Add Himpool mining pool

[warlocksingh]

Adds an entry for Himpool (https://himpool.com), which has been mining Fractal Bitcoin since 2026-09-04. Our blocks are currently attributed to Unknown.

  {
    "id": 1021,
    "name": "Himpool",
    "addresses": ["17J8rhJaJ7QJ3AmTPz3RJFetyQC4WYJQZW"],
    "tags": ["Himpool"],
    "link": "https://himpool.com"
  }

Evidence

Recent Fractal blocks mined by Himpool, all paying 17J8rhJaJ7QJ3AmTPz3RJFetyQC4WYJQZW:

height	block hash
2097398	00000000000000006daaa858eee145d4551f6295f06ac12056d36ec7531eb66c
2096505	00000000000000003b5bafdbd56d8705495e5736db3e12943df009062892664b
2096339	000000000000000037290dd35335ddd540bf8a24928948aa22a473920e7ef9ba
2096045	000000000000000093f1f892a8eeed23b44f9ac9df2a40d49c71a7ca85dbd342
2095931	0000000000000000d0f00edbd16685fcbfaaac56657305223b19c06c080e3baa

Coinbase scriptSig of block 2097398:

03f600200495249e6a00d000000725a29a6f523103000748696d706f6f6c

The final push is 07 48696d706f6f6c — ASCII Himpool. Every Himpool block carries it.

Notes

• The tags entry is what does the work here. Our coinbase output layout puts the OP_RETURN witness commitment at vout[0] and the payout at vout[1], so vout[0].scriptpubkey_address is undefined and the address branch never fires for us. The address is listed for completeness. This mirrors PrimeTriad (Adding PrimeTriad pool #26), which is likewise matched by a slash-free tag.
• The tag Himpool was checked against every other entry in pools-v2.json under the README's new RegExp(tag, 'i') rule: it matches only Himpool coinbases, and no existing pool's tag matches ours. No existing attribution changes.
• sh dupes.sh → no duplicate pool ids found; jq empty pools-v2.json → clean. 1021 is the next free id after PoolBTC (Add PoolBTC mining pool #29).
• A companion logo PR follows in fractal-bitcoin/mining-pool-logos.

🤖 Generated with Claude Code

[warlocksingh]

Companion logo PR: fractal-bitcoin/mining-pool-logos#14

[Copilot]

🟢 Approval recommended

The change is a small, valid data-only addition (unique id/tag in pools-v2.json) with no detected conflicts in the repository file.

Pull request overview

This PR updates the mining pool attribution data by adding Himpool to pools-v2.json, enabling Fractal Bitcoin blocks containing the Himpool coinbase tag to be attributed correctly instead of showing as Unknown.

Changes:

• Added a new pool entry (id: 1021) for Himpool with tag-based matching ("tags": ["Himpool"]).
• Included Himpool’s payout address (17J8rhJaJ7QJ3AmTPz3RJFetyQC4WYJQZW) and website link (https://himpool.com) in the pool metadata.

File summaries

File	Description
pools-v2.json	Adds the Himpool pool definition (id/name/tags/address/link) to support correct on-chain attribution.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Lite

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