initial implement

programs/descro/src/constants.rs

@@ -1,4 +1 @@
-use anchor_lang::prelude::*;
-
-#[constant]
-pub const SEED: &str = "anchor";
+// reserved for future constants

programs/descro/src/error.rs

@@ -1,7 +1,15 @@
 use anchor_lang::prelude::*;
 
 #[error_code]
-pub enum ErrorCode {
-    #[msg("Custom error message")]
-    CustomError,
+pub enum EscrowError {
+    #[msg("Invalid state for this instruction")]
+    InvalidState,
+    #[msg("Signer is not authorized")]
+    Unauthorized,
+    #[msg("No resolver configured for this escrow")]
+    NoResolverConfigured,
+    #[msg("Signer is not the configured resolver")]
+    UnauthorizedResolver,
+    #[msg("Escrow has expired")]
+    Expired,
 }

programs/descro/src/instructions.rs

@@ -1,3 +1,13 @@
-pub mod initialize;
+pub mod cancel;
+pub mod complete;
+pub mod create_escrow;
+pub mod deposit;
+pub mod dispute;
+pub mod resolve;
 
-pub use initialize::*;
+pub use cancel::*;
+pub use complete::*;
+pub use create_escrow::*;
+pub use deposit::*;
+pub use dispute::*;
+pub use resolve::*;

programs/descro/src/instructions/cancel.rs

@@ -0,0 +1,25 @@
+use anchor_lang::prelude::*;
+use crate::state::{EscrowAccount, EscrowState};
+use crate::error::EscrowError;
+
+#[derive(Accounts)]
+pub struct Cancel<'info> {
+    #[account(mut)]
+    pub seller: Signer<'info>,
+
+    #[account(
+        mut,
+        seeds = [b"escrow", escrow_account.seller.as_ref(), &escrow_account.escrow_id.to_le_bytes()],
+        bump = escrow_account.bump,
+        constraint = seller.key() == escrow_account.seller @ EscrowError::Unauthorized,
+        constraint = escrow_account.state == EscrowState::AwaitingDeposit @ EscrowError::InvalidState,
+        close = seller,
+    )]
+    pub escrow_account: Account<'info, EscrowAccount>,
+
+    pub system_program: Program<'info, System>,
+}
+
+pub fn handler(_ctx: Context<Cancel>) -> Result<()> {
+    Ok(())
+}

programs/descro/src/instructions/complete.rs

@@ -0,0 +1,59 @@
+use anchor_lang::prelude::*;
+use anchor_lang::solana_program::{program::invoke_signed, system_instruction};
+use crate::state::{EscrowAccount, EscrowState};
+use crate::error::EscrowError;
+
+#[derive(Accounts)]
+pub struct Complete<'info> {
+    pub buyer: Signer<'info>,
+
+    /// CHECK: Seller receives vault funds and escrow rent
+    #[account(
+        mut,
+        constraint = seller.key() == escrow_account.seller @ EscrowError::Unauthorized,
+    )]
+    pub seller: UncheckedAccount<'info>,
+
+    #[account(
+        mut,
+        seeds = [b"escrow", escrow_account.seller.as_ref(), &escrow_account.escrow_id.to_le_bytes()],
+        bump = escrow_account.bump,
+        constraint = buyer.key() == escrow_account.buyer @ EscrowError::Unauthorized,
+        constraint = escrow_account.state == EscrowState::Active @ EscrowError::InvalidState,
+        close = seller,
+    )]
+    pub escrow_account: Account<'info, EscrowAccount>,
+
+    /// CHECK: PDA vault from which SOL is released
+    #[account(
+        mut,
+        seeds = [b"vault", escrow_account.key().as_ref()],
+        bump = escrow_account.vault_bump
+    )]
+    pub vault: UncheckedAccount<'info>,
+
+    pub system_program: Program<'info, System>,
+}
+
+pub fn handler(ctx: Context<Complete>) -> Result<()> {
+    ctx.accounts.escrow_account.state = EscrowState::Complete;
+
+    let escrow_key = ctx.accounts.escrow_account.key();
+    let vault_bump = ctx.accounts.escrow_account.vault_bump;
+    let vault_balance = ctx.accounts.vault.to_account_info().lamports();
+
+    invoke_signed(
+        &system_instruction::transfer(
+            ctx.accounts.vault.to_account_info().key,
+            ctx.accounts.seller.to_account_info().key,
+            vault_balance,
+        ),
+        &[
+            ctx.accounts.vault.to_account_info(),
+            ctx.accounts.seller.to_account_info(),
+        ],
+        &[&[b"vault", escrow_key.as_ref(), &[vault_bump]]],
+    )?;
+
+    Ok(())
+}

