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Architecture

Permissionless SVG mint is a desk: a holder pays ZEC or native THIOL, DREGG entitles, CosmWasm mints an SVG NFT on Terp morocco-1. HashMerchant never buys the NFT. The house Zcash stack never answers the browser.

Actors

Actor	Does	Must not be
Holder	Keplr `terp1` or passkey-bound device	Admin
DREGG (`svg-mint-fed`)	Checkout, watch, entitle, mint	Feegrant granter, deposit UA
HashMerchant onboard	One-time `MsgAddAuthenticator` feegrant after paid `c`	Minter
svg-mint-zrt	House ZEC seed, note ledger, recover policy	Public zec.rocks. This build does not scan or broadcast.
ztreamer	CompactTxStreamer (`GetLightdInfo.vendor = Ztreamer`)	ECC lightwalletd
Zakura	Zcash full node, loopback RPC	Browser JSON-RPC
Admin	ADR-036 recover to the donation UA	Deposit wallet

Runtime graph

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Trust waist

A note is this checkout when its address is the diversified UA, or its memo is the payment id. Empty memos still count when the address matches.
Unmined is receipt. The page says "Payment received. Minting after the next block." The mint runs only after that note is mined.
Unpaid checkouts show a countdown (pending_ttl_secs, default 10 minutes). The clock stops once the note is seen. It does not reset on refresh.
The desk shows one sentence per step. It does not dump /health JSON at the holder.
ZIP-321 memo is a blinded Pedersen commitment (memo_hex starts 6431), never a terp1.
checkout_ready is the Pay gate. /v1/prices ok is not Pay.
House ZEC tip may hide zec_uri without closing native THIOL.
Compact server is house ztreamer on loopback. Never zec.rocks. Never zcash.rotko.net.
Recover is a fresh ADR-036 over amount + donation UA + challenge. A login signature cannot spend.

Source trees

Workspace: ~/abstract/svg-mint (this documentation, the dregg library, svg-mint-fed, svg-mint-zrt). terp-core/crates/dregg/svg-mint is a leftover snapshot.

Pinned runtimes (git submodules of the product crate, see Runtimes):

Zakura — zakura-core/zakura tag v1.6.0
ztreamer — house CompactTxStreamer (vendor Ztreamer)