Summary

Implement a marketplace.v1 web contract profile for peer-to-peer exchange, inspired by Mostro.

Context

Mostro is a P2P Bitcoin↔fiat exchange running on Nostr + Lightning. Its state machine (create order → take → fiat-sent → release/dispute/resolve) maps directly to a web contract with 7 transitions and webledger escrow.

What's needed

1. Contract source (marketplace.js) — transition functions: createOrder, takeOrder, fiatSent, release, cancel, dispute, resolve
2. Executor support — the generic contract executor (see marketplace.v1 — P2P exchange contract (Mostro-inspired) #200) handles this automatically once built
3. Webledger escrow — createOrder debits seller's balance (locks funds), release credits buyer, cancel/resolve returns to appropriate party

Transitions

Dependencies

• Generic contract executor (marketplace.v1 — P2P exchange contract (Mostro-inspired) #200)
• Webledgers integration (existing)

References

• Spec: marketplace.v1 profile — P2P exchange inspired by Mostro webcontracts/webcontracts.github.io#6
• Mostro docs: https://mostro.network/docs-english/
• Mostro GitHub: https://github.com/MostroP2P