024-09-29T03:41:20.529Z (about 1 month ago)
• Language: C
• Size: 260 KB
• Stars: 197
• Watchers: 46
• Forks: 217
• Open Issues: 6
• Metadata Files:
  • Readme: README
  • License: COPYING
  • Authors: AUTHORS

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README

        
Dependencies:

	Jansson 2.0 with 'long long' support

Example dependencies:

	Jansson 2.1 (to read JSON from stdin)

	libgcrypt (for SHA256)

For usage, check out example.c. Run "make example" to build it.

Note that you must assign blkmk_sha256_impl to a function pointer:

	bool mysha256(void *hash_out, const void *data, size_t datasz)

hash_out must be able to overlap with data!

Also note that you should NOT roll ntime for data retrieved without explicitly

checking that it falls within the template's limitations (mintime, maxtime,

mintimeoff, and maxtimeoff); read the BIP 23 specification in detail to

understand how they work. It is usually best to simply get more data as often

as it is needed. For blkmk_get_mdata, you may specify that you intend to roll

the ntime header exactly once per second past usetime - it will then set

*out_expires such that the expiration occurs before you roll beyond any ntime

limits. If you are rolling ntime at any rate other than once per second, you

should NOT specify can_roll_ntime to blkmk_get_mdata, and must check that your

usage falls within the explicit template limits yourself.