chunks

Documentation

Index

• Constants
• type ChunkAssigner
  • func NewChunkAssigner(alpha uint, protocolState protocol.State) (*ChunkAssigner, error)
  • func (p *ChunkAssigner) Assign(result *flow.ExecutionResult, blockID flow.Identifier) (*chunkmodels.Assignment, error)
  • func (p *ChunkAssigner) Size() uint
• type ChunkVerifier
  • func NewChunkVerifier(vm VirtualMachine, vmCtx fvm.Context) *ChunkVerifier
  • func (fcv *ChunkVerifier) SystemChunkVerify(vc *verification.VerifiableChunkData) ([]byte, chmodels.ChunkFault, error)
  • func (fcv *ChunkVerifier) Verify(vc *verification.VerifiableChunkData) ([]byte, chmodels.ChunkFault, error)
• type VirtualMachine

Constants

const DefaultChunkAssignmentAlpha = 5

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

Types

type ChunkAssigner

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

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

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

Assign generates the assignment error returns:

• NoValidChildBlockError indicates that no valid child block is known (which contains the block's source of randomness)
• unexpected errors should be considered symptoms of internal bugs

func (*ChunkAssigner) Size

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

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

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.View, *programs.Programs) error
}