add tokens/escrow/steel #266

Co-authored-by: Ayush <ayush-15@live.com>

tokens/escrow/steel/Cargo.toml

@@ -0,0 +1,22 @@
+[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]
+escrow-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"

tokens/escrow/steel/README.md

@@ -0,0 +1,40 @@
+# Escrow
+
+**Escrow** is a ...
+        
+## API
+- [`Consts`](api/src/consts.rs) – Program constants.
+- [`Instruction`](api/src/instruction.rs) – Declared instructions.
+
+## Instructions
+- [`MakeOffer`](program/src/make_offer.rs) – Make an offer ...
+- [`TakerOffer`](program/src/take_offer.rs) – Take an offer ...
+
+## State
+- [`Offer`](api/src/state/offer.rs) – Offer state ...
+
+## How to?
+
+Compile your program:
+
+```sh
+pnpm build
+```
+
+Run tests:
+
+```sh
+pnpm test
+```
+
+Run build and test
+
+```sh
+pnpm build-and-test
+```
+
+Deploy your program:
+
+```sh
+pnpm deploy
+```

tokens/escrow/steel/api/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "escrow-api"
+description = "API for interacting with the Escrow 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

tokens/escrow/steel/api/src/consts.rs

@@ -0,0 +1,8 @@
+use solana_program::pubkey;
+use steel::Pubkey;
+
+/// Seed of the offer account PDA.
+pub const OFFER_SEED: &[u8] = b"offer";
+
+pub const ASSOCIATED_TOKEN_PROGRAM_ID: Pubkey =
+    pubkey!("ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL");

tokens/escrow/steel/api/src/instruction.rs

@@ -0,0 +1,23 @@
+use steel::*;
+
+#[repr(u8)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, TryFromPrimitive)]
+pub enum EscrowInstruction {
+    MakeOffer = 0,
+    TakerOffer = 1,
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct MakeOffer {
+    pub id: [u8; 8],
+    pub token_a_offered_amount: [u8; 8],
+    pub token_b_wanted_amount: [u8; 8],
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Pod, Zeroable)]
+pub struct TakerOffer {}
+
+instruction!(EscrowInstruction, MakeOffer);
+instruction!(EscrowInstruction, TakerOffer);

tokens/escrow/steel/api/src/lib.rs

@@ -0,0 +1,16 @@
+pub mod consts;
+pub mod instruction;
+pub mod sdk;
+pub mod state;
+
+pub mod prelude {
+    pub use crate::consts::*;
+    pub use crate::instruction::*;
+    pub use crate::sdk::*;
+    pub use crate::state::*;
+}
+
+use steel::*;
+
+// TODO Set program id
+declare_id!("z7msBPQHDJjTvdQRoEcKyENgXDhSRYeHieN1ZMTqo35");

