SCALE

Types

golang	notes	example
[]byte	length prefixed byte array with length as u32 compact integer
string	same as []byte
[...]byte	appended to the result
bool	1 byte, 0 for false, 1 for true
Object{}	concatenation of fields
*Object{}	Option. 0 for nil, 1 for Object{}. if 1 - decode Object{}
uint8	compact u8 [TODO no need for compact u8]
uint16	compact u16
uint32	compact u32
uint34	compact u64
*uint8	Option (0 for nil, 1 otherwise), followed by compact u8	&64 -> 01FC; &255 -> 01FD03
*uint16	Option (0 for nil, 1 otherwise), followed by compact u16	&255 -> 01FD03
*uint32	Option (0 for nil, 1 otherwise), followed by compact u32	&255 -> 01FD03
*uint64	Option (0 for nil, 1 otherwise), followed by compact u64	&255 -> 01FD03
[]uint16	length prefixed (compact u32) followed by compact u16s	[4, 15, 23, u16::MAX] -> 10103C5CFEFF0300
[]uint32	length prefixed (compact u32) followed by compact u32s	[4, 15, 23, u32::MAX] -> 10103C5C03FFFFFFFF
[]uint64	length prefixed (compact u32) followed by compact u64s	[4, 15, 23, u64::MAX] -> 10103C5C13FFFFFFFFFFFFFFFF
[...]Object	array with objects. encoded by consecutively encoding every object
[]Object	slice with objects. prefixed with compact u32

Not implemented:

• pointers to arrays and slices
• slices with pointers
• enumerations
• fixed width integers

Code generation

go install github.com/spacemeshos/go-scale/scalegen

//go:generate scalegen will discover all struct types and derive EncodeScale/DecodeScale methods. To avoid struct auto-discovery use -types=U8,U16.