This is the JS file containing the function(s) you wish to run on Orbs Lambda, as well as the definitions of the triggers.
General structure
// imports of local files and [supported dependencies]
const {conf} = require("./config.js");
const abi = require('./abi.js') // [{"inputs":[...]...}...]
// The task functions you wish to run on Lambda, as well as other helper functions you may implement.
async function myScheduledTask(web3, storage, guardians, config) {
const contract = new web3.eth.Contract(abi, config.contractAddress)
contract.methods.myMethod(config.methodParams).send()
}
async function myEventTask(web3, storage, guardians, config, event) {
console.log("Event emitted!", event)
const sender = web3.eth.abi.decodeParameter('address', event.topics[1]);
if (guardians.include(sender)) storage.set(new Date().getTime(), event) // save the event in local storage if it was emitted by one of Orbs guardians
}
// A registration function with binds between task functions and triggers
module.exports.register = function (engine) {
// run myScheduledTask every day on Ethereum network, with "conf" as configuration
engine.onSchedule(myScheduledTask, "1d", 'ethereum', conf)
// run myEventTask whenever event1 or event2 on myContract are emitted
engine.onEvent(myEventsTask, myContractAddress, abi, ["event1", "event2"], 'polygon', conf)
}
That's it! This is the minimal format you need to follow in order to trigger your tasks, in whatever way you wish!