tokens/escrow/steel/api/src/sdk.rs

@@ -0,0 +1,86 @@
+use steel::*;
+
+use crate::prelude::*;
+
+pub fn make_offer(
+    maker: Pubkey,
+    mint_a: Pubkey,
+    mint_b: Pubkey,
+    id: u64,
+    token_a_offered_amount: u64,
+    token_b_wanted_amount: u64,
+) -> Instruction {
+    let (maker_token_account_a, _) = Pubkey::find_program_address(
+        &[maker.as_ref(), spl_token::ID.as_ref(), mint_a.as_ref()],
+        &spl_token::ID,
+    );
+
+    let offer = offer_pda(maker, id).0;
+    let (vault, _) = Pubkey::find_program_address(
+        &[offer.as_ref(), spl_token::ID.as_ref(), mint_a.as_ref()],
+        &spl_token::ID,
+    );
+    Instruction {
+        program_id: crate::ID,
+        accounts: vec![
+            AccountMeta::new(maker, true),
+            AccountMeta::new_readonly(mint_a, false),
+            AccountMeta::new_readonly(mint_b, false),
+            AccountMeta::new(maker_token_account_a, false),
+            AccountMeta::new(offer, false),
+            AccountMeta::new(vault, false),
+            AccountMeta::new_readonly(spl_token::ID, false),
+            AccountMeta::new_readonly(system_program::ID, false),
+            AccountMeta::new_readonly(ASSOCIATED_TOKEN_PROGRAM_ID, false),
+        ],
+        data: MakeOffer {
+            id: id.to_le_bytes(),
+            token_a_offered_amount: token_a_offered_amount.to_le_bytes(),
+            token_b_wanted_amount: token_b_wanted_amount.to_le_bytes(),
+        }
+        .to_bytes(),
+    }
+}
+
+pub fn take_offer(
+    taker: Pubkey,
+    maker: Pubkey,
+    mint_a: Pubkey,
+    mint_b: Pubkey,
+    offer: Pubkey,
+) -> Instruction {
+    let (taker_token_account_a, _) = Pubkey::find_program_address(
+        &[taker.as_ref(), spl_token::ID.as_ref(), mint_a.as_ref()],
+        &spl_token::ID,
+    );
+    let (taker_token_account_b, _) = Pubkey::find_program_address(
+        &[taker.as_ref(), spl_token::ID.as_ref(), mint_b.as_ref()],
+        &spl_token::ID,
+    );
+    let (maker_token_account_b, _) = Pubkey::find_program_address(
+        &[maker.as_ref(), spl_token::ID.as_ref(), mint_b.as_ref()],
+        &spl_token::ID,
+    );
+    let (vault, _) = Pubkey::find_program_address(
+        &[offer.as_ref(), spl_token::ID.as_ref(), mint_a.as_ref()],
+        &spl_token::ID,
+    );
+    Instruction {
+        program_id: crate::ID,
+        accounts: vec![
+            AccountMeta::new(taker, true),
+            AccountMeta::new(maker, false),
+            AccountMeta::new_readonly(mint_a, false),
+            AccountMeta::new_readonly(mint_b, false),
+            AccountMeta::new(taker_token_account_a, false),
+            AccountMeta::new(taker_token_account_b, false),
+            AccountMeta::new(maker_token_account_b, false),
+            AccountMeta::new(offer, false),
+            AccountMeta::new(vault, false),
+            AccountMeta::new_readonly(spl_token::ID, false),
+            AccountMeta::new_readonly(system_program::ID, false),
+            AccountMeta::new_readonly(ASSOCIATED_TOKEN_PROGRAM_ID, false),
+        ],
+        data: TakerOffer {}.to_bytes(),
+    }
+}

tokens/escrow/steel/api/src/state/mod.rs

@@ -0,0 +1,11 @@
+mod offer;
+
+pub use offer::*;
+
+use steel::*;
+
+#[repr(u8)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, IntoPrimitive, TryFromPrimitive)]
+pub enum EscrowAccount {
+    Offer = 0,
+}

tokens/escrow/steel/api/src/state/offer.rs

@@ -0,0 +1,26 @@
+use steel::*;
+
+use crate::consts::OFFER_SEED;
+
+use super::EscrowAccount;
+
+/// Fetch PDA of the counter account.
+pub fn offer_pda(maker: Pubkey, id: u64) -> (Pubkey, u8) {
+    Pubkey::find_program_address(
+        &[OFFER_SEED, maker.as_ref(), id.to_le_bytes().as_ref()],
+        &crate::id(),
+    )
+}
+
+#[repr(C)]
+#[derive(Clone, Copy, Debug, PartialEq, Pod, Zeroable)]
+pub struct Offer {
+    pub id: [u8; 8],
+    pub maker: Pubkey,
+    pub token_mint_a: Pubkey,
+    pub token_mint_b: Pubkey,
+    pub token_b_wanted_amount: [u8; 8],
+    pub bump: u8,
+}
+
+account!(EscrowAccount, Offer);

