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Four Actors

┌──────────┐    ┌──────────┐    ┌──────────┐    ┌──────────┐
│  Issuer  │───▶│ Protocol │───▶│  Holder  │◀───│ Verifier │
└──────────┘    └──────────┘    └──────────┘    └──────────┘
     │                │                              │
     │  Creates       │  Stores                      │  Queries
     │  schemas &     │  attestations                │  & validates
     │  attestations  │  on-chain                    │
Issuer: Creates schemas and issues attestations (e.g., KYC provider) Protocol: On-chain smart contract storing attestations Holder: Receives attestations linked to their address Verifier: Queries and validates attestations

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Attestation Flow

  1. Schema Creation - Issuer defines data structure
  2. Attestation - Issuer creates signed claim about a subject
  3. Storage - Protocol stores attestation on-chain
  4. Verification - Anyone can query and verify

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Key Features

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BLS Delegation

Sign attestations off-chain, submit on-chain. The submitter pays gas, not the attester.

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Economic Security

Authority registration requires stake, preventing Sybil attacks.

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Resolvers

Optional validation logic before attestations are stored (e.g., payment verification).

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Contract Architecture

Protocol Contract: Core attestation engine
  • Schema registration
  • Attestation creation/revocation
  • BLS signature verification
Authority Contract: Trust management
  • Authority registration with payment
  • Resolver interface for custom validation

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Next Steps

Quickstart

Create your first attestation

Schemas

Learn about schema design