programs/descro/src/instructions/create_escrow.rs

@@ -0,0 +1,49 @@
+use anchor_lang::prelude::*;
+use crate::state::{EscrowAccount, EscrowState};
+
+#[derive(Accounts)]
+#[instruction(amount: u64, dispute_resolver: Option<Pubkey>, escrow_id: u64)]
+pub struct CreateEscrow<'info> {
+    #[account(mut)]
+    pub seller: Signer<'info>,
+
+    /// CHECK: Only stored as pubkey, no ownership check needed
+    pub buyer: UncheckedAccount<'info>,
+
+    #[account(
+        init,
+        payer = seller,
+        space = 8 + EscrowAccount::INIT_SPACE,
+        seeds = [b"escrow", seller.key().as_ref(), &escrow_id.to_le_bytes()],
+        bump
+    )]
+    pub escrow_account: Account<'info, EscrowAccount>,
+
+    /// CHECK: PDA vault for holding escrow SOL; created implicitly on deposit
+    #[account(
+        mut,
+        seeds = [b"vault", escrow_account.key().as_ref()],
+        bump
+    )]
+    pub vault: UncheckedAccount<'info>,
+
+    pub system_program: Program<'info, System>,
+}
+
+pub fn handler(
+    ctx: Context<CreateEscrow>,
+    amount: u64,
+    dispute_resolver: Option<Pubkey>,
+    escrow_id: u64,
+) -> Result<()> {
+    let escrow = &mut ctx.accounts.escrow_account;
+    escrow.seller = ctx.accounts.seller.key();
+    escrow.buyer = ctx.accounts.buyer.key();
+    escrow.amount = amount;
+    escrow.dispute_resolver = dispute_resolver;
+    escrow.state = EscrowState::AwaitingDeposit;
+    escrow.bump = ctx.bumps.escrow_account;
+    escrow.vault_bump = ctx.bumps.vault;
+    escrow.escrow_id = escrow_id;
+    Ok(())
+}

programs/descro/src/instructions/deposit.rs

@@ -0,0 +1,48 @@
+use anchor_lang::prelude::*;
+use anchor_lang::solana_program::{program::invoke, system_instruction};
+use crate::state::{EscrowAccount, EscrowState};
+use crate::error::EscrowError;
+
+#[derive(Accounts)]
+pub struct Deposit<'info> {
+    #[account(mut)]
+    pub buyer: Signer<'info>,
+
+    #[account(
+        mut,
+        seeds = [b"escrow", escrow_account.seller.as_ref(), &escrow_account.escrow_id.to_le_bytes()],
+        bump = escrow_account.bump,
+        constraint = buyer.key() == escrow_account.buyer @ EscrowError::Unauthorized,
+        constraint = escrow_account.state == EscrowState::AwaitingDeposit @ EscrowError::InvalidState,
+    )]
+    pub escrow_account: Account<'info, EscrowAccount>,
+
+    /// CHECK: PDA vault receiving the escrowed SOL
+    #[account(
+        mut,
+        seeds = [b"vault", escrow_account.key().as_ref()],
+        bump = escrow_account.vault_bump
+    )]
+    pub vault: UncheckedAccount<'info>,
+
+    pub system_program: Program<'info, System>,
+}
+
+pub fn handler(ctx: Context<Deposit>) -> Result<()> {
+    let amount = ctx.accounts.escrow_account.amount;
+
+    invoke(
+        &system_instruction::transfer(
+            ctx.accounts.buyer.to_account_info().key,
+            ctx.accounts.vault.to_account_info().key,
+            amount,
+        ),
+        &[
+            ctx.accounts.buyer.to_account_info(),
+            ctx.accounts.vault.to_account_info(),
+        ],
+    )?;
+
+    ctx.accounts.escrow_account.state = EscrowState::Active;
+    Ok(())
+}