tokens/escrow/steel/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "steel",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "pnpm ts-mocha -p ./tsconfig.json -t 1000000 ./tests/*.test.ts",
+    "build-and-test": "cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./tests/fixtures && pnpm test",
+    "build": "cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./program/target/so",
+    "deploy": "solana program deploy ./program/target/so/account_data_program.so"
+  },
+  "keywords": [],
+  "author": "Leo Pham <hongthaipro@gmail.com>",
+  "license": "ISC",
+  "dependencies": {
+    "@solana/spl-token": "^0.4.9",
+    "@solana/web3.js": "^1.95.4",
+    "bs58": "^6.0.0"
+  },
+  "devDependencies": {
+    "@types/chai": "^4.3.7",
+    "@types/mocha": "^10.0.9",
+    "@types/node": "^22.7.9",
+    "borsh": "^2.0.0",
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+    "solana-bankrun": "^0.4.0",
+    "ts-mocha": "^10.0.0",
+    "typescript": "^5.6.3"
+  }
+}

tokens/escrow/steel/pnpm-lock.yaml

@@ -0,0 +1,1463 @@
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+
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+      - encoding
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+      - utf-8-validate
+
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+      fast-stable-stringify: 1.0.0
+      jayson: 4.1.2(bufferutil@4.0.8)(utf-8-validate@5.0.10)
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+  p-locate@5.0.0:
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+
+  path-exists@4.0.0: {}
+
+  pathval@1.1.1: {}
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+  picomatch@2.3.1: {}
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+  regenerator-runtime@0.14.1: {}
+
+  require-directory@2.1.1: {}
+
+  rpc-websockets@9.0.4:
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+      '@types/uuid': 8.3.4
+      '@types/ws': 8.5.12
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+      uuid: 8.3.2
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+  safe-buffer@5.2.1: {}
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+
+  solana-bankrun-darwin-arm64@0.4.0:
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+
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+
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+    optional: true
+
+  solana-bankrun-linux-x64-musl@0.4.0:
+    optional: true
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+    optionalDependencies:
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+      solana-bankrun-linux-x64-gnu: 0.4.0
+      solana-bankrun-linux-x64-musl: 0.4.0
+    transitivePeerDependencies:
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+      - encoding
+      - utf-8-validate
+
+  source-map-support@0.5.21:
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+      source-map: 0.6.1
+
+  source-map@0.6.1: {}
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+  string-width@4.2.3:
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+      is-fullwidth-code-point: 3.0.0
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+  strip-bom@3.0.0:
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+
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+
+  superstruct@2.0.2: {}
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+  undici-types@6.19.8: {}
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+  utf-8-validate@5.0.10:
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+    optional: true
+
+  uuid@8.3.2: {}
+
+  webidl-conversions@3.0.1: {}
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+  whatwg-url@5.0.0:
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+      webidl-conversions: 3.0.1
+
+  workerpool@6.5.1: {}
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+  wrap-ansi@7.0.0:
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+
+  wrappy@1.0.2: {}
+
+  ws@7.5.10(bufferutil@4.0.8)(utf-8-validate@5.0.10):
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+  y18n@5.0.8: {}
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+  yargs-parser@20.2.9: {}
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+  yargs-unparser@2.0.0:
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+      decamelize: 4.0.0
+      flat: 5.0.2
+      is-plain-obj: 2.1.0
+
+  yargs@16.2.0:
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+
+  yn@2.0.0: {}
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+  yocto-queue@0.1.0: {}

tokens/escrow/steel/program/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "escrow-program"
+description = ""
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+homepage.workspace = true
+documentation.workspace = true
+repository.workspace = true
+readme.workspace = true
+keywords.workspace = true
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[dependencies]
+escrow-api.workspace = true
+solana-program.workspace = true
+steel.workspace = true
+spl-token.workspace = true
+
+[dev-dependencies]
+base64 = "0.21"
+rand = "0.8.5"
+solana-program-test = "1.18"
+solana-sdk = "1.18"
+tokio = { version = "1.35", features = ["full"] }

