Blockchain Quick Start Guide

Script file (.js)

We define transactions and events in the model file, a script file that implements these transaction functions. Decorators within comments are used to annotate the functions with metadata required for transaction processing, for example:

/** * Sample transaction processor function. * @param {org.example.basic.SampleTransaction} tx The sample transaction instance. * @transaction */async function sampleTransaction(tx) {  // eslint-disable-line no-unused-vars..    emit(event);}

In the sampleTransaction function, the @param tag is followed by the resource name of the transaction that triggers the transaction processor function. @transaction marks this function as a transaction processor function.