Platform · Construction Lending
A draw that cannot fund without its waiver
Unykorn settles a construction draw and its mechanic’s-lien waiver in a single atomic transaction. Either both happen or neither does, which removes the oldest failure mode in construction finance: money out, waiver never collected.
How does a milestone draw get released?
Only against a signed attestation. A milestone is marked complete when an authorized oracle — an inspector, a drone survey, or a BIM verification — submits a cryptographically signed attestation that the work exists. The escrow verifies the signature on-chain before releasing any funds, so a draw is bound to verified physical progress rather than a claim.
What makes the lien-waiver exchange safe?
Atomicity. The payment to the subcontractor and the recording of their signed mechanic’s-lien waiver are the same transaction. There is no window in which funds have moved but the waiver is outstanding. Retainage is held and released on the same rails.
How are attestations trusted?
Through one shared primitive. Inspector, drone, and BIM sign-offs use the same EIP-712 signed-attestation framework the rest of the platform uses for oracles — with a signer allowlist, nonce-based replay protection, and a staleness window. No product rolls its own signing.
Frequently asked
Can a construction draw be released without an inspection?
No. The escrow verifies a signed inspector, drone, or BIM attestation on-chain before releasing funds. Absent a valid signature from an allowlisted oracle, the draw does not fund.
What stops paying a sub without collecting a lien waiver?
Atomic settlement. The payment and the signed lien-waiver record are the same transaction, so funds cannot move unless the waiver is captured in the same step.