tokens/escrow/steel/program/src/lib.rs

@@ -0,0 +1,25 @@
+mod make_offer;
+mod take_offer;
+
+use make_offer::*;
+use take_offer::*;
+
+use escrow_api::prelude::*;
+use steel::*;
+
+pub fn process_instruction(
+    program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    data: &[u8],
+) -> ProgramResult {
+    let (ix, data) = parse_instruction(&escrow_api::ID, program_id, data)?;
+
+    match ix {
+        EscrowInstruction::MakeOffer => process_make_offer(accounts, data)?,
+        EscrowInstruction::TakerOffer => process_take_offer(accounts, data)?,
+    }
+
+    Ok(())
+}
+
+entrypoint!(process_instruction);

tokens/escrow/steel/program/src/make_offer.rs

@@ -0,0 +1,80 @@
+use escrow_api::prelude::*;
+use steel::*;
+
+pub fn process_make_offer(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult {
+    // Parse args.
+    let args = MakeOffer::try_from_bytes(data)?;
+    let id = u64::from_le_bytes(args.id);
+    let token_a_offered_amount = u64::from_le_bytes(args.token_a_offered_amount);
+
+    // Load accounts.
+    let [maker_info, mint_a_info, mint_b_info, maker_token_account_a_info, offer_info, vault_info, token_program, system_program, associated_token_program] =
+        accounts
+    else {
+        return Err(ProgramError::NotEnoughAccountKeys);
+    };
+
+    maker_info.is_signer()?;
+    token_program.is_program(&spl_token::ID)?;
+    system_program.is_program(&system_program::ID)?;
+    associated_token_program.is_program(&ASSOCIATED_TOKEN_PROGRAM_ID)?;
+
+    offer_info.is_empty()?.is_writable()?.has_seeds(
+        &[
+            OFFER_SEED,
+            maker_info.key.as_ref(),
+            id.to_le_bytes().as_ref(),
+        ],
+        &escrow_api::ID,
+    )?;
+
+    vault_info.is_empty()?.is_writable()?;
+
+    // Create associated token account for vault
+    create_associated_token_account(
+        maker_info,
+        offer_info,
+        vault_info,
+        mint_a_info,
+        system_program,
+        token_program,
+        associated_token_program,
+    )?;
+
+    // Call CPI to create account offer
+    create_account::<Offer>(
+        offer_info,
+        system_program,
+        maker_info,
+        &escrow_api::ID,
+        &[
+            OFFER_SEED,
+            maker_info.key.as_ref(),
+            id.to_le_bytes().as_ref(),
+        ],
+    )?;
+
+    let _mint_a = mint_a_info.as_mint()?;
+    let _mint_b = mint_b_info.as_mint()?;
+
+    // transfer token A to vault
+    transfer(
+        maker_info,
+        maker_token_account_a_info,
+        vault_info,
+        token_program,
+        token_a_offered_amount,
+    )?;
+
+    let offer: &mut Offer = offer_info.as_account_mut::<Offer>(&escrow_api::ID)?;
+
+    // Update state
+    offer.id = args.id;
+    offer.maker = *maker_info.key;
+    offer.token_mint_a = *mint_a_info.key;
+    offer.token_mint_b = *mint_b_info.key;
+    offer.token_b_wanted_amount = args.token_b_wanted_amount;
+    offer.bump = offer_pda(*maker_info.key, id).1;
+
+    Ok(())
+}

