VEP 8: AccountBlock Data Content Type Definition

Background

In general, the data field in account block can be used to carry additional information to meet specific demands when sending transaction through tx_sendRawTx API. This document explains the content definition in details.

Implementation

We propose to set a 2-byte content type flag at beginning of data field to indicate what type of data is followed.

Content type is a uint16 number stored in big endian format. Number 1 (0x0001) - 2048 (0x0800) are reserved and should not be used by a third party.

Restriction

It is known that content type might be occasionally mis-recognized under the situation calling a smart contract, due to messing-up with the first 2 bytes of a hitting method hash.

Defined Types

General Type

Type	Type(Hex)	Description
Binary data	0x0001	Reserved. Not in use.

Custom Type

Type	Type(Hex)	Description
Vite Grin wallet index	0x8001	Data of Grin transaction index
ViteX gateway data	0x0bc3	Data of cross-chain transaction of ViteX gateway