ZKForge Multichain Private Bridge - Technical Overview
The ZKForge Multichain Private Bridge enables private, unlinkable cross-chain transfers. All transaction details and proofs are stored on IPFS and permanently persisted on Filecoin using Lighthouse for smooth, reliable storage deals.
How it works
. User creates a bridge request specifying source chain, destination chain, asset, and intended amount.
. The system generates a unique Bridge Hash to identify the operation without exposing user identity or backend routing logic.
. A local ephemeral Ed25519 keypair is generated for the session. This proves ownership without reusing persistent keys.
. The client constructs a canonical bridge intent payload and creates a commitment tied to the Bridge Hash.
. The client generates a non-interactive proof showing control of funds and matching intent, without revealing wallet history or secrets.
Deposit and commitment
. User deposits assets into the designated source-chain deposit contract or gateway.
. The deposit event includes only the Bridge Hash and the commitment, never the user’s identity.
. The deposit record, commitment, proofs, and metadata are packaged into a transaction bundle.
. The bundle is uploaded to IPFS and then stored permanently on Filecoin using Lighthouse, producing a CID for verification.
Backend routing and processing
. The backend retrieves the canonical bundle from IPFS via its CID.
. It processes the bridge routing using only the Bridge Hash, without linking to user information.
. All intermediate steps, routing receipts, and status updates are appended to the bundle and re-uploaded to IPFS.
. Each updated IPFS bundle is persisted on Filecoin through Lighthouse, generating new verifiable CIDs at every stage.
Settlement on the destination chain
. After routing and conversion steps are completed, the backend executes settlement on the destination chain.
. Funds are delivered to a fresh destination address specified in the original proof, ensuring no linkability.
. Settlement receipts, verifier logs, and transaction hashes are added to the IPFS bundle and stored permanently on Filecoin via Lighthouse.
Verification and auditability
. Anyone with the Bridge Hash can fetch the corresponding IPFS/Filecoin bundle and verify the proofs.
. On-chain events only reference the Bridge Hash and cryptographic commitments.
. All bridge activity has a complete, immutable history stored via Lighthouse on Filecoin, preserving transparency without revealing identity.
Privacy and security properties
. Fresh ephemeral keys for every bridge request.
. No correlation between source wallet and destination wallet.
. Minimal on-chain data exposure.
. Permanent, tamper-evident storage of all proofs and logs on Filecoin using Lighthouse.
. Architecture is upgradeable to zkSTARK proofs for stronger privacy guarantees.
Outcome
. Users can bridge assets privately, with no linkable traces between chains.
. Developers and auditors can verify correctness using only the Bridge Hash and public CIDs.
. The system maintains strong privacy, verifiable transparency, and permanent storage through Lighthouse and Filecoin.
🔒Privacy infra is still early, and @ZKForge_io is building a full stack for it.
Zero-knowledge STARK logins, encrypted payments via the x402 protocol, ZK search, and Filecoin-backed data so builders can plug a “privacy layer” into their apps.
Chart: https://t.co/4wcXwzy5iX
#DYOR