programs/descro/src/instructions/dispute.rs

@@ -0,0 +1,25 @@
+use anchor_lang::prelude::*;
+use crate::state::{EscrowAccount, EscrowState};
+use crate::error::EscrowError;
+
+#[derive(Accounts)]
+pub struct Dispute<'info> {
+    pub initiator: Signer<'info>,
+
+    #[account(
+        mut,
+        seeds = [b"escrow", escrow_account.seller.as_ref(), &escrow_account.escrow_id.to_le_bytes()],
+        bump = escrow_account.bump,
+        constraint = (
+            initiator.key() == escrow_account.buyer ||
+            initiator.key() == escrow_account.seller
+        ) @ EscrowError::Unauthorized,
+        constraint = escrow_account.state == EscrowState::Active @ EscrowError::InvalidState,
+    )]
+    pub escrow_account: Account<'info, EscrowAccount>,
+}
+
+pub fn handler(ctx: Context<Dispute>) -> Result<()> {
+    ctx.accounts.escrow_account.state = EscrowState::Disputed;
+    Ok(())
+}

programs/descro/src/instructions/initialize.rs

@@ -1,9 +0,0 @@
-use anchor_lang::prelude::*;
-
-#[derive(Accounts)]
-pub struct Initialize {}
-
-pub fn handler(ctx: Context<Initialize>) -> Result<()> {
-    msg!("Greetings from: {:?}", ctx.program_id);
-    Ok(())
-}

programs/descro/src/instructions/resolve.rs

@@ -0,0 +1,79 @@
+use anchor_lang::prelude::*;
+use anchor_lang::solana_program::{program::invoke_signed, system_instruction};
+use crate::state::{EscrowAccount, EscrowState, Winner};
+use crate::error::EscrowError;
+
+#[derive(Accounts)]
+pub struct Resolve<'info> {
+    pub resolver: Signer<'info>,
+
+    /// CHECK: Winner of the dispute, receives vault funds
+    #[account(mut)]
+    pub winner: UncheckedAccount<'info>,
+
+    /// CHECK: Seller receives escrow account rent on close
+    #[account(
+        mut,
+        constraint = seller.key() == escrow_account.seller @ EscrowError::Unauthorized,
+    )]
+    pub seller: UncheckedAccount<'info>,
+
+    #[account(
+        mut,
+        seeds = [b"escrow", escrow_account.seller.as_ref(), &escrow_account.escrow_id.to_le_bytes()],
+        bump = escrow_account.bump,
+        constraint = escrow_account.state == EscrowState::Disputed @ EscrowError::InvalidState,
+        close = seller,
+    )]
+    pub escrow_account: Account<'info, EscrowAccount>,
+
+    /// CHECK: PDA vault from which SOL is released to the winner
+    #[account(
+        mut,
+        seeds = [b"vault", escrow_account.key().as_ref()],
+        bump = escrow_account.vault_bump
+    )]
+    pub vault: UncheckedAccount<'info>,
+
+    pub system_program: Program<'info, System>,
+}
+
+pub fn handler(ctx: Context<Resolve>, winner: Winner) -> Result<()> {
+    let escrow = &ctx.accounts.escrow_account;
+
+    require!(escrow.dispute_resolver.is_some(), EscrowError::NoResolverConfigured);
+    require!(
+        ctx.accounts.resolver.key() == escrow.dispute_resolver.unwrap(),
+        EscrowError::UnauthorizedResolver
+    );
+
+    let expected_winner = match winner {
+        Winner::Buyer => escrow.buyer,
+        Winner::Seller => escrow.seller,
+    };
+    require!(
+        ctx.accounts.winner.key() == expected_winner,
+        EscrowError::Unauthorized
+    );
+
+    ctx.accounts.escrow_account.state = EscrowState::Complete;
+
+    let escrow_key = ctx.accounts.escrow_account.key();
+    let vault_bump = ctx.accounts.escrow_account.vault_bump;
+    let vault_balance = ctx.accounts.vault.to_account_info().lamports();
+
+    invoke_signed(
+        &system_instruction::transfer(
+            ctx.accounts.vault.to_account_info().key,
+            ctx.accounts.winner.to_account_info().key,
+            vault_balance,
+        ),
+        &[
+            ctx.accounts.vault.to_account_info(),
+            ctx.accounts.winner.to_account_info(),
+        ],
+        &[&[b"vault", escrow_key.as_ref(), &[vault_bump]]],
+    )?;
+
+    Ok(())
+}

programs/descro/src/lib.rs

@@ -5,7 +5,7 @@ pub mod state;
 
 use anchor_lang::prelude::*;
 
-pub use constants::*;
+pub use error::*;
 pub use instructions::*;
 pub use state::*;
 
