Module chain 

Remote chain protocol methods (tags 76-103).

Translates between SCALE-encoded binary messages from the product-SDK and JSON-RPC for smoldot. Each function either:

• Parses a smoldot JSON-RPC notification and encodes the result as SCALE, or
• Encodes a SCALE response for a given chain request tag.

All response messages follow the envelope: request_id (SCALE str) + response_tag (u8) + v1 (0x00) + payload

Structs

RuntimeSpec

Parsed runtime specification fields.

StorageResultItem

A single storage result item returned in OperationStorageItems.

Enums

ChainHeadEvent

Strongly-typed representation of every chainHead_v1_followEvent variant.

RuntimeInfo

Runtime information attached to Initialized / NewBlock events.

Constants

TAG_CHAIN_HEAD_BODY_REQ

TAG_CHAIN_HEAD_BODY_RESP

TAG_CHAIN_HEAD_CALL_REQ

TAG_CHAIN_HEAD_CALL_RESP

TAG_CHAIN_HEAD_CONTINUE_REQ

TAG_CHAIN_HEAD_CONTINUE_RESP

TAG_CHAIN_HEAD_FOLLOW_INTERRUPT

TAG_CHAIN_HEAD_FOLLOW_RECEIVE

TAG_CHAIN_HEAD_FOLLOW_START

TAG_CHAIN_HEAD_FOLLOW_STOP

TAG_CHAIN_HEAD_HEADER_REQ

TAG_CHAIN_HEAD_HEADER_RESP

TAG_CHAIN_HEAD_STOP_OP_REQ

TAG_CHAIN_HEAD_STOP_OP_RESP

TAG_CHAIN_HEAD_STORAGE_REQ

TAG_CHAIN_HEAD_STORAGE_RESP

TAG_CHAIN_HEAD_UNPIN_REQ

TAG_CHAIN_HEAD_UNPIN_RESP

TAG_CHAIN_SPEC_CHAIN_NAME_REQ

TAG_CHAIN_SPEC_CHAIN_NAME_RESP

TAG_CHAIN_SPEC_GENESIS_HASH_REQ

TAG_CHAIN_SPEC_GENESIS_HASH_RESP

TAG_CHAIN_SPEC_PROPERTIES_REQ

TAG_CHAIN_SPEC_PROPERTIES_RESP

TAG_CHAIN_TX_BROADCAST_REQ

TAG_CHAIN_TX_BROADCAST_RESP

TAG_CHAIN_TX_STOP_REQ

TAG_CHAIN_TX_STOP_RESP

Functions

bytes_to_hex

Convert raw bytes [0xab, 0xcd] to "0xabcd".

encode_chain_follow_json_event

Encode a chain-head follow event notification from raw JSON-RPC text.

encode_chain_follow_stop

Encode a synthetic follow stop event for unsupported/disconnected chains.

encode_chain_head_event

Encode a chainHead_v1_followEvent receive message (tag 79).

encode_chain_response_hex

Encode a Result(Hex(), GenericError) response.

encode_chain_response_nullable_hex

Encode a Result(Nullable(Hex()), GenericError) response.

encode_chain_response_nullable_string

Encode a Result(Nullable(str), GenericError) response.

encode_chain_response_operation_started

Encode a Result(OperationStartedResult, GenericError) response.

encode_chain_response_string

Encode a Result(str, GenericError) response.

encode_chain_response_void

Encode a Result(void, GenericError) response.

encode_chain_rpc_error

Encode a chain RPC error using the correct response tag for request_tag.

encode_chain_rpc_json_response

Encode a chain RPC response from raw JSON-RPC text using the correct chain protocol envelope for request_tag.

hex_to_bytes

Convert a "0xabcd" hex string to raw bytes [0xab, 0xcd].

parse_chain_head_json_rpc

Parse a smoldot chainHead_v1_followEvent notification into a ChainHeadEvent.