README.md

HELLO WORLD

Install Requirements

Rust

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Solana cli

# install solana
sh -c "$(curl -sSfL https://release.solana.com/stable/install)"

Anchor

# install anchor
cargo install --git https://github.com/coral-xyz/anchor avm --locked --force

avm install latest
avm use latest

Create Project

anchor init day1 # use day_1 if you have a mac
cd day1

this command will create an default project:

• day_1/src/lib.rs: where the smart contract code locates.
• declare_id!: same concept to the address of solidity, but it's called program_id in solana. The id above is auto generated by framework, you can find it in Anchor.toml under the root directory level.
• day_1: the name of this smarct contract (program)
• Accounts: tx.origin in solidity.

please note: there is no constructorin solana program. the default func of initializeis automatically created by Anchorframework, it is just a common function, same as any arbitrary customized function: pub fn test1()

use anchor_lang::prelude::*;

declare_id!("9qfovSZQtZ3VkgCTiDDWuMCpkPyxt3HAcHh19MiX6pGU");

#[program]
pub mod day_1 {
    use super::*;

    pub fn initialize(_ctx: Context<Initialize>) -> Result<()> {
        // msg!("Greetings from: {:?}", _ctx.program_id);
        msg!("Hello, World!");
        Ok(())
    }
}

#[derive(Accounts)]
pub struct Initialize {}

Config Solana network

to localhost

# shell 1
solana config set --url localhost

# output: 
Config File: /Users/duke/.config/solana/cli/config.yml
RPC URL: http://localhost:8899
WebSocket URL: ws://localhost:8900/ (computed)
Keypair Path: /Users/duke/.config/solana/id.json
Commitment: confirmed

Run validator node

# shell 2
solana-test-validator

this command would create a local folder to test-ledger, it would store all the simulating data, and if you run this command again, be sure to execute at the same level as this folder.

Sync up

# shell 1
anchor keys sync

# output
All program id declarations are synced.

Run Anchor Tests

# shell 1
anchor test --skip-local-validator

this command will build and deploy and execute the test scripts under tests, if you encounter this error below:

can try to execute the following command:

solana-install init 1.18.18

# 1.18.18 should equal to the error message: `solana-program v1.18.181`

check here to see the original topic.

solana is too new, chat-gpt won't help much sometimes, still needs to google online.

Create a new wallet

solana-keygen new -o /Users/duke/.config/solana/id.json

# output:
Wrote new keypair to /Users/duke/.config/solana/id.json
========================================================================
pubkey: HjU6xSZme7ER6Qhk841nczwXijBZ9e1GWLqdPxW6gS9w
========================================================================
Save this seed phrase and your BIP39 passphrase to recover your new keypair:
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========================================================================

Get Wallet address

solana-keygen pubkey ~/.config/solana/id.json

# output:
HjU6xSZme7ER6Qhk841nczwXijBZ9e1GWLqdPxW6gS9w

Sol Airdrop

# solana airdrop 100 <Your Address>
solana airdrop 100 HjU6xSZme7ER6Qhk841nczwXijBZ9e1GWLqdPxW6gS9w

# output:
Requesting airdrop of 100 SOL

Signature: xTrkhn7tad5tMMS9dn3ZA12EtR5LsoLaUYrUjN8gjQZYMkBTs55LVGQS3dLuKbRmMoXoWLWiToY2ReQJwBcMZgc

100 SOL

Test Succeed

Key Takeaways

• Cargo：rust package managem tool
• Rustc：rust complier
• Anchor：solana framework

Links

• day1 original article: https://www.rareskills.io/post/hello-world-solana
• source_code: https://github.com/dukedaily/solana-expert-code/tree/day_1