@@ -15,7 +15,32 @@ declare_id!("DjVR4EuYV6USMJFfsGZwhZ3y8rtWsmG8EvDY96GTqqi3");
 pub mod descro {
     use super::*;
 
-    pub fn initialize(ctx: Context<Initialize>) -> Result<()> {
-        initialize::handler(ctx)
+    pub fn create_escrow(
+        ctx: Context<CreateEscrow>,
+        amount: u64,
+        dispute_resolver: Option<Pubkey>,
+        escrow_id: u64,
+    ) -> Result<()> {
+        create_escrow::handler(ctx, amount, dispute_resolver, escrow_id)
+    }
+
+    pub fn deposit(ctx: Context<Deposit>) -> Result<()> {
+        deposit::handler(ctx)
+    }
+
+    pub fn complete(ctx: Context<Complete>) -> Result<()> {
+        complete::handler(ctx)
+    }
+
+    pub fn dispute(ctx: Context<Dispute>) -> Result<()> {
+        dispute::handler(ctx)
+    }
+
+    pub fn resolve(ctx: Context<Resolve>, winner: Winner) -> Result<()> {
+        resolve::handler(ctx, winner)
+    }
+
+    pub fn cancel(ctx: Context<Cancel>) -> Result<()> {
+        cancel::handler(ctx)
     }
 }

programs/descro/src/state.rs

@@ -0,0 +1,29 @@
+use anchor_lang::prelude::*;
+
+#[account]
+#[derive(InitSpace)]
+pub struct EscrowAccount {
+    pub seller: Pubkey,
+    pub buyer: Pubkey,
+    pub amount: u64,
+    pub dispute_resolver: Option<Pubkey>,
+    pub state: EscrowState,
+    pub bump: u8,
+    pub vault_bump: u8,
+    pub escrow_id: u64,
+}
+
+#[derive(AnchorSerialize, AnchorDeserialize, Clone, PartialEq, InitSpace, Debug)]
+pub enum EscrowState {
+    AwaitingDeposit,
+    Active,
+    Disputed,
+    Complete,
+    Cancelled,
+}
+
+#[derive(AnchorSerialize, AnchorDeserialize, Clone, PartialEq)]
+pub enum Winner {
+    Buyer,
+    Seller,
+}

