Module filecoin_proofs::pieces

Structs

• EmptySource
• PieceAlignment

Functions

• compute_comm_d
• get_aligned_source
  Given an enumeration of pieces in a staged sector and a piece to be added (represented by a Read and corresponding length, in UnpaddedBytesAmount) to the staged sector, produce a new Read and UnpaddedBytesAmount pair which includes the appropriate amount of alignment bytes for the piece to be written to the target staged sector.
• get_piece_alignment
  Given a number of bytes already written to a staged sector (ignoring bit padding) and a number of bytes (before bit padding) to be added, return the alignment required to create a piece where len(piece) == len(sector size)/(2^n) and sufficient left padding to ensure simple merkle proof construction.
• get_piece_start_byte
  Given a list of pieces, find the byte where a given piece does or would start.
• piece_hash
• sum_piece_bytes_with_alignment
  Given a list of pieces, sum the number of bytes taken by those pieces in that order.
• verify_pieces
  Verify that the provided piece_infos and comm_d match.
• zero_padding
  Create a padding PieceInfo of size size.