Prerequisites

Ensure near-cli is installed by running:

near --version

If needed, install near-cli:

npm install near-cli -g

Ensure Rust is installed by running:

rustc --version

If needed, install Rust:

curl https://sh.rustup.rs -sSf | sh

Install dependencies

npm install

Building this contract

To make the build process compatible with multiple operating systems, the build process exists as a script in package.json. There are a number of special flags used to compile the smart contract into the wasm file. Run this command to build and place the wasm file in the res directory:

npm run build

Note: Instead of npm, users of yarn may run:

yarn build

Important

If you encounter an error similar to:

note: the wasm32-unknown-unknown target may not be installed

Then run:

rustup target add wasm32-unknown-unknown

Using this contract

Quickest deploy

Build and deploy this smart contract to an development account. This development account will be created automatically and is not intended to be permanent. Please see the "Standard deploy" section for creating a more personalized account to deploy to.

near dev-deploy --wasmFile res/counter.wasm --helperUrl https://near-contract-helper.onrender.com

Behind the scenes, this is creating an account and deploying a contract to it. On the console, notice a message like:

Done deploying to dev-1234567890123

In this instance, the account is dev-1234567890123. A file has been created containing the key to the account, located at neardev/dev-account.

Standard deploy

In this option, the smart contract will get deployed to a specific account created with the NEAR Wallet.

If you do not have a NEAR account, please create one with NEAR Wallet.

Make sure you have credentials saved locally for the account you want to deploy the contract to. To perform this run the following near-cli command:

near login

Deploy the contract:

near deploy --wasmFile res/counter.wasm --accountId YOUR_ACCOUNT_NAME