Tutorial: WTF Solana Web3.js Tutorial Lesson 9: Sending Transactions Updated

In this lesson, we introduce two different methods for sending transactions: `sendAndConfirmTransaction()` and `sendRawTransaction()`, and use two different methods, `confirmTransaction` and `onSignature`, to wait for transaction confirmation.

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GitHub: https://github.com/WTFAcademy/WTF-Solana