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The ValidationProof struct represents a cryptographic proof that a subject has been validated at a specific sequence number. It contains all the metadata needed to verify the validation chain.

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Structure

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subject_id
DigestIdentifier
required
The identifier of the subject being validated.
​
schema_id
String
required
The identifier of the schema used to validate the subject.
​
namespace
String
required
The namespace of the subject being validated.
​
name
String
required
The name of the subject being validated.
​
subject_public_key
KeyIdentifier
required
The identifier of the public key of the subject being validated.
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governance_id
DigestIdentifier
required
The identifier of the governance contract associated with the subject being validated.
​
genesis_governance_version
u64
required
The version of the governance contract that created the subject being validated.
​
sn
u64
required
The sequence number of the subject being validated.
​
prev_event_hash
DigestIdentifier
required
The identifier of the previous event in the validation chain.
​
event_hash
DigestIdentifier
required
The identifier of the current event in the validation chain.
​
governance_version
u64
required
The version of the governance contract used to validate the subject.

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Creation Methods

Validation proofs can be created for different types of events:

​
Genesis Event

let validation_proof = ValidationProof::new_from_genesis_event(
    start_request,
    event_hash,
    governance_version,
    subject_id,
);

​
Transfer Event

let validation_proof = ValidationProof::new_from_transfer_event(
    &subject,
    sn,
    prev_event_hash,
    event_hash,
    governance_version,
    subject_public_key,
);

​
Standard Event

let validation_proof = ValidationProof::new(
    &subject,
    sn,
    prev_event_hash,
    event_hash,
    governance_version,
);

​
Usage

Validation proofs are used to:
  • Prove that a subject has been properly validated
  • Maintain the integrity of the validation chain
  • Allow validators to verify the history of a subject
  • Create a cryptographic link between consecutive events

​
Methods

​
get_metadata

Extract metadata from the validation proof: 
let metadata: Metadata = validation_proof.get_metadata();

​
is_similar

Check if two validation proofs represent the same validation: 
if validation_proof1.is_similar(&validation_proof2) {
    // Same validation
}
  • Event - Events that are validated
  • Metadata - Event metadata extracted from validation proof
  • DigestIdentifier - Cryptographic identifier
  • KeyIdentifier - Public key identifier
  • Subject - The subject being validated

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