🧩 BCS

Type struct { amount: u64, recipient: address, memo: option<string>, tags: vector<u8> }

Types: u8, u16, u32, u64, u128, u256, bool, string, address, vector<T>, option<T>, [T; N], (A, B), struct { name: T, … }, enum { A, B(T), C { x: T } }. Move names such as 0x1::string::String, 0x2::object::ID and 0x1::option::Option<T> also work.

Encode

Value (JSON) { "amount": "1000000000", "recipient": "0x2", "memo": "hello", "tags": "0x0102" }

Numbers above u32 can be strings; bytes (vector<u8>) can be a hex string; option is null or the value; an enum is "Variant" or { "Variant": value }.

Decode

BCS bytes (hex or base64)