Blockchain Development for Finance Projects

Writing the viewLC method

Next, let's look at the method that will fetch the details of the LCs issued by the bank on the blockchain. To do so, we'll fetch the LC details from the LC Master smart contract by invoking the smart contract viewLC method, as follows:

1. We start our viewLC method by defining the contract instance, similarly to the last method, as follows:

let app = this; var lastLC; var contract = new this.web3.eth.Contract(this.LCMaster.abi,this.LCMaster.address);

2. The first contract call is to the lengthLC method. This method returns the number of LCs that have been created in the LCMaster contract. This number is the length of the LCDoc array. The code can be seen here:

contract.methods.lengthLC().call().then(function(response){ ...