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// ...



type Package struct {
ID string json:"id"
DateOfManufacture string json:"dateOfManufacture" // ISO 8601 date format
PlaceOfOrigin string json:"placeOfOrigin" // "City, Country"
CurrentStatus string json:"currentStatus"
CustomsDetails []string json:"customsDetails"
IsDamaged bool json:"isDamaged"
}



type NFT struct {
ID string json:"id"
Owner string json:"owner"
Category string json:"category" // "Antibiotic", "Painkiller", etc.
}



func (c *Contract) CreatePackage(ctx contractapi.TransactionContextInterface, id string, dateOfManufacture string, placeOfOrigin string) error {
// Ensure dateOfManufacture is in ISO 8601 format. Validations can be added here.
// Ensure placeOfOrigin is in the format "City, Country". Validations can be added here.



package := Package{
ID: id,
DateOfManufacture: dateOfManufacture,
PlaceOfOrigin: placeOfOrigin,
CurrentStatus: "CREATED",
CustomsDetails: []string{},
IsDamaged: false,
}
packageBytes, _ := json.Marshal(package)
return ctx.GetStub().PutState(id, packageBytes)
}



// ... other functions ...



func (c *Contract) MintNFT(ctx contractapi.TransactionContextInterface, id, owner, category string) error {
// Validate category if needed, e.g., ensure it matches known categories for pharmaceuticals.



nft := NFT{
ID: id,
Owner: owner,
Category: category,
}
nftBytes, _ := json.Marshal(nft)
return ctx.GetStub().PutState(id, nftBytes)
}



// ... rest of the functions ...