Payload

An Avalanche Unsigned Warp Message already includes a networkID, sourceChainID, and payload field. The payload field can be parsed into one of the types included in this package to be further handled by the VM.

Hash

Hash:

+-----------------+----------+-----------+
|         codecID :   uint16 |   2 bytes |
+-----------------+----------+-----------+
|          typeID :   uint32 |   4 bytes |
+-----------------+----------+-----------+
|            hash : [32]byte |  32 bytes |
+-----------------+----------+-----------+
                             |  38 bytes |
                             +-----------+

• codecID is the codec version used to serialize the payload and is hardcoded to 0x0000
• typeID is the payload type identifier and is 0x00000000 for Hash
• hash is a hash from the sourceChainID. The format of the expected preimage is chain specific. Some examples for valid hash values are:
  • root of a merkle tree
  • accepted block hash on the source chain
  • accepted transaction hash on the source chain

AddressedCall

AddressedCall:

+---------------------+--------+----------------------------------+
|             codecID : uint16 |                          2 bytes |
+---------------------+--------+----------------------------------+
|              typeID : uint32 |                          4 bytes |
+---------------------+--------+----------------------------------+
|       sourceAddress : []byte |                 4 + len(address) |
+---------------------+--------+----------------------------------+
|             payload : []byte |                 4 + len(payload) |
+---------------------+--------+----------------------------------+
                               | 14 + len(payload) + len(address) |
                               +----------------------------------+

• codecID is the codec version used to serialize the payload and is hardcoded to 0x0000
• typeID is the payload type identifier and is 0x00000001 for AddressedCall
• sourceAddress is the address that sent this message from the source chain
• payload is an arbitrary byte array payload