├── .gitignore
├── package.json
├── README.md
└── Transactions-and-Fees-challenge.js


/.gitignore:
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1 | /node_modules


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/package.json:
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1 | {
2 |   "dependencies": {
3 |     "@solana/web3.js": "^1.87.6"
4 |   }
5 | }
6 | 


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/README.md:
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 1 | # Transactions-and-Fees
 2 | A simple code that calculates the wallet balance of the sender wallet. Then, transfer 50% of the balance to another wallet.
 3 | 
 4 | ## How to use
 5 | - clone the repo
 6 | - On the CLI type `npm i`
 7 | - Hit enter
 8 | - On the CLI type `Transactions-and-Fees-challenge.js`
 9 | - Hit enter
10 | - 
11 | Congrats 🎉 You have successfully transferred SOL tokens.
12 | 


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/Transactions-and-Fees-challenge.js:
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 1 | // Import Solana web3 functinalities
 2 | const {
 3 |     Connection,
 4 |     PublicKey,
 5 |     clusterApiUrl,
 6 |     Keypair,
 7 |     LAMPORTS_PER_SOL,
 8 |     Transaction,
 9 |     SystemProgram,
10 |     sendAndConfirmTransaction
11 | } = require("@solana/web3.js");
12 | const { log } = require("console");
13 | 
14 | const transferSol = async() => {
15 |     const connection = new Connection("http://127.0.0.1:8899", "confirmed");
16 | 
17 |     // Get Keypair from Secret Key
18 |     var from = Keypair.generate();
19 | 
20 |     // Generate another Keypair (account we'll be sending to)
21 |     const to = Keypair.generate();
22 | 
23 |     // Aidrop 2 SOL to Sender wallet
24 |     console.log("Airdopping some SOL to Sender wallet!");
25 |     const fromAirDropSignature = await connection.requestAirdrop(
26 |         new PublicKey(from.publicKey),
27 |         2 * LAMPORTS_PER_SOL
28 |     );
29 | 
30 |     // Latest blockhash (unique identifer of the block) of the cluster
31 |     let latestBlockHash = await connection.getLatestBlockhash();
32 | 
33 |     // Confirm transaction using the last valid block height (refers to its time)
34 |     // to check for transaction expiration
35 |     await connection.confirmTransaction({
36 |         blockhash: latestBlockHash.blockhash,
37 |         lastValidBlockHeight: latestBlockHash.lastValidBlockHeight,
38 |         signature: fromAirDropSignature
39 |     });
40 | 
41 |     console.log("Airdrop completed for the Sender account");
42 |     console.log("\n");
43 | 
44 |     const walletBalanceFrom = await connection.getBalance(from.publicKey);
45 |     console.log("-- from Wallet balance:", `${parseInt(walletBalanceFrom) / LAMPORTS_PER_SOL}`);
46 |     const walletBalanceTo = await connection.getBalance(to.publicKey);
47 |     console.log("-- to Wallet balance:", `${parseInt(walletBalanceTo) / LAMPORTS_PER_SOL}`);
48 |     console.log("\n")
49 | 
50 |     const halfOfwalletBalanceFrom = walletBalanceFrom / 2;
51 | 
52 |     // Send money from "from" wallet and into "to" wallet
53 |     var transaction = new Transaction().add(
54 |         SystemProgram.transfer({
55 |             fromPubkey: from.publicKey,
56 |             toPubkey: to.publicKey,
57 |             lamports: halfOfwalletBalanceFrom
58 |         })
59 |     );
60 | 
61 |     // Sign transaction
62 |     var signature = await sendAndConfirmTransaction(
63 |         connection,
64 |         transaction,
65 |         [from]
66 |     );
67 |     console.log('Signature is', signature);
68 |     console.log("\n");
69 | 
70 |     const walletBalanceFromAfter = await connection.getBalance(from.publicKey);
71 |     console.log("-> from Wallet balance:", `${parseInt(walletBalanceFromAfter) / LAMPORTS_PER_SOL}`);
72 |     const walletBalanceToAfter = await connection.getBalance(to.publicKey);
73 |     console.log("-> to Wallet balance:", `${parseInt(walletBalanceToAfter) / LAMPORTS_PER_SOL}`);
74 | }
75 | 
76 | transferSol();


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