{"id":50496186,"url":"https://github.com/davidweb3-ctrl/solana-counter","last_synced_at":"2026-06-02T07:03:59.740Z","repository":{"id":323519954,"uuid":"1093590525","full_name":"davidweb3-ctrl/solana-counter","owner":"davidweb3-ctrl","description":"a simple counter 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Solana Counter (Anchor)\n\nAn Anchor-based Solana demo program that initializes and increments a global counter stored at a PDA derived from the seed `\"counter\"`.\n\n### Features\n- `initialize`: Creates the `CounterAccount` PDA and sets `count = 0`.\n- `increment`: Mutates the same PDA and increments `count` by 1.\n\n### Program\n- Location: `programs/solana-counter/src/lib.rs`\n- Program ID: defined in `declare_id!` (auto-synced by `anchor keys sync`)\n\n### Prerequisites\n- Rust + Cargo\n- Solana CLI\n- Node.js (v18+ recommended), Yarn or npm\n- Anchor CLI (tested with 0.32.x)\n\n### Install dependencies\n```bash\nyarn install\n```\n\n### Local validator\nStart or reuse a local validator on 8899:\n```bash\nsolana-test-validator -r --quiet \u0026\nsolana cluster-version --url http://127.0.0.1:8899\n```\n\nIf port 8899 is in use:\n```bash\nlsof -iTCP:8899 -sTCP:LISTEN -n -P\npkill -f solana-test-validator || kill -9 \u003cPID\u003e\n```\n\n### Build\n```bash\nanchor build\n```\n\n### Deploy (localnet)\nUse an already running validator (recommended):\n```bash\nANCHOR_PROVIDER_URL=http://127.0.0.1:8899 ANCHOR_SKIP_LOCAL_VALIDATOR=1 anchor deploy\n```\n\nLet Anchor manage the validator (ensure 8899 free):\n```bash\nanchor deploy\n```\n\n### Tests\nRun the TypeScript tests against your existing local validator:\n```bash\nANCHOR_PROVIDER_URL=http://127.0.0.1:8899 ANCHOR_SKIP_LOCAL_VALIDATOR=1 anchor test\n```\n\n### Check the counter value\nDerive the PDA and read the account in one command:\n```bash\nANCHOR_PROVIDER_URL=http://127.0.0.1:8899 anchor account \\\n  --provider.cluster localnet \\\n  solana_counter.CounterAccount \\\n  $(solana program address --program-id 7yMztafjmApP9WXjq6pdiW98a4D38SvEE8Pbqipnnq8r counter)\n```\nExpected output includes the `count` field.\n\nAlternatively (TypeScript):\n```ts\nimport * as anchor from \"@coral-xyz/anchor\";\nimport { PublicKey } from \"@solana/web3.js\";\n\nconst provider = new anchor.AnchorProvider(\n  new anchor.web3.Connection(\"http://127.0.0.1:8899\"),\n  anchor.Wallet.local(),\n  {}\n);\nanchor.setProvider(provider);\nconst program = anchor.workspace.SolanaCounter;\n\n(async () =\u003e {\n  const [counterPda] = PublicKey.findProgramAddressSync(\n    [Buffer.from(\"counter\")],\n    program.programId\n  );\n  const account = await program.account.counterAccount.fetch(counterPda);\n  console.log(\"count =\", account.count.toNumber());\n})();\n```\n\n### Devnet\nSwitch provider to devnet in `Anchor.toml`:\n```toml\n[provider]\ncluster = \"devnet\"\nwallet = \"~/.config/solana/id.json\"\n```\nCLI config and airdrop:\n```bash\nsolana config set --url https://api.devnet.solana.com\nsolana config set --keypair ~/.config/solana/id.json\nsolana airdrop 2\n```\nDeploy:\n```bash\nanchor build\nanchor deploy\n```\n\n### Notes for Anchor 0.32\n- Access bumps via generated struct fields, e.g. `ctx.bumps.counter` (not `ctx.bumps.get(...)`).\n- `--skip-local-validator` flag is removed; use env var:\n  - `ANCHOR_PROVIDER_URL=http://127.0.0.1:8899`\n  - `ANCHOR_SKIP_LOCAL_VALIDATOR=1`\n\n### Troubleshooting\n- Port 8899 in use: stop existing validator or use `--skip` env var combo above.\n- 502 Bad Gateway from RPC: restart local validator and verify with `solana cluster-version --url http://127.0.0.1:8899`.\n- Recursive tests: avoid `[scripts] test = \"anchor test\"` in `Anchor.toml` or change it to include `ANCHOR_SKIP_LOCAL_VALIDATOR=1`.\n\n### Project structure\n- `programs/solana-counter/src/lib.rs`: On-chain program (initialize, increment).\n- `tests/solana-counter.ts`: Anchor TS tests.\n- `Anchor.toml`: Workspace configuration.\n- `target/types/solana_counter.ts`: Generated IDL types for 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