Hi,
In my app for Supply Chain Management, there is equipmentNumber, which should be a global unique ID. How can I achieve this using Javascript?
E.g. the smart contract in Javascript as below:
...
'use strict';
// Fabric smart contract classes
const { Contract, Context } = require('fabric-contract-api');
/**
* Define smart contract by extending Fabric Contract class
*
*/
class PharmaLedgerContract extends Contract {
constructor() {
// Unique namespace pcn - PharmaChainNetwork when multiple contracts per chaincode file
super('org.pln.PharmaLedgerContract');
}
/**
* Instantiate to set up ledger.
* @param {Context} ctx the transaction context
*/
async instantiate(ctx) {
// No default implementation for this example
console.log('Instantiate the PharmaLedger contract');
}
/**
* Create pharma equipment
*
* @param {Context} ctx the transaction context
* @param {String} equipment manufacturer
* @param {String} equipmentNumber for this equipment
* @param {String} equipment name
* @param {String} equipment commercial name
* @param {String} equipment composition
* @param {String} equipment common side effects
* @param {String} equipment cost
* @param {String} equipment retailed cost
* @param {String} equipment quantity
* @param {String} name of the equipment owner
*/
async makeEquipment(ctx, manufacturer, equipmentNumber, equipmentName, equipmentCommercialName, equipmentComposition, equipmentCommonSideEffects, equipmentCost, equipmentQuantity, equipmentRetailedCost,ownerName) {
console.info('============= START : makeEquipment call ===========');
let dt = new Date().toString();
const equipment = {
equipmentNumber,
manufacturer,
equipmentName,
equipmentCommercialName,
equipmentComposition,
equipmentCommonSideEffects,
equipmentCost,
equipmentQuantity,
equipmentRetailedCost,
equipmentTotalCost: '0',
previousQuantityBalance: '0',
currentQuantityBalance: '0',
ownerName,
previousOwnerType: 'MANUFACTURER',
currentOwnerType: 'MANUFACTURER',
createDateTime: dt,
lastUpdated: dt
};
await ctx.stub.putState(equipmentNumber, Buffer.from(JSON.stringify(equipment)));
console.info('============= END : Create equipment ===========');
}
