| title |
actions |
requireLogin |
material |
Deploy to Loom Testnet |
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true |
| editor |
| language |
startingCode |
answer |
javascript |
| ./truffle.js |
// Initialize HDWalletProvider
const HDWalletProvider = require("truffle-hdwallet-provider");
// 1. Initialize LoomTruffleProvider
// Set your own mnemonic here
const mnemonic = "YOUR_MNEMONIC";
// Module exports to make this configuration available to Truffle itself
module.exports = {
// Object with configuration for each network
networks: {
// Configuration for mainnet
mainnet: {
provider: function () {
// Setting the provider with the Infura Rinkeby address and Token
return new HDWalletProvider(mnemonic, " https://mainnet.infura.io/v3/YOUR_TOKEN")
},
network_id: "1"
},
// Configuration for rinkeby network
rinkeby: {
// Special function to setup the provider
provider: function () {
// Setting the provider with the Infura Rinkeby address and Token
return new HDWalletProvider(mnemonic, " https://rinkeby.infura.io/v3/YOUR_TOKEN")
},
// Network id is 4 for Rinkeby
network_id: 4
},
// 2. Put here the configuration for loom_dapp_chain
}
};
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// Initialize HDWalletProvider
const HDWalletProvider = require("truffle-hdwallet-provider");
//Initialize LoomTruffleProvider
const LoomTruffleProvider = require('loom-truffle-provider');
// Set your own mnemonic here
const mnemonic = "YOUR_MNEMONIC";
// Module exports to make this configuration available to truffle itself
module.exports = {
// Object with configuration for each network
networks: {
// Configuration for mainnet
mainnet: {
provider: function () {
// Setting the provider with the Infura Rinkeby address and Token
return new HDWalletProvider(mnemonic, " https://mainnet.infura.io/v3/YOUR_TOKEN")
},
network_id: "1"
},
// Configuration for rinkeby network
rinkeby: {
// Special function to setup the provider
provider: function () {
// Setting the provider with the Infura Rinkeby address and Token
return new HDWalletProvider(mnemonic, " https://rinkeby.infura.io/v3/YOUR_TOKEN")
},
// Network id is 4 for Rinkeby
network_id: 4
},
// Configuration for Loom
loom_testnet: {
provider: function() {
const privateKey = 'YOUR_PRIVATE_KEY'
const chainId = 'extdev-plasma-us1';
const writeUrl = ' http://extdev-plasma-us1.dappchains.com:80/rpc';
const readUrl = ' http://extdev-plasma-us1.dappchains.com:80/query';
return new LoomTruffleProvider(chainId, writeUrl, readUrl, privateKey);
},
network_id: '9545242630824'
}
}
};
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In this chapter, we’re going to deploy our smart contract to the Loom Testnet, but before doing the deployment, some prep work is needed.
First, we should create our own Loom private key. The easiest way to do it is by downloading and installing Loom according to this tutorial.
Next, creating a private key is as as simple as this:
$./loom genkey -a public_key -k private_key
local address: 0x42F401139048AB106c9e25DCae0Cf4b1Df985c39
local address base64: QvQBE5BIqxBsniXcrgz0sd+YXDk=
$cat private_key
/i0Qi8e/E+kVEIJLRPV5HJgn0sQBVi88EQw/Mq4ePFD1JGV1Nm14dA446BsPe3ajte3t/tpj7HaHDL84+Ce4Dg==
Note: Never reveal your private keys! We are only doing this for simplicity's sake.
The first thing we are required to do is to initialize loom-truffle-provider. The syntax is similar to the one we've already used for HDWalletProvider:
const LoomTruffleProvider = require('loom-truffle-provider');Next, just as we did in chapter 5, we'll have to let Truffle know how to deploy on Loom testnet. To do so, let's add a new object to truffle.js
loom_testnet: {
provider: function() {
const privateKey = 'YOUR_PRIVATE_KEY'
const chainId = 'extdev-plasma-us1';
const writeUrl = 'http://extdev-plasma-us1.dappchains.com:80/rpc';
const readUrl = 'http://extdev-plasma-us1.dappchains.com:80/query';
return new LoomTruffleProvider(chainId, writeUrl, readUrl, privateKey);
},
network_id: '9545242630824'
}
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Add the line of code that initializes LoomTruffleProvider.
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Place the configuration for loom_testnet near the bottom of the file.