BCS (Binary Canonical Serialization)

The bcs package implements the serialization format used by all Move transactions on Cedra.

You won’t need this directly for most use cases — the SDK handles BCS internally when building and signing transactions.

Serializer

import "github.com/celerfi/cedra-go-kit/bcs"

s := &bcs.Serializer{}
s.SerializeU64(12345)
s.SerializeBytes([]byte{0x01, 0x02})  // length-prefixed (ULEB128 + bytes)
s.SerializeFixedBytes([]byte{0x01})   // no length prefix
s.SerializeULEB128(200_000)

raw := s.ToBytes()

Deserializer

d := bcs.NewDeserializer(raw)
n := d.DeserializeU64()
b := d.DeserializeBytes()

Key serialization rules

• Public keys and signatures use SerializeBytes (length-prefixed). Using SerializeFixedBytes here will cause a deserialize error on the node.
• Account addresses use SerializeFixedBytes (always 32 bytes, no prefix).
• Integers use their fixed-size variants (SerializeU8, SerializeU32, SerializeU64).