Implement API to record buying of an impact product

[pratiksardar]

Once a user buys a RWIP then that should be recorded and saved to DB with all details like
Buyer address
Transaction ID
Date of purchase
Price
Seller address
NFT bought
and others as per schema

[shamoo53]

hi, i would like to work on this issue
am very experienced with Nestjs, express, MongoDB, PostgreSQl, Python, Cairo, Rust
kindly assign this issue