tokens/escrow/steel/program/src/take_offer.rs

@@ -0,0 +1,110 @@
+use escrow_api::prelude::*;
+use steel::*;
+
+pub fn process_take_offer(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {
+    // Load accounts.
+    let [taker_info, maker_info, mint_a_info, mint_b_info, taker_token_account_a_info, taker_token_account_b_info, maker_token_account_b_info, offer_info, vault_info, token_program, system_program, associated_token_program] =
+        accounts
+    else {
+        return Err(ProgramError::NotEnoughAccountKeys);
+    };
+
+    taker_info.is_signer()?;
+    token_program.is_program(&spl_token::ID)?;
+    system_program.is_program(&system_program::ID)?;
+    associated_token_program.is_program(&ASSOCIATED_TOKEN_PROGRAM_ID)?;
+
+    let vaul = vault_info.as_associated_token_account(offer_info.key, mint_a_info.key)?;
+
+    // validate mint
+    let _mint_a = mint_a_info.as_mint()?;
+    let _mint_b = mint_b_info.as_mint()?;
+
+    if taker_token_account_a_info.data_is_empty() {
+        create_associated_token_account(
+            taker_info,
+            taker_info,
+            taker_token_account_a_info,
+            mint_a_info,
+            system_program,
+            token_program,
+            associated_token_program,
+        )?;
+    }
+
+    let _taker_token_account_b = taker_token_account_b_info
+        .is_writable()?
+        .as_associated_token_account(taker_info.key, mint_b_info.key)?;
+
+    if maker_token_account_b_info.data_is_empty() {
+        create_associated_token_account(
+            taker_info,
+            maker_info,
+            maker_token_account_b_info,
+            mint_b_info,
+            system_program,
+            token_program,
+            associated_token_program,
+        )?;
+    }
+
+    offer_info.is_writable()?;
+
+    let offer: &mut Offer = offer_info.as_account_mut::<Offer>(&escrow_api::ID)?;
+    offer_info.has_seeds(
+        &[OFFER_SEED, offer.maker.as_ref(), offer.id.as_ref()],
+        &escrow_api::ID,
+    )?;
+
+    // transfer wanted token from taker to maker
+    let token_b_wanted_amount = u64::from_le_bytes(offer.token_b_wanted_amount);
+    transfer(
+        taker_info,
+        taker_token_account_b_info,
+        maker_token_account_b_info,
+        token_program,
+        token_b_wanted_amount,
+    )?;
+
+    // // widthdraw token A from vault
+    transfer_signed_with_bump(
+        offer_info,
+        vault_info,
+        taker_token_account_a_info,
+        token_program,
+        vaul.amount,
+        &[OFFER_SEED, offer.maker.as_ref(), offer.id.as_ref()],
+        offer.bump,
+    )?;
+
+    let seeds = &[
+        OFFER_SEED,
+        offer.maker.as_ref(),
+        offer.id.as_ref(),
+        &[offer.bump],
+    ];
+    let signer_seeds = &[&seeds[..]];
+
+    // close vault account
+    solana_program::program::invoke_signed(
+        &spl_token::instruction::close_account(
+            &spl_token::ID,
+            vault_info.key,
+            taker_info.key,
+            offer_info.key,
+            &[&offer_info.key],
+        )?,
+        &[
+            token_program.clone(),
+            vault_info.clone(),
+            taker_info.clone(),
+            offer_info.clone(),
+        ],
+        signer_seeds,
+    )?;
+
+    // close offer account
+    offer_info.close(maker_info)?;
+
+    Ok(())
+}

