Playground solana program tracking file events

Why? For fun. The app watches a given directory and reports all file events (e.g. created, written, deleted) to the solana program. Solana program stores only the latest event of a file.

Deploy solana program locally

From https://solana.com/developers/guides/getstarted/local-rust-hello-world

cd solana_program/

Build

cargo build-sbf

Configure Solana CLI

Configure your Solana CLI to use your localhost validator for all your future terminal commands and Solana program deployment:

solana config set --url localhost

After setting a cluster target, any future subcommands will send/receive information from that cluster. To set it to devnet:

solana config set --url https://api.devnet.solana.com

Run test validator

Run a local validator for tests:

solana-test-validator

Get configs

solana config get

Outputs:

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

First setup

solana-keygen new -o ${HOME}/.config/solana/id.json

Money 💸

solana airdrop 500

Deploy

https://docs.solanalabs.com/cli/examples/deploy-a-program

solana program deploy ./target/deploy/file_event_tracker.so

List all programs deployed by an address

solana program show --programs

Outputs:

Program Id                                   | Slot      | Authority                                    | Balance
EqWRXakMW7rJvT4dMUd1uUdNyKbbvEP48kK9NCevfAJ4 | 1768      | E617pwHkquBHUPAqcThYYmw1Wbhcwy1vq8V4vnPpAfMY | 0.4321116 SOL

List all buffers

Program Buffer - a temporary account that stores byte code while a program is being actively deployed or upgraded. Once the process is complete, the data is transferred to the Program Executable Data Account and the buffer account is closed.

solana program show --buffers

Buffer Address                               | Authority                                    | Balance
65imwR88tsyxgwXcfnE27ENpzkbbrKkhUktU5mZJT2Kw | E617pwHkquBHUPAqcThYYmw1Wbhcwy1vq8V4vnPpAfMY | 1.03802136 SOL
7vq2GPfJhEzvxzyHCmWQAxiBvvjmFY8L36HV1MGeTv9W | E617pwHkquBHUPAqcThYYmw1Wbhcwy1vq8V4vnPpAfMY | 1.03802136 SOL
DPVboTdank8b42AFBu74SHbH8uFirWBv4Y9tLDLGPV7V | E617pwHkquBHUPAqcThYYmw1Wbhcwy1vq8V4vnPpAfMY | 1.03802136 SOL

Close program

solana program close <address>

Watch

https://explorer.solana.com/?cluster=custom

solana logs

Common problems

Solana program deploy

Account data too small for instruction

Error: Deploying program failed: RPC response error -32002: Transaction simulation failed: Error processing Instruction 0: account data too small for instruction [3 log messages]

You'll need to extend your program size.

solana program extend FTa31aKNoLQJTW3C2XazWemfnWWbHckaRzaYzLR25Wio 20000 -u l -k ${HOME}/.config/solana/id.json 

FTa31aKN... PROGRAM_ID

20000 ADDITIONAL_BYTES

-u, --url <URL_OR_MONIKER>             URL for Solana's JSON RPC or moniker (or their first letter): [mainnet-beta,
                                           testnet, devnet, localhost]
-k, --keypair <KEYPAIR>                Filepath or URL to a keypair