Solana Simple Web3

A simple API to interact with the Solana blockchain.

In regard to unit test of Solana programs, ones often have to prepare multiple user roles and tokens beforehand, which can be tedious. Simple-Web3 simplifies your tasks into just a few lines of codes.

Setup

Install with NPM under your project folder.

npm i @solardev/simple-web3

Import the package in your source codes.

import { 
    SimpleUser, u8, u16, u32, u64, findProgramAddress 
} from "@solardev/simple-web3"

Simple PDA Utility

Program Derived Address

We provide a handy version of findProgramAddressSync, users can just pass the string, publicKey or number as seed.

const [pda, bump] = findProgramAddress(
    programId,
    ["seed", roleA.publicKey, u16(1234)]
)

const pda = createProgramAddress(
    programId,
    ["seed", roleA.publicKey, u16(1234), u8(bump)]
)

Simple Solana User

Create users

Every simple-web3 command starts with a SimpleUser instance. You can generate a new one with a random private key, or import from an existing web3.Keypair. Pass in a web3.connection either from the Anchor provider or Solana web3 API.

const roleA = SimpleUser.fromKeypair(connection, keypair)

const roleB = SimpleUser.generate(connection)

Get SOL faucets

Get the basic SOL from testnet for activities gas fees.

Because faucet is limited, this function may fail outside localnet.

await roleA.faucet(5)

Check the SOL balance

Some SOL is airdropped to newly created SimpleUser for paying gas fees. You can check their SOL balance remained.

const balance = await roleA.sol()

Mint tokens

SimpleUser can mint SPL tokens with the alias. The minted tokens are default to 9 digits decimal and have an initial supply big enough for testing. All initial tokens are owned by the minter.

await roleA.mint("USDC").commit()

Transfer tokens

After minting the SPL tokens, minters can transfer any amounts to another SimpleUser.

await roleA.transfer("USDC", 100, roleB).commit()

Check tokens

A SimpleUser can own several tokens. Their mint address, associated token account and balance can be checked by referencing the associated alias.

const { mint, decimals, tokenAccount } = roleB.tokens["USDC"]

const tokenAccount = roleB.token["USDC"].tokenAccount

const { rawAmount, decimals, amount } = await roleB.balance("USDC")

Commands pipeline

You can chain multiple state-modifying commands together, and submit an atomic transaction.

await minter.mint("POPCAT")
    .transfer("POPCAT", 100, roleA)
    .transfer("POPCAT", 500, roleB)
    .commit()

Sign Anchor transactions

Simple-Web3 is the best companion with Anchor to produce tidy Solana client codes. You may just treat SimpleUser as the web3.Keypair and use anywhere.

await program.methods.initCounter()
    .accounts({
        owner: roleA.publicKey,
        counter: counterPDA
    })
    .signers([roleA])
    .rpc()

#AwesomeSolana #Solana #web3 #PDA