Detailed Explanation of ABI Types

Built-in ABI Types

Here are the built-in ABI types, a total of 31:

• Basic types: name, bytes, string
• Numeric types: bool, int8, uint8, int16, uint16, int32, uint32, int64, uint64, int128, uint128, varint32, varuint32, float32, float64, float128
• Time-related: time_point, time_point_sec, block_timestamp_type
• Cryptographic function related: checksum160, checksum256, checksum512, public_key, signature
• Token related: symbol, symbol_code, asset, extended_asset

The most commonly used are the following:

name bytes string bool uint64 checksum256
public_key signature symbol asset extended_asset

Correspondence Table of Built-in Data Types in ABI and AssemblyScript

The following table shows the correspondence between built-in types in ABI and types in AssemblyScript. If it is not built-in, it is defined in the relevant module in the asm-chain nodejs package and can be referenced using the structure as follows:

import {
    Name,
    Asset,
    Symbol,
    SymbolCode,

    VarUint32,
    printString,
    Checksum160,
    Checksum256,
    Checksum512,

    PublicKey,
    Signature,
    TimePoint,
    TimePointSec,
    ExtendedAsset,
    I128,
    U128,
} from "asm-chain";

Relationship table:

ABI Type	AssemblyScript Type	Module
bool	bool	Built-in
int8	i8	Built-in
uint8	u8	Built-in
int16	i16	Built-in
int32	i32	Built-in
uint32	u32	Built-in
int64	i64	Built-in
uint64	u64	Built-in
int128	I128	Built-in
uint128	I128	Built-in
varint32
varuint32	VarUint32	varint
float64	f64	Built-in
float128	Float128	float128
time_point	TimePoint	time
time_point_sec	TimePointSec	time
name	Name	name
bytes	u8[]	Built-in
string	string	Built-in
checksum160	Checksum160	crypto
checksum256	Checksum256/u256	crypto
checksum512	Checksum512	crypto
public_key	PublicKey	crypto
signature	Signature	crypto
symbol	Symbol	asset
symbol_code	SymbolCode	asset
asset	Asset	asset
extended_asset	ExtendedAsset	asset

Special ABI Types

optional

variant

binaryextension