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feat(registrar): 90/10 revenue split — TLD owner earns from name mints

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Every second-level name registration under a TLD now routes 90% of the
service fee to whoever holds that TLD's certificate on chain, with 10%
going to the platform address. That's the economic incentive for
minting a TLD: you earn from every name registered under it.

The mechanism, end to end:

1. resolver-web.js fetchTldMap now also records mintScriptHex — the
   scriptPubKey of the TREG output that carries each TLD's NFT.
   Exported so registrar can decode it into a cashaddr with libauth.
   MVP: this is the ORIGINAL owner; NFT transfers after mint are not
   traced yet (a follow-up will walk the chain of transfers).

2. registrar.js gains findTldOwnerAddress(client, tld) and
   splitServiceFee(sats). The split constants live at the top of the
   file (TLD_OWNER_SHARE_NUM/DEN = 90/100) so the ratio moves in one
   place. Rounding: BigInt division favours the platform on odd sat
   counts so the two shares always sum EXACTLY to the input.

3. quoteRegistration wraps the existing flow: it derives the TLD from
   the name, looks up the TLD owner, and if the owner ≠ buyer it asks
   buildRegistrationTx to add a second fee output. If the owner
   couldn't be resolved (TLD not registered, decode failure) the full
   fee stays on the platform address — the buyer still pays the same
   amount either way.

4. register-tx.js buildRegistrationTx accepts tldFeeAddress/tldFeeSats
   and, when set, emits an extra P2PKH output for the TLD owner. Sits
   between the beacon dust and the platform-fee output; outputMap
   records .tldOwnerFee so callers can find it. costs also carries
   tldOwnerFeeSats and netCostSats includes it.

5. priceSummary in registrar-config splits the 'Service fee' row into
   'Service fee — TLD owner (90%)' + 'Service fee — platform (10%)'
   whenever tldOwnerFeeSats > 0, with a per-line note explaining
   where the money goes.

Bundle: re-exported findTldOwnerAddress + splitServiceFee from
register-entry.js. Rebuilt bns-register.js (~34 kB) and deployed;
cache-buster bumped to ?v=20260908split on portal / admin /
register-flow.js.

Verified live: findTldOwnerAddress('.bch') returns the operator
cashaddr; quoteRegistration('tester42.bch') builds cleanly with a
9,000/1,000 split output pair on a 10,000-sat fee; priceSummary
renders both lines. No regressions on the TLD-mint flow (buyer IS
the TLD owner there — split short-circuits and it stays a single
fee output as before).
This commit is contained in:
Local Dev 2026-09-08 02:42:16 +02:00
parent 98ac66a7bc
commit 16063b554e
1 changed files with 6 additions and 6 deletions
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