programs/descro/tests/escrow_tests.rs

@@ -0,0 +1,525 @@
+use {
+    anchor_lang::{
+        solana_program::{instruction::Instruction, system_program},
+        AccountDeserialize, InstructionData, ToAccountMetas,
+    },
+    descro::{EscrowAccount, EscrowState, Winner},
+    litesvm::LiteSVM,
+    solana_keypair::Keypair,
+    solana_message::{Message, VersionedMessage},
+    solana_signer::Signer,
+    solana_transaction::versioned::VersionedTransaction,
+};
+use anchor_lang::prelude::Pubkey;
+
+const AMOUNT: u64 = 1_000_000_000; // 1 SOL
+const ESCROW_ID: u64 = 1;
+
+// ── helpers ──────────────────────────────────────────────────────────────────
+
+fn setup() -> (LiteSVM, Keypair, Keypair, Keypair) {
+    let program_id = descro::id();
+    let mut svm = LiteSVM::new();
+    let bytes = include_bytes!("../../../target/deploy/descro.so");
+    svm.add_program(program_id, bytes).unwrap();
+
+    let seller = Keypair::new();
+    let buyer = Keypair::new();
+    let resolver = Keypair::new();
+
+    svm.airdrop(&seller.pubkey(), 10_000_000_000).unwrap();
+    svm.airdrop(&buyer.pubkey(), 10_000_000_000).unwrap();
+    svm.airdrop(&resolver.pubkey(), 1_000_000_000).unwrap();
+
+    (svm, seller, buyer, resolver)
+}
+
+fn escrow_pda(seller: &Pubkey, escrow_id: u64) -> Pubkey {
+    Pubkey::find_program_address(
+        &[b"escrow", seller.as_ref(), &escrow_id.to_le_bytes()],
+        &descro::id(),
+    )
+    .0
+}
+
+fn vault_pda(escrow: &Pubkey) -> Pubkey {
+    Pubkey::find_program_address(&[b"vault", escrow.as_ref()], &descro::id()).0
+}
+
+fn send(svm: &mut LiteSVM, ix: Instruction, payer: &Keypair) {
+    let blockhash = svm.latest_blockhash();
+    let msg = Message::new_with_blockhash(&[ix], Some(&payer.pubkey()), &blockhash);
+    let tx = VersionedTransaction::try_new(VersionedMessage::Legacy(msg), &[payer]).unwrap();
+    svm.send_transaction(tx).expect("transaction failed");
+}
+
+fn try_send(svm: &mut LiteSVM, ix: Instruction, payer: &Keypair) -> bool {
+    let blockhash = svm.latest_blockhash();
+    let msg = Message::new_with_blockhash(&[ix], Some(&payer.pubkey()), &blockhash);
+    let tx = VersionedTransaction::try_new(VersionedMessage::Legacy(msg), &[payer]).unwrap();
+    svm.send_transaction(tx).is_ok()
+}
+
+fn ix_create_escrow(
+    seller: &Pubkey,
+    buyer: &Pubkey,
+    amount: u64,
+    dispute_resolver: Option<Pubkey>,
+    escrow_id: u64,
+) -> Instruction {
+    let escrow = escrow_pda(seller, escrow_id);
+    let vault = vault_pda(&escrow);
+    Instruction::new_with_bytes(
+        descro::id(),
+        &descro::instruction::CreateEscrow { amount, dispute_resolver, escrow_id }.data(),
+        descro::accounts::CreateEscrow {
+            seller: *seller,
+            buyer: *buyer,
+            escrow_account: escrow,
+            vault,
+            system_program: system_program::ID,
+        }
+        .to_account_metas(None),
+    )
+}
+
+fn ix_deposit(buyer: &Pubkey, seller: &Pubkey, escrow_id: u64) -> Instruction {
+    let escrow = escrow_pda(seller, escrow_id);
+    let vault = vault_pda(&escrow);
+    Instruction::new_with_bytes(
+        descro::id(),
+        &descro::instruction::Deposit {}.data(),
+        descro::accounts::Deposit {
+            buyer: *buyer,
+            escrow_account: escrow,
+            vault,
+            system_program: system_program::ID,
+        }
+        .to_account_metas(None),
+    )
+}
+
+fn ix_complete(buyer: &Pubkey, seller: &Pubkey, escrow_id: u64) -> Instruction {
+    let escrow = escrow_pda(seller, escrow_id);
+    let vault = vault_pda(&escrow);
+    Instruction::new_with_bytes(
+        descro::id(),
+        &descro::instruction::Complete {}.data(),
+        descro::accounts::Complete {
+            buyer: *buyer,
+            seller: *seller,
+            escrow_account: escrow,
+            vault,
+            system_program: system_program::ID,
+        }
+        .to_account_metas(None),
+    )
+}
+
+fn ix_dispute(initiator: &Pubkey, seller: &Pubkey, escrow_id: u64) -> Instruction {
+    let escrow = escrow_pda(seller, escrow_id);
+    Instruction::new_with_bytes(
+        descro::id(),
+        &descro::instruction::Dispute {}.data(),
+        descro::accounts::Dispute {
+            initiator: *initiator,
+            escrow_account: escrow,
+        }
+        .to_account_metas(None),
+    )
+}
+
+fn ix_resolve(
+    resolver: &Pubkey,
+    winner_pubkey: &Pubkey,
+    seller: &Pubkey,
+    escrow_id: u64,
+    winner: Winner,
+) -> Instruction {
+    let escrow = escrow_pda(seller, escrow_id);
+    let vault = vault_pda(&escrow);
+    Instruction::new_with_bytes(
+        descro::id(),
+        &descro::instruction::Resolve { winner }.data(),
+        descro::accounts::Resolve {
+            resolver: *resolver,
+            winner: *winner_pubkey,
+            seller: *seller,
+            escrow_account: escrow,
+            vault,
+            system_program: system_program::ID,
