Credibly neutral healthcare rails on Ethereum and Base.
Prometheus Chains is an open protocol for healthcare that brings patient-owned data and instant claim payments onchain.
- Patient Records: anchored on Ethereum L1 for integrity, encrypted on Base L2 for privacy.
- Claims & Payments: providers submit claims, rules enforce coverage, and USDC settles in seconds.
- Open Standards: no gatekeepers — anyone can build interoperable healthcare apps on these rails.
| Module | Description | Demo |
|---|---|---|
| Patient Web MVP | Encrypts and anchors patient FHIR records across L1/L2 | Launch Demo |
| Claims Web (Admin + Provider Console) | Providers submit claims, rules enforce coverage, payments auto-settle | Launch Demo |
| Contract | Address | Description |
|---|---|---|
| PatientRecordFactory | 0x5422907680cEa48620F9890AD7d664eB44F355a1 |
Deploys one PatientRecord per wallet. |
| PatientRecord (example) | 0x26A9c953999027501DD12CC5d1025471147E4cc9 |
Anchors ordered SHA-256 hashes of canonical (plaintext) FHIR records (integrity & ordering only; no PHI). |
| Contract | Address | Description |
|---|---|---|
| EEVault (Encrypted Event Vault) | 0x85f60DF7369578da188c23dD6a7D6D49C056254b |
Stores AES-GCM ciphertext by a secret 16-byte tag. Returns envelopeId = keccak256(ciphertext) for content-addressing. (Storage & private lookup; no plaintext.) |
| ClaimEngine | 0xadda43C437Bb9A740a4D5972e0432e529a08DA7F |
Validates provider claims and executes instant payouts via Bank. |
| ProviderRegistry | 0xa6B53A9A35c70a097666f5C9A31B1f9E9b66A728 |
Whitelist of providers and active-year windows. |
| Enrollment | 0xf867c7bC6F1D21700Ac4aEEa47F2AD0d6d86e3DC |
Patient coverage registry. |
| Rules | 0xDfB1093B0b4a7B518ecf6904fA9388D55f6a0503 |
Price & per-year rules for codes (e.g., telehealth, annual). |
| Bank (USDC Vault) | 0x313AB0d2Bc8e03a7011a34CeBfe3eE26EF518e0b |
Holds USDC and executes instant claim payouts. |
- protocol-medrec – Solidity contracts for patient-owned records (PatientRecord + EEVault interface).
- protocol-claims – Solidity contracts for instant claim adjudication and settlement.
- patient-web – MetaMask MVP for anchoring & restoring encrypted records.
- claims-web – Admin + Provider portal for live claim submissions and payments.
- standards – Canonicalization (stable stringify), vault tags, and claims data specs.
- L1 (Ethereum) — Append-only PatientRecord: write only
seq+contentHash = sha256(canonical FHIR JSON). - L2 (Base) — EEVault stores ciphertext by a secret tag (16 bytes).
envelopeId = keccak256(ciphertext)enables content-addressing without plaintext. - Device — Derives
{tag, key, nonce}from a one-time EIP-712 signature +(recordAddr, index); encrypts with AES-256-GCM; decrypts and verifiessha256(pt) == contentHashAt(i)during restore. - Claims (L2) — Provider submits
(patientId: bytes32, code, year)→ClaimEnginechecks ProviderRegistry, Enrollment, and Rules → pays via Bank or emits a reasoned rejection (e.g., “bank underfunded”, “max per year reached”). No per-claim patient identity stored on-chain.
Modern healthcare is built on two broken pillars — data and payments.
Clinical data is trapped in silos, making every connection fragile. Patients see fragments of their own history spread across incompatible EMRs. Providers spend hours faxing records and reconciling mismatched charts. Innovators face gatekeepers at every API door.
Payments are just as fractured. Claims take weeks to settle, eligibility rules are hidden behind clearinghouses, and billions are wasted each year on manual coding and denials. Every inefficiency in healthcare traces back to one of these two foundations — who holds the data, and who controls the money.
Prometheus Chains rebuilds those foundations onchain:
- Data: patient-owned medical records anchored on Ethereum for integrity and encrypted on Base for privacy.
- Payments: claims processed by transparent, programmable contracts that enforce rules and settle instantly in USDC.
Once the rails for data and payments exist as open, credibly neutral infrastructure, everything else in healthcare — from AI diagnostics to care coordination and research — becomes possible.
Prometheus Chains turns Ethereum and Base into the trust layer for medicine, enabling interoperability, transparency, and automation at a human scale.
- Security issues → info@prometheuschains.org
- Discussions → Open Discussion
- Contributions → look for
good first issuetags across repos
Apache-2.0 — open-source public good.