Web3Wallet Builds For Mobile & Desktop Games
info
The Web3Wallet build option allows game developers to build Unity games that run on desktop and mobile (iOS/Android). This build uses our Web3Wallet component and contains various prefabs & scripts.
Building To Web3Wallet
Here's a video tutorial on how to start a Web3Wallet build with the SDK:
Block Number
Get the current (i.e. latest) block number.
using Web3Unity.Scripts.Library.Ethers.Providers;
using UnityEngine;
public class Web3WalletGetBlockNumber : MonoBehaviour
{
public async void BlockNumber()
{
var provider = new JsonRpcProvider("YOUR_NODE");
Debug.Log("Block Number: " + await provider.GetBlockNumber());
}
}
Gas Price
Get the current gas price for a transaction based on chain / network and RPC. Gas refers to the unit that measures the amount of computational effort required to execute specific operations on the Ethereum network, such as transferring assets between players or minting new in-game NFTs. Since each Ethereum transaction requires computational resources to execute, each transaction requires a fee. Gas refers to the fee required to execute a transaction on Ethereum, regardless of transaction success or failure. For more on gas prices, see What is gas?
using Web3Unity.Scripts.Library.Ethers.Providers;
using UnityEngine;
public class Web3WalletGetGasPrice : MonoBehaviour
{
public async void GasPrice()
{
var provider = new JsonRpcProvider("YOUR_NODE");
Debug.Log("Gas Price: " + await provider.GetGasPrice());
}
}
Gas Limit
Get the current gas limit for a transaction based on chain / network and RPC. Gas limit refers to the maximum amount of gas you are willing to consume on a transaction. More complicated in-game transactions involving smart contracts require more computational work, so they require a higher gas limit than a simple payment. For more on gas limits, see What is gas limit?
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Ethers.Providers;
using UnityEngine;
public class Web3WalletGetGasLimit : MonoBehaviour
{
public async void GasLimit()
{
var provider = new JsonRpcProvider("YOUR_NODE");
string contractAbi = "[ { \"inputs\": [ { \"internalType\": \"uint8\", \"name\": \"_myArg\", \"type\": \"uint8\" } ], \"name\": \"addTotal\", \"outputs\": [], \"stateMutability\": \"nonpayable\", \"type\": \"function\" }, { \"inputs\": [], \"name\": \"myTotal\", \"outputs\": [ { \"internalType\": \"uint256\", \"name\": \"\", \"type\": \"uint256\" } ], \"stateMutability\": \"view\", \"type\": \"function\" } ]";
string contractAddress = "0x741C3F3146304Aaf5200317cbEc0265aB728FE07";
var contract = new Contract(contractAbi, contractAddress, provider);
var gasLimit= await contract.EstimateGas("addTotal", new object[] {});
Debug.Log("Gas Limit: " + gasLimit);
}
}
info
In some instances, game developers may want to specify the gas price and gas limit for a transaction. However, if the gas parameters are left blank, the gas will default to the estimates given by MetaMask.
Nonce
Fetches the nonce of an Ethereum account.
using Nethereum.Hex.HexTypes;
using Web3Unity.Scripts.Library.Ethers.Providers;
using Web3Unity.Scripts.Library.Ethers.Signers;
using Web3Unity.Scripts.Library.Ethers.Transactions;
using UnityEngine;
public class Web3WalletGetNonce : MonoBehaviour
{
public async void Nonce()
{
var provider = new JsonRpcProvider("YOUR_NODE");
var signer = new JsonRpcSigner(provider, 0);
var tx = await signer.SendTransaction(new TransactionRequest
{
To = await signer.GetAddress(),
Value = new HexBigInteger(100000)
});
var nonce = tx.Nonce;
Debug.Log("Nonce: " + nonce);
}
}
Transfer ERC-20 Token Through Mobile and Desktop
Send an ERC-20 token transfer through a Unity desktop/mobile game.
