takiAA / unique-cell

Unique cell on CKB

Unique Cell

A unique cell can be created on the Nervos CKB through TypeID which makes sure the unique cell cannot be updated or destroyed.

The unique cell data can store any data, such as XUDT token information and the contract will not check the content and format of the cell data.

Unique Type Script

unique type script:
  code_hash: 
    unique_type
  args:
    type_id[0..20]

XUDT Information

The following is the info data format recommended by XUDT：

# general

# The number of decimals the XUDT token uses - e.g. 8, means to divide the token amount by 100000000 to get its user representation. 
# 0xF0-0xFF reserved
decimal: uint8  

# The length of the name in bytes
len: uint8

# The name of the XUDT token - e.g. USDT, means to convert 'Tether USDT' to hex form '0x5465746865722055534454'
name: variable max 255

# The length of the symbol in bytes
len: uint8

# The symbol of the XUDT token - e.g. USDT, means to convert 'USDT' to hex form '0x55534454'
symbol: variable max 255

# optional
...

Development

Build contracts:

make build

Run tests:

make test