resultApproval.go

package flow

import (
	"github.com/onflow/crypto"
)

// Attestation confirms correctness of a chunk of an exec result
type Attestation struct {
	BlockID           Identifier // ID of the block included the collection
	ExecutionResultID Identifier // ID of the execution result
	ChunkIndex        uint64     // index of the approved chunk
}

// ID generates a unique identifier using attestation
func (a Attestation) ID() Identifier {
	return MakeID(a)
}

// ResultApprovalBody holds body part of a result approval
type ResultApprovalBody struct {
	Attestation
	ApproverID           Identifier       // node id generating this result approval
	AttestationSignature crypto.Signature // signature over attestation, this has been separated for BLS aggregation
	Spock                crypto.Signature // proof of re-computation, one per each chunk
}

// PartialID generates a unique identifier using Attestation + ApproverID
func (rab ResultApprovalBody) PartialID() Identifier {
	data := struct {
		Attestation Attestation
		ApproverID  Identifier
	}{
		Attestation: rab.Attestation,
		ApproverID:  rab.ApproverID,
	}

	return MakeID(data)
}

// ID generates a unique identifier using ResultApprovalBody
func (rab ResultApprovalBody) ID() Identifier {
	return MakeID(rab)
}

// ResultApproval includes an approval for a chunk, verified by a verification node
type ResultApproval struct {
	Body              ResultApprovalBody
	VerifierSignature crypto.Signature // signature over all above fields
}

// ID generates a unique identifier using result approval body
func (ra ResultApproval) ID() Identifier {
	return MakeID(ra.Body)
}

// Checksum generates checksum using the result approval full content
func (ra ResultApproval) Checksum() Identifier {
	return MakeID(ra)
}