tokens/escrow/steel/tests/bankrun.test.ts

@@ -0,0 +1,184 @@
+import { PublicKey, Keypair, SystemProgram, Transaction, TransactionInstruction, LAMPORTS_PER_SOL } from '@solana/web3.js';
+import { ProgramTestContext, BanksClient, start } from 'solana-bankrun';
+import { createAMint, deserializeOfferAccount, encodeBigint, getMakeOfferInstructionData, getTakeOfferInstructionData, mintTo } from './utils';
+import { AccountLayout, ASSOCIATED_TOKEN_PROGRAM_ID, getAssociatedTokenAddressSync, TOKEN_PROGRAM_ID } from '@solana/spl-token';
+import { assert } from 'chai';
+
+const PROGRAM_ID = new PublicKey('z7msBPQHDJjTvdQRoEcKyENgXDhSRYeHieN1ZMTqo35');
+
+describe('Escrow Program', () => {
+  let context: ProgramTestContext;
+  let client: BanksClient;
+  let payer: Keypair;
+  let maker = Keypair.generate();
+  let taker = Keypair.generate();
+
+  const mint_a = Keypair.generate();
+  const mint_b = Keypair.generate();
+
+  let makerAccountA: PublicKey;
+  let makerAccountB: PublicKey;
+  let takerAccountA: PublicKey;
+  let takerAccountB: PublicKey;
+  const id = BigInt(1);
+  const token_a_offered_amount = BigInt(2 * 10 ** 9);
+  const token_b_wanted_amount = BigInt(5 * 10 ** 9);
+  const [offer, offerBump] = PublicKey.findProgramAddressSync(
+    [Buffer.from('offer'), maker.publicKey.toBuffer(), Buffer.from(encodeBigint(id))],
+    PROGRAM_ID,
+  );
+  const vault = getAssociatedTokenAddressSync(mint_a.publicKey, offer, true);
+
+  before(async () => {
+    context = await start([{ name: 'escrow_program', programId: PROGRAM_ID }], []);
+    client = context.banksClient;
+    payer = context.payer;
+
+    {
+      const tx = new Transaction();
+      tx.add(
+        SystemProgram.transfer({
+          fromPubkey: payer.publicKey,
+          toPubkey: maker.publicKey,
+          lamports: LAMPORTS_PER_SOL,
+        }),
+        SystemProgram.transfer({
+          fromPubkey: payer.publicKey,
+          toPubkey: taker.publicKey,
+          lamports: LAMPORTS_PER_SOL,
+        }),
+      );
+      tx.recentBlockhash = context.lastBlockhash;
+      tx.sign(payer);
+
+      await client.processTransaction(tx);
+    }
+
+    await createAMint(context, payer, mint_a);
+    await createAMint(context, payer, mint_b);
+
+    makerAccountA = getAssociatedTokenAddressSync(mint_a.publicKey, maker.publicKey, false);
+
+    makerAccountB = getAssociatedTokenAddressSync(mint_b.publicKey, maker.publicKey, false);
+
+    takerAccountA = getAssociatedTokenAddressSync(mint_a.publicKey, taker.publicKey, false);
+
+    takerAccountB = getAssociatedTokenAddressSync(mint_b.publicKey, taker.publicKey, false);
+
+    await mintTo(context, payer, maker.publicKey, mint_a.publicKey);
+    // await mintTo(context, payer, maker.publicKey, mint_b.publicKey);
+    // await mintTo(context, payer, taker.publicKey, mint_a.publicKey);
+    await mintTo(context, payer, taker.publicKey, mint_b.publicKey);
+  });
+
+  it('Should make an offer successfully', async () => {
+    const tx = new Transaction();
+    tx.add(
+      new TransactionInstruction({
+        programId: PROGRAM_ID,
+        keys: [
+          { pubkey: maker.publicKey, isSigner: true, isWritable: true },
+          { pubkey: mint_a.publicKey, isSigner: false, isWritable: false },
+          { pubkey: mint_b.publicKey, isSigner: false, isWritable: false },
+          { pubkey: makerAccountA, isSigner: false, isWritable: true },
+          { pubkey: offer, isSigner: false, isWritable: true },
+          { pubkey: vault, isSigner: false, isWritable: true },
+          {
+            pubkey: TOKEN_PROGRAM_ID,
+            isSigner: false,
+            isWritable: false,
+          },
+          {
