jam.types.work.refine_context module

Refine context types for the JAM protocol.

class jam.types.work.refine_context.OpaqueHashes(initial: Sequence[T] = [], codec: Codec[T] | None = None)[source]

Bases: Vector[ByteArray32]

static decode_from(buffer: bytes | bytearray | memoryview, offset: int = 0) → Tuple[Vector[T], int]

Decode from buffer. Must be implemented by subclasses or added via decorator.

Parameters:

  • buffer – Buffer to decode from

  • offset – Starting position in buffer

Returns:

  • The decoded value

  • Number of bytes read

Return type:

Tuple containing

class jam.types.work.refine_context.RefineContext(anchor: ByteArray32, state_root: ByteArray32, beefy_root: ByteArray32, lookup_anchor: ByteArray32, lookup_anchor_slot: U32, prerequisites: OpaqueHashes)[source]

Bases: Codable, JsonSerde

Refine context structure.

anchor: ByteArray32
state_root: ByteArray32
beefy_root: ByteArray32
lookup_anchor: ByteArray32
lookup_anchor_slot: U32
prerequisites: OpaqueHashes
__init__(anchor: ByteArray32, state_root: ByteArray32, beefy_root: ByteArray32, lookup_anchor: ByteArray32, lookup_anchor_slot: U32, prerequisites: OpaqueHashes) → None

Initialize the Codable.

Parameters:

  • codec – Optional codec to use for encoding/decoding

  • enc_sequence – Optional function that returns sequence of fields to encode

static decode_from(buffer: bytes | bytearray | memoryview, offset: int = 0) → Tuple[T, int]

Decode from buffer. Must be implemented by subclasses or added via decorator.

Parameters:

  • buffer – Buffer to decode from

  • offset – Starting position in buffer

Returns:

  • The decoded value

  • Number of bytes read

Return type:

Tuple containing

encode_into(buffer: bytearray, offset: int = 0) → int

Encode into provided buffer.

encode_size() → int

Calculate number of bytes needed to encode.