Smart Contracts (Wasm)

With NibiJS, developers can utilize the SigningCosmWasmClient within the NibiruTxClient class to interact with a smart contract. This allows them to upload the contract's bytecode, set the sender address, specify the fee, and deploy the contract to the blockchain. Additionally, it simplifies the processes of smart contract instantiation, querying, and execution.

Interacting with Smart Contracts

To interact with smart contracts, you need to connect your wallet to a NibiruTxClient. This provides access to SigningCosmWasmClient via the wasm property. In the example below, we are connecting via Cosmos-Kit (opens new window). For other options, check out this guide.

Connect to a Wallet

First, set up the connection to your wallet. This example is using Cosmos-Kit.

Copy import { NibiruTxClient, Testnet, } from "@nibiruchain/nibijs" import { useChain } from "@cosmos-kit/react"; const chain = Testnet(1); const { getOfflineSigner } = useChain(chain.chainName); const txClient = await NibiruTxClient.connectWithSigner( chain.endptTm, // RPC endpoint getOfflineSigner );

Deploying Smart Contract

To deploy a smart contract, you need to upload the WASM bytecode to the blockchain.

Copy const senderAddress = "your_sender_address"; // Replace with your sender address const wasmCode = fs.readFileSync("path_to_your_wasm_file.wasm"); // Read the WASM file as a Uint8Array const fee = "auto"; // You can specify the fee if needed const deployContract = await txClient.wasmClient.upload( senderAddress, wasmCode, fee );

Instantiating a Smart Contract

To query a smart contract, provide the contract address and the query message.

After deploying the contract, instantiate it by providing the codeId and initialization parameters.

Copy const senderAddress = "your_sender_address"; // Replace with your sender address const codeId = deployContract.codeId; // Use the code ID from the deployment step const instantiateMsg = {}; // Replace with the contract's instantiate message const label = "My Smart Contract"; // A human-readable label for your contract const fee = "auto"; // You can specify the fee if needed const instantiateContract = await txClient.wasmClient.instantiate( senderAddress, codeId, instantiateMsg, label, fee );

Querying a Smart Contract

To query a smart contract, provide the contract address and the query message.

Copy const contractAddress = "your_contract_address"; // Replace with your contract address const queryMsg = {}; // Replace with the query message for your contract const queryContract = await txClient.wasmClient.queryContractSmart( contractAddress, queryMsg );

Executing a Smart Contract

To execute a smart contract, provide the sender address, contract address, and execution message.

Copy const senderAddress = "your_sender_address"; // Replace with your sender address const contractAddress = "your_contract_address"; // Replace with your contract address const executeMsg = {}; // Replace with the execution message for your contract const fee = "auto"; // You can specify the fee if needed const executeContract = await txClient.wasmClient.execute( senderAddress, contractAddress, executeMsg, fee );

Related Pages

• NibiJS Getting Started
• NibiJS Connecting wiht a wallet extension