using UnityEngine;
using Web3Unity.Scripts.Library.ETHEREUEM.EIP;
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Web3Wallet;
public class Web3WalletTransfer20Example : MonoBehaviour
{
async public void OnTransfer20()
{
// https://chainlist.org/
string chainId = "5"; // goerli
// contract to interact with
string contract = "0xc778417e063141139fce010982780140aa0cd5ab";
// value in wei
string value = "0";
// abi in json format
string abi = ABI.ERC_20;
// smart contract method to call
string method = ETH_METHOD.Transfer;
// account to send erc20 to
string toAccount = "0xdD4c825203f97984e7867F11eeCc813A036089D1";
// amount of erc20 tokens to send
string amount = "1000000000000000";
// create data to interact with smart contract
var contractData = new Contract(abi, contract);
var data = contractData.Calldata(method, new object[]
{
toAccount,
amount
});
// gas limit OPTIONAL
string gasLimit = "";
// gas price OPTIONAL
string gasPrice = "";
// send transaction
string response = await Web3Wallet.SendTransaction(chainId, contract, value, data, gasLimit, gasPrice);
print(response);
}
}
Transfer ERC-721 NFT Token Through Mobile and Desktop
Send an ERC-721 token transfer through a Unity desktop/mobile game.
using UnityEngine;
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Web3Wallet;
public class Web3WalletTransfer721 : MonoBehaviour
{
async public void OnTransfer721()
{
// https://chainlist.org/
string chainId = "503129905"; // nebula
// contract to interact with
string contractAddress = "0x0B102638532be8A1b3d0ed1fcE6eC603Bec37848";
// value in wei
string value = "0";
// abi in json format
string battle_axe_abi = "[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"approved\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"ApprovalForAll\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"burn\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"grantRole\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"renounceRole\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"revokeRole\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"previousAdminRole\",\"type\":\"bytes32\"},{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"newAdminRole\",\"type\":\"bytes32\"}],\"name\":\"RoleAdminChanged\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"}],\"name\":\"RoleGranted\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"}],\"name\":\"RoleRevoked\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"string\",\"name\":\"uri\",\"type\":\"string\"}],\"name\":\"safeMint\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"DEFAULT_ADMIN_ROLE\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"}],\"name\":\"getRoleAdmin\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"role\",\"type\":\"bytes32\"},{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"hasRole\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"MINTER_ROLE\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"tokenURI\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]";
// smart contract method to call
string method = "safeMint";
// account to send erc721 to
string toAccount = PlayerPrefs.GetString("Account");
// gas limit OPTIONAL
string gasLimit = "";
// gas price OPTIONAL
string gasPrice = "";
// uri
string uri = "ipfs://QmNn5EaGR26kU7aAMH7LhkNsAGcmcyJgun3Wia4MftVicW/1.json";
var contract = new Contract(battle_axe_abi, contractAddress);
Debug.Log("Contract: " + contract);
var calldata = contract.Calldata(method, new object[]
{
toAccount,
uri
});
Debug.Log("Contract Data: " + calldata);
// send transaction
string response = await Web3Wallet.SendTransaction(chainId, contractAddress, value, calldata, gasLimit, gasPrice);
print(response);
}
}
Transfer ERC-1155 NFT Token through Mobile and Desktop
Send an ERC-1155 token transfer through a Unity desktop/mobile game.
using UnityEngine;
using Web3Unity.Scripts.Library.ETHEREUEM.EIP;
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Web3Wallet;
public class Web3WalletTransfer1155Example : MonoBehaviour
{
public async void OnTransfer1155()
{
// https://chainlist.org/
var chainId = "5"; // goerli
// contract to interact with
var contract = "0xae283E79a5361CF1077bf2638a1A953c872AD973";
// value in wei
var value = "0";
// abi in json format
var abi = ABI.ERC_1155;
// smart contract method to call
var method = "safeTransferFrom";
// account to sent tokens to
var toAccount = PlayerPrefs.GetString("Account");
// token id to send
var tokenId = 0;
// amount of tokens to send
var amount = 1;
// bytes
byte[] dataObject = { };
// array of arguments for contract
var contractData = new Contract(abi, contract);
var data = contractData.Calldata(method, new object[]
{
PlayerPrefs.GetString("Account"),
toAccount,
tokenId,
amount,
dataObject
});
// gas limit OPTIONAL
var gasLimit = "";
// gas price OPTIONAL
var gasPrice = "";
// send transaction
var response = await Web3Wallet.SendTransaction(chainId, contract, value, data, gasLimit, gasPrice);
print(response);
}
}
Transaction Status
The GetTransactionReceipt method can be used to await the status of a submitted transaction. We take the code snippet from Transfer ERC-20 Token Through Mobile and Desktop and pass in additional logs to check for the status of the transaction.
