add README for account-data example

basics/account-data/README.md

@@ -0,0 +1,22 @@
+# Account Data
+
+:package: We're going to store data in a Solana account. :memo:
+
+Solana accounts are used to store persistent state. This means that the data stays on the blockchain until the account is closed.
+
+In this example, we demonstrate how to:
+1.  **Define a data structure**: We create an `AddressInfo` struct to store a name, house number, street, and city.
+2.  **Calculate required space**: We determine how much memory (bytes) the account needs to store our structure.
+3.  **Initialize the account**: We allocate the space and write the initial data.
+
+### Frameworks covered:
+- **Anchor**: Uses `#[account]` and `#[derive(InitSpace)]` to automate space calculation.
+- **Native**: Manually calculates space and uses `Borsh` for serialization.
+- **Pinocchio**: A lightweight approach to account data management.
+
+Each implementation shows how to handle fixed-size data and strings with maximum lengths.
+
+### Links:
+- [Solana Docs - Accounts](https://docs.solana.com/developing/programming-model/accounts)
+- [Anchor Docs - Space Reference](https://www.anchor-lang.com/docs/space)
+- [Borsh Specification](https://borsh.io/)

tokens/token-swap/anchor/programs/token-swap/src/instructions/deposit_liquidity.rs

@@ -38,13 +38,13 @@ pub fn deposit_liquidity(
         (amount_a, amount_b)
     } else {
         let ratio = I64F64::from_num(pool_a.amount)
-            .checked_mul(I64F64::from_num(pool_b.amount))
-            .unwrap();
+            .checked_div(I64F64::from_num(pool_b.amount))
+            .ok_or(TutorialError::DepositTooSmall)?;
         if pool_a.amount > pool_b.amount {
             (
                 I64F64::from_num(amount_b)
                     .checked_mul(ratio)
-                    .unwrap()
+                    .ok_or(TutorialError::DepositTooSmall)?
                     .to_num::<u64>(),
                 amount_b,
             )

tokens/token-swap/anchor/programs/token-swap/src/lib.rs

@@ -6,7 +6,7 @@ mod instructions;
 mod state;
 
 // Set the correct key here
-declare_id!("AsGVFxWqEn8icRBFQApxJe68x3r9zvfSbmiEzYFATGYn");
+declare_id!("14EcVFUfkQUpMFH4DSK3TZZiB8di7XzCJsuVpV12YEa8");
 
 #[program]
 pub mod swap_example {

tokens/token-swap/anchor/tests/deposit-liquidity.ts

@@ -43,9 +43,9 @@ describe("Deposit liquidity", () => {
       .rpc();
   });
 
-  it("Deposit equal amounts", async () => {
+  it("Deposit liquidity", async () => {
     await program.methods
-      .depositLiquidity(values.depositAmountA, values.depositAmountA)
+      .depositLiquidity(values.depositAmountA, values.depositAmountB)
       .accounts({
         pool: values.poolKey,
         poolAuthority: values.poolAuthority,
@@ -62,13 +62,19 @@ describe("Deposit liquidity", () => {
       .signers([values.admin])
       .rpc({ skipPreflight: true });
 
+    // liquidity = sqrt(amount_a * amount_b) - minimumLiquidity
+    const expectedLiquidity =
+      Math.floor(Math.sqrt(values.depositAmountA.toNumber() * values.depositAmountB.toNumber())) -
+      values.minimumLiquidity.toNumber();
+
     const depositTokenAccountLiquditiy = await connection.getTokenAccountBalance(values.liquidityAccount);
-    expect(depositTokenAccountLiquditiy.value.amount).to.equal(
-      values.depositAmountA.sub(values.minimumLiquidity).toString(),
-    );
+    expect(depositTokenAccountLiquditiy.value.amount).to.equal(expectedLiquidity.toString());
+
     const depositTokenAccountA = await connection.getTokenAccountBalance(values.holderAccountA);
     expect(depositTokenAccountA.value.amount).to.equal(values.defaultSupply.sub(values.depositAmountA).toString());
+
     const depositTokenAccountB = await connection.getTokenAccountBalance(values.holderAccountB);
-    expect(depositTokenAccountB.value.amount).to.equal(values.defaultSupply.sub(values.depositAmountA).toString());
+    // Token B deducted = depositAmountB, not depositAmountA
+    expect(depositTokenAccountB.value.amount).to.equal(values.defaultSupply.sub(values.depositAmountB).toString());
   });
 });