example-helloworld | Hello world on Solana | Blockchain library

I am trying to understand the solana/example-helloworld by re-writing the rust lib myself. I have done this and from the package.json file, to generate the .so file, following is what is run:

I'm a beginner Rust/Solana Developer and wanted to ask if someone knows how to send a spl-token from an account when the account receives a SOL?

I read the https://docs.solana.com/ but i could not find anything about SPL transfers.

Example of Smart Contract: https://github.com/solana-labs/example-helloworld

Example:

Acc1 sends 0.1 SOL to a address and for that Acc1 receives 1 SPL-TOKEN from that address.

Simple explanation: I need a minting website for a token.

I would really appreciate some help, thanks!

I have successfully deploy the BPF and run the client on the Solana hello world example: https://github.com/solana-labs/example-helloworld. The greeted counter in the program also works as expected.

Then, I tried to inspect the transactions using Solana Explorer pointing to localhost. I can see the transactions that I made on the program's transaction history, but after few minutes (1.5-3.5 minutes), if I refresh the page, those transactions is missing.

I've tried to create my own hello program but the transaction is disappeared after few minutes in the history. I also did a simple solana transfer, but it still same.

I did search on google about this problem, but I can't find any good information. I know the state is not a problem (because the solana balance and the data contained in hello world program is correct), so I suspect the problem is from Solana Explorer, but then I tried solana transaction-history on my cli. And same as before, the transaction appeared and disappeared.

So now, I suspect that solana-test-validator remove the transaction history from ledger. But, I found that the test-ledger is growing (last time I check is 10gb).

I'm still not sure why the transaction history is missing and how to fix it, so I can inspect the transactions that I and the program make. It will make my on-chain program development easier. Thanks!

I am trying to run Solana rust hello world example locally (https://github.com/solana-labs/example-helloworld). I went through the readme but the step "Start local Solana cluster" (https://github.com/solana-labs/example-helloworld#start-local-solana-cluster) is not working for me. I am receiving thread 'main' panicked at 'called Result::unwrap() on an Err value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', validator/src/bin/solana-test-validator.rs:294:71 error.

My solana-test-validator version is 1.7.9

This is my config.yml file:

does anyone know why introducing a simple line like "Pubkey::new_unique()" inside https://github.com/solana-labs/example-helloworld/blob/master/src/program-rust/src/lib.rs#L22 will make the program fail?

I am attempting to run the HelloWorld solana program. I have cloned this repo. I have started the project with

It seems, that I cannot exclude the JBoss/ Wildfly Logging Subsystem.

I have an Java EE ear and would like to use slf4j API together with log4J2 Implementation.

My intention was to disable JBoss logging subsystem to let my slf4j log4j2 implementation handle the logging. But I still get duplicate handling of stdout:

12:55:00,820 INFO [stdout] (Thread-316) 12:55:00 INFO

the ear structure is as follows: