add tokens/token-swap/steel (#267)

tokens/token-swap/steel/Cargo.toml

@@ -0,0 +1,23 @@
+[workspace]
+resolver = "2"
+members = ["api", "program"]
+
+[workspace.package]
+version = "0.1.0"
+edition = "2021"
+license = "Apache-2.0"
+homepage = ""
+documentation = ""
+repository = ""
+readme = "./README.md"
+keywords = ["solana"]
+
+[workspace.dependencies]
+token-swap-api = { path = "./api", version = "0.1.0" }
+bytemuck = "1.14"
+num_enum = "0.7"
+solana-program = "1.18"
+steel = { version = "2.0", features = ["spl"] }
+thiserror = "1.0"
+spl-token = "^4"
+spl-math = { version = "0.3.0", features = ["no-entrypoint"] }

tokens/token-swap/steel/README.md

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+# Token swap example amm in Steel
+
+**TokenSwap** - Your Gateway to Effortless Trading! Welcome to the world of Automated Market Makers (AMM), where seamless trading is made possible with the power of automation. The primary goal of AMMs is to act as automatic buyers and sellers, readily available whenever users wish to trade their assets.
+
+## API
+- [`Consts`](api/src/consts.rs) – Program constants.
+- [`Error`](api/src/error.rs) – Custom program errors.
+- [`Instruction`](api/src/instruction.rs) – Declared instructions.
+
+## Instructions
+- [`CreateAmm`](program/src/create_amm.rs) – Create amm ...
+- [`CreatePool`](program/src/create_pool.rs) – Create liquidity pool
+- [`DepositLiquidity`](program/src/deposit_liquidity.rs) – Desposit liquidity to pool
+- [`WithdrawLiquidity`](program/src/withdraw_liquidity.rs) – Withdraw liquidity from pool
+- [`Swap`](program/src/swap.rs) – Swap exact token amount
+
+## State
+- [`Amm`](api/src/state/amm.rs) – Amm state
+- [`Pool`](api/src/state/pool.rs) – Pool state
+
+## How to run
+
+Compile your program:
+
+```sh
+pnpm build
+```
+
+Run unit and integration tests:
+
+```sh
+pnpm test
+```
+
+Run build and test
+
+```sh
+pnpm build-and-test
+```
+
+Deploy your program:
+
+```sh
+pnpm deploy
+```

tokens/token-swap/steel/api/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "token-swap-api"
+description = "API for interacting with the TokenSwap program"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+homepage.workspace = true
+documentation.workspace = true
+repository.workspace = true
+readme.workspace = true
+keywords.workspace = true
+
+[dependencies]
+bytemuck.workspace = true
+num_enum.workspace = true
+solana-program.workspace = true
+steel.workspace = true
+thiserror.workspace = true
+spl-token.workspace = true
+spl-math.workspace = true

tokens/token-swap/steel/api/src/consts.rs

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+use solana_program::pubkey;
+use steel::Pubkey;
+
+pub const MINIMUM_LIQUIDITY: u64 = 100;
+
+pub const AUTHORITY_SEED: &[u8] = b"authority";
+
+pub const LIQUIDITY_SEED: &[u8] = b"liquidity";
+
+pub const ASSOCIATED_TOKEN_PROGRAM_ID: Pubkey =
+    pubkey!("ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL");

tokens/token-swap/steel/api/src/error.rs

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+use steel::*;
+
+#[derive(Debug, Error, Clone, Copy, PartialEq, Eq, IntoPrimitive)]
+#[repr(u32)]
+pub enum TokenSwapError {
+    #[error("Invalid fee, must be between 0 and 10000")]
+    InvalidFee = 0,
+    #[error("Account is not existed")]
+    AccountIsNotExisted = 1,
+    #[error("Invalid account")]
+    InvalidAccount = 2,
+    #[error("Deposit too small")]
+    DepositTooSmall = 3,
+    #[error("Withdrawal too small")]
+    OutputTooSmall,
+    #[error("Invariant violated")]
+    InvariantViolated,
+}
+
+error!(TokenSwapError);

tokens/token-swap/steel/api/src/instruction.rs

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+use steel::*;
+
+#[repr(u8)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, TryFromPrimitive)]
+pub enum TokenSwapInstruction {
+    CreateAmm = 0,
+    CreatePool = 1,
+    DepositLiquidity = 2,
+    WithdrawLiquidity = 3,
+    Swap = 4,
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct CreateAmm {
+    pub id: Pubkey,
+    pub fee: [u8; 2],
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct CreatePool {}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct DepositLiquidity {
+    pub amount_a: [u8; 8],
+    pub amount_b: [u8; 8],
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct WithdrawLiquidity {
+    pub amount: [u8; 8],
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct Swap {
+    pub swap_a: u8,
+    pub input_amount: [u8; 8],
+    pub min_output_amount: [u8; 8],
+}
+
+instruction!(TokenSwapInstruction, CreateAmm);
+instruction!(TokenSwapInstruction, CreatePool);
+instruction!(TokenSwapInstruction, DepositLiquidity);
+instruction!(TokenSwapInstruction, WithdrawLiquidity);
+instruction!(TokenSwapInstruction, Swap);

tokens/token-swap/steel/api/src/lib.rs

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+pub mod consts;
+pub mod error;
+pub mod instruction;
+pub mod sdk;
+pub mod state;
+
+pub mod prelude {
+    pub use crate::consts::*;
+    pub use crate::error::*;
+    pub use crate::instruction::*;
+    pub use crate::sdk::*;
+    pub use crate::state::*; 
+}
+
+use steel::*;
+
+// TODO Set program id
+declare_id!("z7msBPQHDJjTvdQRoEcKyENgXDhSRYeHieN1ZMTqo35");