Tamper-evident cold chain verification for pharmaceutical cargo — powered by Solana.
Cold chain disputes cost the pharmaceutical industry $35 billion annually. Centralized logs can be altered, backdated, and challenged in court. April Gate replaces thousands of mutable temperature records with a single zero-knowledge proof — recorded permanently on blockchain. Nobody can alter it. Not us, not the shipper, not anyone.
→ aprilgatehq.com · irina@aprilgatehq.com
| Repository | Description |
|---|---|
| coldchain-programs | Solana on-chain programs · device registry · shipment lifecycle · proof submission |
| coldchain-core | Reference protocol implementation · consensus types · simulation tooling · demonstration binary |
| coldchain-firmware | Device firmware demonstrating April Gate's cold-chain attestation flow — sensor reading, hardware-backed signing, and on-chain submission to Solana |
| coldchain-engine | April Gate's core intellectual property: tamper-evident shipment records coordinated across Solana and Filecoin · BFT consensus engine · ZK proof circuits · hardware firmware |
| coldchain-web | Public website, operator dashboard, and shipment verification portal |
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Hardware-signed sensors — every reading is signed by the device's ATECC608 secure element. The private key is burned into the chip at manufacture and never leaves.
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Multi-sensor consensus — sensors form a local mesh and reach Byzantine-fault-tolerant agreement on each reading, even when offline. No single sensor (or single attacker) can manipulate the record.
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Zero-knowledge attestations — at each reporting interval, sensors generate a ZK proof that confirms conditions stayed within range, without revealing the underlying operational data. Pharma's competitive logistics information stays private.
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Decentralized data archival — full signed readings and consensus results are stored on a decentralized content-addressed storage layer (Filecoin, Arweave, or equivalent), cryptographically bound to the on-chain anchor. Authorized parties can pull the full record; everyone else sees only the proof.
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On-chain anchor — the ZK proof commitment is submitted to Solana. Immutable, timestamped, verifiable by anyone. The single anchor that ties together the sensor readings, the consensus result, and the archival record.