zkp-core

;; zero-knowledge-proof - Clarity 4
;; Zero-knowledge proof verification for privacy-preserving genomic data

(define-constant ERR-INVALID-PROOF (err u100))
(define-constant ERR-VERIFICATION-FAILED (err u101))
(define-constant ERR-NOT-AUTHORIZED (err u102))

(define-map zk-proofs uint
  {
    proof-hash: (buff 64),
    commitment: (buff 64),
    prover: principal,
    proof-type: (string-ascii 50),
    created-at: uint,
    is-verified: bool
  }
)

(define-map verification-keys uint
  {
    key-hash: (buff 64),
    key-type: (string-ascii 50),
    authority: principal,
    registered-at: uint,
    is-active: bool
  }
)

(define-map proof-verifications uint
  {
    proof-id: uint,
    verifier: principal,
    verification-result: bool,
    verified-at: uint,
    verification-data: (buff 128)
  }
)

(define-map commitment-schemes uint
  {
    scheme-name: (string-utf8 100),
    algorithm: (string-ascii 50),
    security-parameter: uint,
    is-active: bool
  }
)

(define-data-var proof-counter uint u0)
(define-data-var key-counter uint u0)
(define-data-var verification-counter uint u0)
(define-data-var scheme-counter uint u0)

(define-public (submit-zk-proof
    (proof-hash (buff 64))
    (commitment (buff 64))
    (proof-type (string-ascii 50)))
  (let ((proof-id (+ (var-get proof-counter) u1)))
    (map-set zk-proofs proof-id
      {
        proof-hash: proof-hash,
        commitment: commitment,
        prover: tx-sender,
        proof-type: proof-type,
        created-at: stacks-block-time,
        is-verified: false
      })
    (var-set proof-counter proof-id)
    (ok proof-id)))

(define-public (register-verification-key
    (key-hash (buff 64))
    (key-type (string-ascii 50)))
  (let ((key-id (+ (var-get key-counter) u1)))
    (map-set verification-keys key-id
      {
        key-hash: key-hash,
        key-type: key-type,
        authority: tx-sender,
        registered-at: stacks-block-time,
        is-active: true
      })
    (var-set key-counter key-id)
    (ok key-id)))

(define-public (verify-proof
    (proof-id uint)
    (verification-data (buff 128))
    (verification-result bool))
  (let ((proof (unwrap! (map-get? zk-proofs proof-id) ERR-INVALID-PROOF))
        (verification-id (+ (var-get verification-counter) u1)))
    (map-set proof-verifications verification-id
      {
        proof-id: proof-id,
        verifier: tx-sender,
        verification-result: verification-result,
        verified-at: stacks-block-time,
        verification-data: verification-data
      })
    (if verification-result
        (map-set zk-proofs proof-id
          (merge proof { is-verified: true }))
        true)
    (var-set verification-counter verification-id)
    (if verification-result
        (ok verification-id)
        ERR-VERIFICATION-FAILED)))

(define-public (register-commitment-scheme
    (scheme-name (string-utf8 100))
    (algorithm (string-ascii 50))
    (security-parameter uint))
  (let ((scheme-id (+ (var-get scheme-counter) u1)))
    (map-set commitment-schemes scheme-id
      {
        scheme-name: scheme-name,
        algorithm: algorithm,
        security-parameter: security-parameter,
        is-active: true
      })
    (var-set scheme-counter scheme-id)
    (ok scheme-id)))

(define-public (revoke-verification-key (key-id uint))
  (let ((key (unwrap! (map-get? verification-keys key-id) ERR-NOT-AUTHORIZED)))
    (asserts! (is-eq tx-sender (get authority key)) ERR-NOT-AUTHORIZED)
    (ok (map-set verification-keys key-id
      (merge key { is-active: false })))))

(define-read-only (get-zk-proof (proof-id uint))
  (ok (map-get? zk-proofs proof-id)))

(define-read-only (get-verification-key (key-id uint))
  (ok (map-get? verification-keys key-id)))

(define-read-only (get-proof-verification (verification-id uint))
  (ok (map-get? proof-verifications verification-id)))

(define-read-only (get-commitment-scheme (scheme-id uint))
  (ok (map-get? commitment-schemes scheme-id)))

(define-read-only (generate-commitment (data (buff 128)))
  (ok (sha256 data)))

(define-read-only (validate-principal (p principal))
  (principal-destruct? p))

(define-read-only (format-proof-id (proof-id uint))
  (ok (int-to-ascii proof-id)))

(define-read-only (parse-proof-id (id-str (string-ascii 20)))
  (string-to-uint? id-str))

(define-read-only (get-bitcoin-block)
  (ok burn-block-height))