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).
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