How to Migrate from Solana to the XDC Network using Solang
disable-solidity
npm install -g truffle
To verify that Truffle is installed properly, type
truffle version on a terminal. You should see something like:Truffle v5.5.27 (core: 5.5.27)
Ganache v7.4.0
Solidity v0.5.16 (solc-js)
Node v16.16.0
Web3.js v1.7.4
If you see an error instead, make sure that your npm modules are added to your path.
We need to install:
curl https://release.solana.com/v1.14.3/solana-install-init-x86_64-pc-windows-msvc.exe --output C:\solana-install-tmp\solana-install-init.exe --create-dirs
Download the binaries by navigating to https://github.com/solana-labs/solana/releases/latest, download solana-release-x86_64-pc-windows-msvc.tar.bz2, then extract the archive using WinZip or similar. Open a Command Prompt and run:
cd solana-release/
set PATH=%cd%/bin;%PATH%
solana --version
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mkdir solana-migration-xdc && cd solana-migration-xdc
Starting init...
================
> Copying project files to /home/your/path/to/solana-migration-xdc
Init successful, sweet!
Try our scaffold commands to get started:
$ truffle create contract YourContractName # scaffold a contract
$ truffle create test YourTestName # scaffold a test
http://trufflesuite.com/docs
yarn add @solana/solidity @solana/web3.js dotenv @truffle/hdwallet-provider
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- a constructor that initializes the
int32value to the giveninit_value, - a
incmethod to increment the state value, - a
getmethod to know what is the state value
Note:
Solang aims to be compatible with Solidity 0.7Write the following code to incrementer.sol:
pragma solidity ^0.7.0;
contract incrementer {
uint32 private value;
/// Constructor that initializes the `int32` value to the given `init_value`.
constructor(uint32 initvalue) {
value = initvalue;
}
/// This increments the value by `by`.
function inc(uint32 by) public {
value += by;
}
/// Simply returns the current value of our `uint32`.
function get() public view returns (uint32) {
return value;
}
}
The
Solang extension should compile the code automatically and a folder Build with 2 files: bundle.so and incrementer.abi.If the extension doesn't work and you cannot see a build folder, try running this command:
solang.exe compile contracts/incrementer.sol --target solana --output build
const { Connection, LAMPORTS_PER_SOL, Keypair } = require('@solana/web3.js');
const { Contract, Program } = require('@solana/solidity');
const { readFileSync } = require('fs');
const INCREMENTER_ABI = JSON.parse(readFileSync('./build/incrementer.abi', 'utf8'));
const PROGRAM_SO = readFileSync('./build/bundle.so');
(async function () {
console.log('Connecting to your local Solana node ...');
const connection = new Connection(
//'https://api.mainnet-beta.solana.com',
'https://api.devnet.solana.com',
//'http://localhost:8899',
'confirmed');
const payer = Keypair.generate();
console.log('Airdropping SOL to a new wallet ...');
const signature = await connection.requestAirdrop(payer.publicKey, LAMPORTS_PER_SOL);
await connection.confirmTransaction(signature, 'confirmed');
const program = Keypair.generate();
const storage = Keypair.generate();
const contract = new Contract(connection, program.publicKey, storage.publicKey, INCREMENTER_ABI, payer);
await contract.load(program, PROGRAM_SO);
console.log('Program deployment finished, deploying the incrementer contract ...');
await contract.deploy('incrementer', [1], storage, 1000);
const res = await contract.functions.inc(2);
console.log('Adding number 2 to the value', res)
const res2 = await contract.functions.get();
console.log('state: ' + res2.result);
})();
Run this command to config the devnet url for solana:
solana config set --url devnet
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Run the command:
node deployContract.js
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Go to your truffle-config.js and paste this code:
require("dotenv").config();
const { MNEMONIC } = process.env;
const HDWalletProvider = require("@truffle/hdwallet-provider");
module.exports = {
networks: {
xinfin: {
provider: () =>
new HDWalletProvider(MNEMONIC, "https://erpc.xinfin.network"),
network_id: 50,
gasLimit: 6721975,
confirmation: 2,
networkCheckTimeout: 1000000,
timeoutBlocks: 2000,
},
apothem: {
provider: () =>
new HDWalletProvider(MNEMONIC, "https://erpc.apothem.network"),
network_id: 51,
gasLimit: 6721975,
confirmation: 2,
networkCheckTimeout: 1000000,
timeoutBlocks: 2000,
},
},
mocha: {},
compilers: {
solc: {
version: "0.7.0",
},
},
};
const incrementer = artifacts.require("incrementer");
const VALUE = 1
module.exports = function(deployer) {
deployer.deploy(incrementer, [VALUE]);
};
truffle migrate --network apothem
or
truffle migrate --network xinfin
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Congrats! you have migrated a solana contract compiled with
Solang to the XDC network