GetAllPieceInfoForPayload returns all of the pieces containing the requested Payload CID.

GetBestPieceInfoMatch will take a list of pieces, and an optional PieceCID from a client, and will find the best piece to use for a retrieval.

GetCommonPiecesFromIdentityCidLinks will inspect a payloadCID and if it has an identity multihash, will determine which pieces contain all of the links within the decoded identity multihash block.

LinksFromIdentityCid will extract zero or more CIDs contained within a valid identity CID.

MaxIdentityCIDBytes is the largest identity CID as a PayloadCID that we are willing to decode.

MaxIdentityCIDLinks is the maximum number of links contained within an identity CID that we are willing to check for matching pieces.

EmptyChannelState is the zero value for channel state, meaning not present.

GraphsyncUnpaidRetrieval intercepts incoming requests to Graphsync.