Solana

Problem

isBlockhashValid is a useful RPC call for checking if a transaction needs to be resigned with a new blockhash, but it isn't available in web3.js

Proposed Solution

Add support for it on Connection. More information about the call at https://docs.solana.com/developing/clients/jsonrpc-api#isblockhashvalid

currently, for a given program, only the last executed test suite log survives since they are all streamed to the same file

When solang --standard-json is run, the output from the compiler is in the standard json format. However, the input is not.

1. Parse input on stdin as json using the [standard json](https://docs.soliditylang.org/en/v0.8.13/using-the-compiler.html#compiler-input-and-output-json-descri

The implementation is in this fork here:
https://github.com/Auguron/solana-py/blob/8b8516aedb158c5b0a5d5b742043c4e1507452ef/src/memo/memo_program.py#L1

Let's write a test or two and merge the code from the fork 🙏 .

It should be easier for users to create wallets.