Social DApp on Solana

This project is intended to be an example of implementing a minimal social network on Solana blockchain. It consists of a smart contract (written in Rust) that contract that can be deployed on localnet (at the moment) and also a typescript library that provides interaction means with the smart contract API.

Prerequisites

• Rust 1.57.0
• node 17.3.0
• npm 8.3.0
• solana 1.9.3
• Linux system (the project was developed on Ubuntu, but it might work on MacOS/Windows as well, with the required bootstrap).

How to deploy the smart contract?

1. We must install solana-cli-tools as (here)[https://docs.solana.com/cli/install-solana-cli-tools#macos--linux], rustup & latest version of Rust (curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh), nvm (curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.1/install.sh | bash) & node (nvm install 17.3.0 && nvm use 17.3.0). npm should be installed by installing node with nvm.

2. Next up, start a validator in a bash terminal: solana-test-validator. You might need to create first a file based wallet: solana-keygen new. The wallet keypair should be present on $HOME/.config/solana/id.json.

3. Run in another terminal solana logs.

4. Clone this repo, enter it and run npm install.

5. Run npm run build:program-rust.

6. Run npm run deploy

How to interact with the smart contract?

1. First, we need the addresses of some friends. Since is hard to find friends nowdays, we're going to make some fake ones: Alice and Bob. We generate keypairs for both of them:

   a. mkdir users && solana-keygen new --outfile users/alice-keypair.json.

   b. solana-keygen new --outfile users/bob-keypair.json.

   c. solana airdrop 1 <alice_pubkey> && solana airdrop 1 <bob_pubkey>.

2. Once this is done, we proceed to adding some friends to our current empty friends list:

   a. solana-keygen pubkey users/alice-keypair.json && solana-keygen pubkey users/bob-keypair.json.

   b. npm run start -- --add=<alice-pubkey>.

   c. npm run start -- --add=<bob-pubkey>.

3. Let's see who's online: npm run start -- --friends.

4. If all friends are offline, let's set the status of one of them to online: npm run start -- --payer-keypair-path=users/alice-keypair.json --online=true.

5. Let's see again who's online: npm run start -- --friends.

6. Let's set Alice status as offline: npm run start -- --payer-keypair-path=users/alice-keypair.json --online=false.

7. Let's see again who's online: npm run start -- --friends.

8. Let's set Bob status as online: npm run start -- --payer-keypair-path=users/bob-keypair.json --online=true.

9. Let's see again who's online: npm run start -- --friends.

10. Let's remove Bob from friends list (nothing personal): npm run start -- --remove=<bob-pubkey>.

11. Let's see again who's online: npm run start -- --friends.