using Nethereum.Hex.HexTypes;
using Web3Unity.Scripts.Library.Ethers.Providers;
using Web3Unity.Scripts.Library.Ethers.Signers;
using Web3Unity.Scripts.Library.Ethers.Transactions;
using UnityEngine;
public class Web3WalletGetTxStatus : MonoBehaviour
{
public async void TransactionStatus()
{
// https://chainlist.org/
string chainId = "5"; // goerli
// contract to interact with
string contract = "0xc778417e063141139fce010982780140aa0cd5ab";
// value in wei
string value = "0";
// abi in json format
string abi = ABI.ERC_20;
// smart contract method to call
string method = ETH_METHOD.Transfer;
// account to send erc20 to
string toAccount = "0xdD4c825203f97984e7867F11eeCc813A036089D1";
// amount of erc20 tokens to send
string amount = "1000000000000000";
// create data to interact with smart contract
var contractData = new Contract(abi, contract);
var data = contractData.Calldata(method, new object[]
{
toAccount,
amount
});
// gas limit OPTIONAL
string gasLimit = "";
// gas price OPTIONAL
string gasPrice = "";
// send transaction
string response = await Web3Wallet.SendTransaction(chainId, contract, value, data, gasLimit, gasPrice)
// Check the Transaction adn return a transaction code
var Transaction = await provider.GetTransactionReceipt(response.ToString());
// Debug Transaction code
Debug.Log("Transaction Code: " + Transaction.Status);
// Conditional Statement to check Transaction Status
if (Transaction.Status.ToString() == "0")
{
Debug.Log("Transaction has failed");
}
else if (Transaction.Status.ToString() == "1")
{
Debug.Log("Transaction has been successful");
}
}
}
Sign Transaction Through Mobile and Desktop
Generates a cryptographic signature for a given string or message.
string response = await Web3Wallet.Sign("hello");
print(response);
Verify Web Wallet
Verify a signed message via a Web Wallet.
using System.Text;
using Nethereum.Signer;
using Nethereum.Util;
using UnityEngine;
using Web3Unity.Scripts.Library.Web3Wallet;
public class Web3WalletSignVerify : MonoBehaviour
{
// Start is called before the first frame update
async void Start()
{
string message = "hello";
string signature = await Web3Wallet.Sign(message);
//verification
SignVerifySignature(signature, message);
}
public void SignVerifySignature(string signatureString, string originalMessage)
{
string msg = "\x19" + "Ethereum Signed Message:\n" + originalMessage.Length + originalMessage;
byte[] msgHash = new Sha3Keccack().CalculateHash(Encoding.UTF8.GetBytes(msg));
EthECDSASignature signature = MessageSigner.ExtractEcdsaSignature(signatureString);
EthECKey key = EthECKey.RecoverFromSignature(signature, msgHash);
bool isValid = key.Verify(msgHash, signature);
Debug.Log("Address Returned: " + key.GetPublicAddress());
Debug.Log("Is Valid: " + isValid);
}
}
Hosting Your Own Sign Page
You can find the Web3Wallet repo here. You can download and host this on git for free. This instantiates web3 in a webpage to allow MetaMask to connect & make transactions. We'll guide you through this process below.
Step 1: Create a GitHub account.
Step 2: Clone the Web3Wallet repo using GitHub Desktop. Press Add, Clone Repository..., and then paste in the following URL: https://github.com/ChainSafe/game-web3wallet.
-274888be575175ab1db81f2cd71f4a40.png)
-e9526f4de53484b6cb5680182e9168a9.png)
Step 3: GitHub Desktop will ask you if you want to fork the repo. When prompted, select For My Own Purposes. This will create a fork, where you can push to your own repository.
