Round 2 — fixes the CRITICAL discovered during round 1 (as severe as the withdrawal
BOLA): lock_/release_/refund_escrow_internal had default PUBLIC EXECUTE and the client
called release_escrow_internal directly with the anon key, so anyone could drain any
victim's LOCKED balance.
- release_escrow_internal now reachable only via new signed confirm-payment edge
function: verifies seller wallet signature (raw + <Bytes>), asserts the wallet owns
the seller identity, derived user_id == trade.seller_id, trade == payment_sent,
single-use nonce, then release runs with the service role. confirmPaymentReceived
now invokes confirm-payment (no more anon rpc).
- lock_escrow_internal now behind new signed lock-escrow edge function (a caller can
only lock its own balance; stops griefing a victim's balance). Removed a zero-amount
no-op lock call.
- Migration 20260725030000: REVOKE EXECUTE on lock_/release_/refund_escrow_internal
from PUBLIC/anon/authenticated; GRANT to service_role only. refund has no direct
client caller (service-role + admin_resolve_dispute only).
- DEPLOY_RUNBOOK.md consolidates the ordered migrations, edge functions and secrets
for both security rounds. Migration 20260725030000 must ship WITH the two new edge
functions + frontend or offer-create/payment-release break.
Remaining (non-fund, Round 2+ follow-up): read RPCs still key on a non-secret user_id
(binding to a signed session would force a sign-prompt on every passive balance read —
deferred); p2p_fiat_offers/trades/messages retain USING(true) (status labels move no
funds now that all escrow movement is service-role-gated).
