feat(escrow_wip): aiken validator + plutus.json blueprint

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⚠ WIP — UNAUDITED. Plutus V3, Aiken v1.1.21. Preprod-only.

Five-redeemer two-party agreement-with-veto escrow validator. Mirrors the
off-chain codecs at crates/aldabra-dao/src/agora/escrow.rs.

Validator script hash: 223aa7ace4a98ff5b8f8988c1c07b846c046de1a2bc9e8dc77411486
Compiled UPLC size: 7902 bytes.

Datum: ProductIsData (Constr 0 [a, b, recipient, deadline, lock, state, deposits]).
Redeemer: Constr 0..4 (Deposit | Agree | Veto | Settle | Refund).
DepositEntry.value uses concrete Pairs<ByteArray, Pairs<ByteArray, Int>>
since cardano/assets.Value is opaque (datums require concrete types).
Pairs encode as Plutus Map at the dataType layer — matches the off-chain
EscrowValue codec's PlutusData::Map(KeyValuePairs) emission.

Build: cd aiken-escrow && aiken build (produces plutus.json blueprint).

Threat-model gaps explicitly documented in aiken-escrow/README.md:
- CBOR canonicality of Pairs serialisation (validator equality check)
- Stake-credential null'd on refund outputs (intentional — protects pool
  delegation privacy at cost of stake reward routing)
- No min-utxo enforcement on refund legs (off-chain builder's job)
- No multi-script-input cross-UTxO consistency

External audit gates mainnet deployment.

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Sulkta 2026-05-09 11:38:45 -07:00

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