+            pubkey: SystemProgram.programId,
+            isSigner: false,
+            isWritable: false,
+          },
+          {
+            pubkey: ASSOCIATED_TOKEN_PROGRAM_ID,
+            isSigner: false,
+            isWritable: false,
+          },
+        ],
+        data: getMakeOfferInstructionData(id, token_a_offered_amount, token_b_wanted_amount),
+      }),
+    );
+    tx.recentBlockhash = context.lastBlockhash;
+    tx.sign(maker);
+
+    // process the transaction
+    await client.processTransaction(tx);
+
+    const offerAccount = await client.getAccount(offer);
+    assert.isNotNull(offerAccount);
+    assert.equal(offerAccount?.owner.toBase58(), PROGRAM_ID.toBase58());
+    const offerAccountData = deserializeOfferAccount(offerAccount.data);
+    assert.equal(offerAccountData.id, Number(id));
+    assert.equal(offerAccountData.maker.toBase58(), maker.publicKey.toBase58());
+    assert.equal(offerAccountData.token_mint_a.toBase58(), mint_a.publicKey.toBase58());
+    assert.equal(offerAccountData.token_mint_b.toBase58(), mint_b.publicKey.toBase58());
+    assert.equal(offerAccountData.token_b_wanted_amount, Number(token_b_wanted_amount));
+    assert.equal(offerAccountData.bump, offerBump);
+
+    const rawVaultAccount = await client.getAccount(vault);
+    assert.isNotNull(rawVaultAccount);
+    const decodedVaultAccount = AccountLayout.decode(rawVaultAccount?.data);
+    assert.equal(decodedVaultAccount.amount, token_a_offered_amount);
+  });
+
+  it('Should take an offer successfully', async () => {
+    const tx = new Transaction();
+    tx.add(
+      new TransactionInstruction({
+        programId: PROGRAM_ID,
+        keys: [
+          { pubkey: taker.publicKey, isSigner: true, isWritable: true },
+          { pubkey: maker.publicKey, isSigner: false, isWritable: true },
+          { pubkey: mint_a.publicKey, isSigner: false, isWritable: false },
+          { pubkey: mint_b.publicKey, isSigner: false, isWritable: false },
+          { pubkey: takerAccountA, isSigner: false, isWritable: true },
+          { pubkey: takerAccountB, isSigner: false, isWritable: true },
+          { pubkey: makerAccountB, isSigner: false, isWritable: true },
+          { pubkey: offer, isSigner: false, isWritable: true },
+          { pubkey: vault, isSigner: false, isWritable: true },
+          {
+            pubkey: TOKEN_PROGRAM_ID,
+            isSigner: false,
+            isWritable: false,
+          },
+          {
+            pubkey: SystemProgram.programId,
+            isSigner: false,
+            isWritable: false,
+          },
+          {
+            pubkey: ASSOCIATED_TOKEN_PROGRAM_ID,
+            isSigner: false,
+            isWritable: false,
+          },
+        ],
+        data: getTakeOfferInstructionData(),
+      }),
+    );
+    tx.recentBlockhash = context.lastBlockhash;
+    tx.sign(taker);
+
+    // process the transaction
+    await client.processTransaction(tx);
+
+    const rawMakerAccountB = await client.getAccount(makerAccountB);
+    assert.isNotNull(rawMakerAccountB);
+    const decodedMakerAccountB = AccountLayout.decode(rawMakerAccountB?.data);
+    assert.equal(decodedMakerAccountB.amount, token_b_wanted_amount);
+
+    const rawTakerAccountA = await client.getAccount(takerAccountA);
+    assert.isNotNull(rawTakerAccountA);
+    const decodedTakerAccountA = AccountLayout.decode(rawTakerAccountA?.data);
+    assert.equal(decodedTakerAccountA.amount, token_a_offered_amount);
+
+    const offerAccount = await client.getAccount(offer);
+    assert.isNull(offerAccount);
+
+    const vaultAccount = await client.getAccount(vault);
+    assert.isNull(vaultAccount);
+  });
+});