-09dc3fe25e93b57e5ebb02d32e986ed5.png)
Step 4: You will need to edit the package.json file to confirm to the directory where the signer will be found. Run the yarn install/build process for Web3Wallet. Once you are happy with your changes, press Ctrl + P, or the blue button below, to push your repository to GitHub. This stores these files online and makes them readily accessible!
Step 5: Navigate to your GitHub repository settings page and find the Pages section. From here, select Deploy from a branch, set your branch to main and the folder as root (Some users have reported that selecting gh-page branch has worked over main so please try this instead if you're experiencing errors). Press Save and wait for the repo to build. This creates a webpage with a public URL that we can access.
-46a5c304751921415afabf322ea4a97c.png)
Step 6: Lastly, update the Web3Wallet.cs file in the web3unity folder in Unity. Update the URL to point to the one created in the previous step. Once ready, the new URL will be displayed above the Build and deployment settings (seen in the image above).
-4704bca2aaebb6a3f9f4655e58c00092.png)
To add additional customizations (such as page design & colors) to the web page, you can open the repository in VSCode to parameterize the index.js & styles.css files.
info
Note: if the code for the sign page's functionalities are altered, it may cause unforeseen issues which we may have trouble assisting with.
Secure Hash Algorithm 3 (SHA-3) Through Web3Wallet
Calculates the SHA-3 of the input.
using Web3Unity.Scripts.Library.Web3Wallet;
using UnityEngine;
public class Web3WalletSha3Example : MonoBehaviour
{
void Start()
{
string message = "hello";
string hashedMessage = Web3Wallet.Sha3(message);
// 0x1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8
print(hashedMessage);
}
}
Call Custom Contracts
Call will execute a smart contract method without altering the smart contract state.
See Reading A Value From A Solidity Contract (Web3Wallet Builds) for a working example.
Here's a video tutorial on how to make read/write interactions to custom smart contracts using Web3Wallet:
Solidity Contract Example
This code snippet defines a simple smart contract example where the myTotal variable (initialized at 0) is added to (by the input value _myArg) and updated to a new total.
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract AddTotal {
uint256 public myTotal = 0;
function addTotal(uint8 _myArg) public {
myTotal = myTotal + _myArg;
}
}
Reading A Value From A Solidity Contract (Web3Wallet Builds)
Retrieves the value of a specified variable (myTotal) from a smart contract.
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Newtonsoft.Json;
using Web3Unity.Scripts.Library.Ethers.Providers;
using UnityEngine;
public class Web3WalletContractRead : MonoBehaviour
{
async public void CheckVariable()
{
string contractAbi = "[ { \"inputs\": [ { \"internalType\": \"uint8\", \"name\": \"_myArg\", \"type\": \"uint8\" } ], \"name\": \"addTotal\", \"outputs\": [], \"stateMutability\": \"nonpayable\", \"type\": \"function\" }, { \"inputs\": [], \"name\": \"myTotal\", \"outputs\": [ { \"internalType\": \"uint256\", \"name\": \"\", \"type\": \"uint256\" } ], \"stateMutability\": \"view\", \"type\": \"function\" } ]";
// address of contract
string contractAddress = "0x741C3F3146304Aaf5200317cbEc0265aB728FE07";
string method = "myTotal";
// you can use this to create a provider for hardcoding and parse this instead of rpc get instance
var provider = new JsonRpcProvider("YOUR_NODE");
var contract = new Contract(contractAbi, contractAddress, provider);
Debug.Log("Contract: " + contract);
var calldata = await contract.Call(method, new object[]
{
// if you need to add parameters you can do so, a call with no args is blank
// arg1,
// arg2
});
// display response in game
print("Contract Variable Total: " + calldata[0]);
}
}
Reading An Array From A Solidity Contract (Web3Wallet Builds)
Retrieves the array of addresses stored in a smart contract.
