NFT Coding Exercise (Implement Core NFT Operations + Write Tests)

Problem: NFT Coding Exercise (Implement Core NFT Operations + Write Tests) The post only states it is an "NFT" problem and that you must write your own tests, but it does not specify required operations, I/O format, constraints, or examples. This cannot be reconstructed into a well-defined coding prompt. Per instruction, incomplete questions are ignored and not provided as a solvable prompt.