Stellar-compatible LayerZero DVN
Problem Statement
LayerZero V2's Stellar implementation is built on Soroban and in security audits, but only one reference DVN (LzDVN, secp256k1 multisig) verifies its messages. For Stellar to be a credible omnichain destination — with issuers like USDT0, Paxos, BitGo, Solv, and Ethena preparing to launch via LayerZero — applications need a meaningful choice of independent Decentralized Verifier Networks to compose into their X-of-Y-of-N Security Stack. This RFP funds teams ALREADY operating production DVNs on LayerZero V2 to extend their service to Stellar; greenfield DVN proposals are out of scope.
Technical Requirements
Hard Prerequisite: A production DVN live on at least one LayerZero V2 mainnet pathway, with attestation history verifiable on LayerZero Scan — the Stellar deployment is an extension of an existing service, not a new entity. Stellar DVN Contract: A Soroban contract conforming to the LayerZero V2 DVN interface and the Stellar implementation's Abstract Account pattern (custom __check_auth — Soroban prohibits reentrancy), submitting attestations to Stellar's ULN302 message library. Testnet first, then an audited mainnet deployment; each team arranges and funds its own audit. Off-chain Verifier: The team's existing verification service (ZK, TEE, K-of-N, light client, or other) extended to listen to Stellar RPC for PacketSent events and attest in both directions, keeping the security guarantee consistent across pathways. Stellar Constraints: Correct bytes32-to-Stellar address conversion, TTL-aware storage with the hybrid extension strategy, and attestation flows within Soroban's per-transaction limits (200 reads, instruction/memory/write-entry caps). Pathway Coverage: At minimum Stellar to Ethereum, Arbitrum, Base, Optimism, Polygon, Avalanche, Solana, and BNB Chain. Operations: 24-month maintenance commitment with at least 2 nodes, public operational telemetry (verifications served, error rate, latency), and listing on LayerZero's official DVN provider directory as a hard deliverable.