using Newtonsoft.Json;
using UnityEngine;
using UnityEngine.UI;
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Ethers.Providers;
public class Web3WalletGetArray : MonoBehaviour
{
public Text playerAddresses;
public async void GetArrayData()
{
// contract to interact with
string contractAddress = "0x5244d0453A727EDa96299384370359f4A2B5b20a";
// abi in json format
string abi =
"[{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_addresses\",\"type\":\"address[]\"}],\"name\":\"setStore\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"bought\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getStore\",\"outputs\":[{\"internalType\":\"address[]\",\"name\":\"\",\"type\":\"address[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]";
// smart contract method to call
string method = "getStore";
var provider = new JsonRpcProvider("YOUR_NODE");
var contract = new Contract(abi, contractAddress, provider);
var calldata = await contract.Call(method);
string json = JsonConvert.SerializeObject(calldata[0], Formatting.Indented);
string[] addresses = JsonConvert.DeserializeObject<string[]>(json);
if (addresses != null) Debug.Log("Addresses: " + addresses[0]);
if (addresses != null) playerAddresses.text = addresses[0];
}
}
Writing A Value To A Solidity Contract (Web3Wallet Builds)
Sends a transaction (using the addTotal method) to update a smart contract's state.
using Newtonsoft.Json;
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Ethers.Providers;
using Web3Unity.Scripts.Library.Web3Wallet;
using UnityEngine;
public class Web3WalletContractSend : MonoBehaviour
{
async public void AddOneToVariable()
{
string chainId = "5";
// abi in json format
public string contractAbi = "[ { \"inputs\": [ { \"internalType\": \"uint8\", \"name\": \"_myArg\", \"type\": \"uint8\" } ], \"name\": \"addTotal\", \"outputs\": [], \"stateMutability\": \"nonpayable\", \"type\": \"function\" }, { \"inputs\": [], \"name\": \"myTotal\", \"outputs\": [ { \"internalType\": \"uint256\", \"name\": \"\", \"type\": \"uint256\" } ], \"stateMutability\": \"view\", \"type\": \"function\" } ]";
// address of contract
public string contractAddress = "0x741C3F3146304Aaf5200317cbEc0265aB728FE07";
string method = "addTotal";
string amount = "1";
var contract = new Contract(contractAbi, contractAddress);
// values should be parsed as integers here
var calldata = contract.Calldata(method, new object[]
{
int.Parse(amount)
});
// send transaction
string response = await Web3Wallet.SendTransaction(chainId, contractAddress, "0", calldata, "", "");
// display response in game
print("Please check the contract variable again in a few seconds once the chain has processed the request!");
}
}
Writing An Array To A Solidity Contract (Web3Wallet Builds)
Writes to an array of addresses stored in a smart contract.
using UnityEngine;
using Web3Unity.Scripts.Library.Ethers.Contracts;
using Web3Unity.Scripts.Library.Web3Wallet;
public class Web3WalletSendArray : MonoBehaviour
{
public async void SendArrayObject()
{
// https://chainlist.org/
var chainId = "5"; // goerli
// contract to interact with
var contractAddress = "0x5244d0453A727EDa96299384370359f4A2B5b20a";
// value in wei
var value = "0";
// abi in json format
var abi =
"[{\"inputs\":[{\"internalType\":\"address[]\",\"name\":\"_addresses\",\"type\":\"address[]\"}],\"name\":\"setStore\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"bought\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getStore\",\"outputs\":[{\"internalType\":\"address[]\",\"name\":\"\",\"type\":\"address[]\"}],\"stateMutability\":\"view\",\"type\":\"function\"}]";
// smart contract method to call
var method = "setStore";
string[] stringArray =
{"0xFb3aECf08940785D4fB3Ad87cDC6e1Ceb20e9aac", "0x92d4040e4f3591e60644aaa483821d1bd87001e3"};
var contract = new Contract(abi, contractAddress);
// gas limit OPTIONAL
var gasLimit = "";
// gas price OPTIONAL
var gasPrice = "";
Debug.Log("Contract: " + contract);
var calldata = contract.Calldata(method, new object[]
{
stringArray
});
Debug.Log("Contract Data: " + calldata);
// send transaction
var response = await Web3Wallet.SendTransaction(chainId, contractAddress, value, calldata, gasLimit, gasPrice);
print(response);
}
}