Provable delivery
Seller fulfillment is tied to commitments, proof verification, data availability, and buyer-recoverable key material.
Provable delivery protocol
TrustDrop makes delivery enforceable.
TrustDrop binds encrypted delivery, data availability, and key release into proof-backed evidence that contracts can act on. Buyers do not rely on seller promises, and sellers do not expose the asset before payment is locked.
1
Commit encrypted asset and lock payment intent.
2
Verify data availability and proof-bound delivery.
3
Release recoverable key material to the buyer.
4
Settle only after the fulfillment path is provable.
File exchange is one application built on top of TrustDrop. The protocol layer is more general: it is about making delivery itself provable, so an application can reason about whether a seller has fulfilled before funds are released.
Settlement gating
Payment release depends on protocol-visible fulfillment evidence, not on a buyer trusting an off-chain promise.
Application layer
Marketplaces, private data sales, and encrypted file delivery are frontends over the same proof-backed delivery core.