Mint a PSP22 token on Pop

This tutorial will teach you how to mint a PSP22 token on Pop

Introduction

PSP stands for Polkadot Smart Contract Proposal. These are specifications for Polkadot smart contracts. More info can be found here.

In this tutorial, we will use an ink! smart contract that implements the PSP22 fungible token standard for Polkadot.

Get Started

Let's start!

pop new contract

┌   Pop CLI : Generate a contract
│
◇  Select a template type: 
│  PSP 
│
◇  Select the contract:
│  Psp22 
│
◆  Where should your project be created?
│  ./my_psp22_token 
└  

cd my_psp22_token
pop build

Create the PSP22 token

In the next command, we will deploy and create a PSP22 token with the following params:

Name: AWESOME

Symbol: AWE

Decimals: 10

Supply: 10_000_000

The following command will spin up a local blockchain, deploy the PSP22 smart contract to the blockchain, and instantiate it with the above parameters.

pop up --constructor new --args 10000000, 'Some("AWESOME")', 'Some("AWE")', 10

┌   Pop CLI : Deploy a smart contract
│
◇  Gas limit estimate: Weight { ref_time: 742850263, proof_size: 24819 }
│
◇  Contract deployed and instantiated: The Contract Address is "5EmcjhRR4MznE9quijW4vvNZXzhgYNWVE4BiT2M5jTxjcfdt"
│
└  🚀 Deployment complete

Awesome! The contract has been deployed. This means your token has been created!

Let's check by doing a few RPC calls.

Check the token name:

pop call contract --contract 5EmcjhRR4MznE9quijW4vvNZXzhgYNWVE4BiT2M5jTxjcfdt --message PSP22Metadata::token_name

The above call should return "AWESOME" as the token name.

Check the total supply:

pop call contract --contract 5EmcjhRR4MznE9quijW4vvNZXzhgYNWVE4BiT2M5jTxjcfdt --message PSP22::total_supply

The above should return a total supply of 10_000_000

Let's transfer 1_000 AWE tokens from the owner (Alice) to Bob:

pop call contract --contract 5EmcjhRR4MznE9quijW4vvNZXzhgYNWVE4BiT2M5jTxjcfdt --message PSP22::transfer --args 5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty 1000 '[]' --execute

Let's confirm that Bob now has 1_000 AWE tokens:

pop call contract --contract 5EmcjhRR4MznE9quijW4vvNZXzhgYNWVE4BiT2M5jTxjcfdt --message PSP22::balance_of --args 5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty

Congrats! You have successfully used a PSP22 contract to mint a token and call its transfer message.