chunks

package
v0.14.13 Latest Latest
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Published: May 8, 2021 License: AGPL-3.0 Imports: 20 Imported by: 3

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Constants

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const DefaultChunkAssignmentAlpha = 1

DefaultChunkAssignmentAlpha is the default number of verifiers that should be assigned to each chunk. DISCLAIMER: the current value is not necessarily suitable for production

Variables

This section is empty.

Functions

func IsValidVerifer added in v0.9.6

func IsValidVerifer(assignment *chunkmodels.Assignment, chunk *flow.Chunk, approver flow.Identifier) bool

IsValidVerifer returns true if the approver was assigned to the chunk

Types

type ChunkAssigner added in v0.14.0

type ChunkAssigner struct {
	// contains filtered or unexported fields
}

ChunkAssigner implements an instance of the Public Chunk Assignment algorithm for assigning chunks to verifier nodes in a deterministic but unpredictable manner. It implements the ChunkAssigner interface.

func NewChunkAssigner added in v0.14.0

func NewChunkAssigner(alpha uint, protocolState protocol.State) (*ChunkAssigner, error)

NewChunkAssigner generates and returns an instance of the Public Chunk Assignment algorithm. Parameter alpha is the number of verifiers that should be assigned to each chunk.

func (*ChunkAssigner) Assign added in v0.14.0

func (p *ChunkAssigner) Assign(result *flow.ExecutionResult, blockID flow.Identifier) (*chunkmodels.Assignment, error)

Assign generates the assignment

func (*ChunkAssigner) Size added in v0.14.0

func (p *ChunkAssigner) Size() uint

Size returns number of assignments

type ChunkVerifier

type ChunkVerifier struct {
	// contains filtered or unexported fields
}

ChunkVerifier is a verifier based on the current definitions of the flow network

func NewChunkVerifier

func NewChunkVerifier(vm VirtualMachine, vmCtx fvm.Context) *ChunkVerifier

NewChunkVerifier creates a chunk verifier containing a flow virtual machine

func (*ChunkVerifier) SystemChunkVerify

func (fcv *ChunkVerifier) SystemChunkVerify(vc *verification.VerifiableChunkData) ([]byte, chmodels.ChunkFault, error)

SystemChunkVerify verifies a given VerifiableChunk corresponding to a system chunk. by executing it and checking the final state commitment It returns a Spock Secret as a byte array, verification fault of the chunk, and an error. Note: SystemChunkVerify should only be executed on system chunks. It returns an error if it is invoked on non-system chunks.

func (*ChunkVerifier) Verify

Verify verifies a given VerifiableChunk corresponding to a non-system chunk. by executing it and checking the final state commitment It returns a Spock Secret as a byte array, verification fault of the chunk, and an error. Note: Verify should only be executed on non-system chunks. It returns an error if it is invoked on system chunks.

type VirtualMachine

type VirtualMachine interface {
	Run(fvm.Context, fvm.Procedure, state.Ledger, *fvm.Programs) error
}

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