tokens/escrow/steel/tests/utils.ts

@@ -0,0 +1,116 @@
+import {
+  MINT_SIZE,
+  TOKEN_PROGRAM_ID,
+  createInitializeMint2Instruction,
+  getAssociatedTokenAddressSync,
+  createAssociatedTokenAccountInstruction,
+  createMintToInstruction,
+} from '@solana/spl-token';
+import { Keypair, Transaction, SystemProgram, PublicKey, LAMPORTS_PER_SOL } from '@solana/web3.js';
+import { ProgramTestContext } from 'solana-bankrun';
+import * as borsh from 'borsh';
+
+export const instructionDiscriminators = {
+  MakeOffer: Buffer.from([0]),
+  TakeOffer: Buffer.from([1]),
+};
+
+export const getMakeOfferInstructionData = (id: bigint, token_a_offered_amount: bigint, token_b_wanted_amount: bigint) => {
+  return Buffer.concat([
+    instructionDiscriminators.MakeOffer,
+    encodeBigint(id),
+    encodeBigint(token_a_offered_amount),
+    encodeBigint(token_b_wanted_amount),
+  ]);
+};
+
+export const getTakeOfferInstructionData = () => {
+  return Buffer.concat([instructionDiscriminators.TakeOffer]);
+};
+
+export const createAMint = async (context: ProgramTestContext, payer: Keypair, mint: Keypair) => {
+  const tx = new Transaction();
+  tx.add(
+    SystemProgram.createAccount({
+      fromPubkey: payer.publicKey,
+      newAccountPubkey: mint.publicKey,
+      // the `space` required for a token mint is accessible in the `@solana/spl-token` sdk
+      space: MINT_SIZE,
+      // store enough lamports needed for our `space` to be rent exempt
+      lamports: Number((await context.banksClient.getRent()).minimumBalance(BigInt(MINT_SIZE))),
+      // tokens are owned by the "token program"
+      programId: TOKEN_PROGRAM_ID,
+    }),
+    createInitializeMint2Instruction(mint.publicKey, 9, payer.publicKey, payer.publicKey),
+  );
+  tx.recentBlockhash = context.lastBlockhash;
+  tx.sign(payer, mint);
+
+  // process the transaction
+  await context.banksClient.processTransaction(tx);
+};
+
+export const mintTo = async (context: ProgramTestContext, payer: Keypair, owner: PublicKey, mint: PublicKey) => {
+  const tokenAccount = getAssociatedTokenAddressSync(mint, owner, false);
+  const tx = new Transaction();
+  tx.add(
+    createAssociatedTokenAccountInstruction(payer.publicKey, tokenAccount, owner, mint),
+    createMintToInstruction(mint, tokenAccount, payer.publicKey, 1_000 * LAMPORTS_PER_SOL),
+  );
+  tx.recentBlockhash = context.lastBlockhash;
+  tx.sign(payer);
+
+  // process the transaction
+  await context.banksClient.processTransaction(tx);
+  return tokenAccount;
+};
+
+export const encodeBigint = (value: bigint) => {
+  const buffer = Buffer.alloc(8);
+  buffer.writeBigUInt64LE(value);
+  return Uint8Array.from(buffer);
+};
+
+export type OfferAccount = {
+  id: number;
+  maker: PublicKey;
+  token_mint_a: PublicKey;
+  token_mint_b: PublicKey;
+  token_b_wanted_amount: number;
+  bump: number;
+};
+
+// Define DataAccountRaw type for deserialization
+export type OfferAccountRaw = {
+  id: number;
+  maker: Uint8Array;
+  token_mint_a: Uint8Array;
+  token_mint_b: Uint8Array;
+  token_b_wanted_amount: number;
+  bump: number;
+};
+
+// Define the schema for the account data
+export const offerAccountSchema: borsh.Schema = {
+  struct: {
+    discriminator: 'u64',
+    id: 'u64',
+    maker: { array: { type: 'u8', len: 32 } },
+    token_mint_a: { array: { type: 'u8', len: 32 } },
+    token_mint_b: { array: { type: 'u8', len: 32 } },
+    token_b_wanted_amount: 'u64',
+    bump: 'u8',
+  },
+};
+
+export const deserializeOfferAccount = (data: Uint8Array): OfferAccount => {
+  const account = borsh.deserialize(offerAccountSchema, data) as OfferAccountRaw;
+  return {
+    id: account.id,
+    maker: new PublicKey(account.maker),
+    token_mint_a: new PublicKey(account.token_mint_a),
+    token_mint_b: new PublicKey(account.token_mint_b),
+    token_b_wanted_amount: account.token_b_wanted_amount,
+    bump: account.bump,
+  };
+};

tokens/escrow/steel/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "types": ["mocha", "chai", "node"],
+    "typeRoots": ["./node_modules/@types"],
+    "lib": ["es2015"],
+    "module": "commonjs",
+    "target": "es6",
+    "esModuleInterop": true
+  }
+}