- npm. https://www.npmjs.com/get-npm
- truffle. Once you have npm run:
npm install -g truffle
To install a node you should simply follow the wiki here.
Once installed, start it up pointing to regtest (to avoid the need to sync with testnet or mainnet).
If you are using the fatjar you should simply run the following command:
java -cp <PATH-TO-THE-RSKJ-FATJAR> co.rsk.Start --regtest
You will have to configure the network were you will be deploying your contracts. To do so go to truffle-config.js and uncomment the existing networks or add a new one. The file comes with a thourough explanation on how to do it.
To configure the default regtest rskj network you can use this:
rsk: {
host: "127.0.0.1",
port: 4444,
network_id: "*"
}
Start a console and use truffle to deploy your contract:
$truffle console --network development
truffle(development)> migrate --reset
Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.
Starting migrations...
======================
1_initial_migration.js
======================
2_hello.js
==========
> contract address: 0x9d4f182E71e3c19f3b706afB78F103C6175a517a
truffle(development)>
The value for network is configure in truffle-config.js write doen the contract address as you will need it to interact with it!!!
Start a console and use truffle and web3js to interact with the previously deployed contract:
$truffle console --network development
truffle(development)> var hello;
truffle(development)> Hello.at('0x9d4f182E71e3c19f3b706afB78F103C6175a517a').then((i) => hello = i);
truffle(development)> hello.getGreeting()
'hello world'
truffle(development)> hello.setGreeting('hola cryptoPatagonia!')
{ tx: '0x25ed67f19fde3a2bec1625254ae339209c2fca83ec37534ac746fab7921ca409',
receipt:
{ transactionHash: '0x25ed67f19fde3a2bec1625254ae339209c2fca83ec37534ac746fab7921ca409',
transactionIndex: 0,
blockHash: '0xe01985f63575aeaaf9d12ea9702e70c876e324d34c18b64f694b8c7e987efaf1',
blockNumber: 14,
from: '0x20931a15dae5a194cde4a568892c907a5de587e8',
to: '0x9d4f182e71e3c19f3b706afb78f103c6175a517a',
gasUsed: 29480,
cumulativeGasUsed: 29480,
contractAddress: null,
logs: [],
status: true,
logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
v: '0x1c',
r: '0xf16585dfc97a0dcdec86439975c04e26ee7feec66001cf70973f84b2e1c849fd',
s: '0x5142de084db57bee1f74abf6967389654ee263a0236e60f8e7e98a53ce1f9fbd',
rawLogs: [] },
logs: [] }
truffle(development)> hello.getGreeting()
'hola cryptoPatagonia!'
As you can see, the original value of greet was the one we set in the constructor, but we were able to change it by calling the set method, which created a transaction to persist the storage change.