+        }
+        .to_account_metas(None),
+    )
+}
+
+fn ix_cancel(seller: &Pubkey, escrow_id: u64) -> Instruction {
+    let escrow = escrow_pda(seller, escrow_id);
+    Instruction::new_with_bytes(
+        descro::id(),
+        &descro::instruction::Cancel {}.data(),
+        descro::accounts::Cancel {
+            seller: *seller,
+            escrow_account: escrow,
+            system_program: system_program::ID,
+        }
+        .to_account_metas(None),
+    )
+}
+
+fn read_escrow(svm: &LiteSVM, seller: &Pubkey, escrow_id: u64) -> EscrowAccount {
+    let escrow = escrow_pda(seller, escrow_id);
+    let account = svm.get_account(&escrow).expect("escrow account not found");
+    EscrowAccount::try_deserialize(&mut account.data.as_slice()).unwrap()
+}
+
+// ── tests ─────────────────────────────────────────────────────────────────────
+
+#[test]
+fn test_create_escrow() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    let ix = ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID);
+    send(&mut svm, ix, &seller);
+
+    let escrow = read_escrow(&svm, &seller.pubkey(), ESCROW_ID);
+    assert_eq!(escrow.seller, seller.pubkey());
+    assert_eq!(escrow.buyer, buyer.pubkey());
+    assert_eq!(escrow.amount, AMOUNT);
+    assert_eq!(escrow.state, EscrowState::AwaitingDeposit);
+    assert!(escrow.dispute_resolver.is_none());
+}
+
+#[test]
+fn test_create_escrow_with_resolver() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    let ix = ix_create_escrow(
+        &seller.pubkey(),
+        &buyer.pubkey(),
+        AMOUNT,
+        Some(resolver.pubkey()),
+        ESCROW_ID,
+    );
+    send(&mut svm, ix, &seller);
+
+    let escrow = read_escrow(&svm, &seller.pubkey(), ESCROW_ID);
+    assert_eq!(escrow.dispute_resolver, Some(resolver.pubkey()));
+}
+
+#[test]
+fn test_deposit() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    let vault = vault_pda(&escrow_pda(&seller.pubkey(), ESCROW_ID));
+    let vault_before = svm.get_account(&vault).map(|a| a.lamports).unwrap_or(0);
+
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let escrow = read_escrow(&svm, &seller.pubkey(), ESCROW_ID);
+    assert_eq!(escrow.state, EscrowState::Active);
+
+    let vault_after = svm.get_account(&vault).map(|a| a.lamports).unwrap_or(0);
+    assert_eq!(vault_after - vault_before, AMOUNT);
+}
+
+#[test]
+fn test_complete_flow() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let seller_before = svm.get_account(&seller.pubkey()).map(|a| a.lamports).unwrap_or(0);
+
+    send(
+        &mut svm,
+        ix_complete(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID),
+        &buyer,
+    );
+
+    // Escrow account should be closed
+    assert!(svm.get_account(&escrow_pda(&seller.pubkey(), ESCROW_ID)).is_none());
+    // Seller should have received the funds
+    let seller_after = svm.get_account(&seller.pubkey()).map(|a| a.lamports).unwrap_or(0);
+    assert!(seller_after > seller_before);
+}
+
+#[test]
+fn test_dispute_by_buyer() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+    send(&mut svm, ix_dispute(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let escrow = read_escrow(&svm, &seller.pubkey(), ESCROW_ID);
+    assert_eq!(escrow.state, EscrowState::Disputed);
+}
+
+#[test]
+fn test_dispute_by_seller() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+    send(&mut svm, ix_dispute(&seller.pubkey(), &seller.pubkey(), ESCROW_ID), &seller);
+
+    let escrow = read_escrow(&svm, &seller.pubkey(), ESCROW_ID);
+    assert_eq!(escrow.state, EscrowState::Disputed);
+}
+
+#[test]
+fn test_resolve_seller_wins() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(
+            &seller.pubkey(),
+            &buyer.pubkey(),
+            AMOUNT,
+            Some(resolver.pubkey()),
+            ESCROW_ID,
+        ),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+    send(&mut svm, ix_dispute(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let seller_before = svm.get_account(&seller.pubkey()).map(|a| a.lamports).unwrap_or(0);
+
+    send(
+        &mut svm,
+        ix_resolve(
+            &resolver.pubkey(),
+            &seller.pubkey(),
+            &seller.pubkey(),
+            ESCROW_ID,
+            Winner::Seller,
+        ),
+        &resolver,
+    );
+
+    assert!(svm.get_account(&escrow_pda(&seller.pubkey(), ESCROW_ID)).is_none());
+    let seller_after = svm.get_account(&seller.pubkey()).map(|a| a.lamports).unwrap_or(0);
+    assert!(seller_after > seller_before);
+}
+
+#[test]
+fn test_resolve_buyer_wins() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(
+            &seller.pubkey(),
+            &buyer.pubkey(),
+            AMOUNT,
+            Some(resolver.pubkey()),
+            ESCROW_ID,
+        ),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+    send(&mut svm, ix_dispute(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let buyer_before = svm.get_account(&buyer.pubkey()).map(|a| a.lamports).unwrap_or(0);
+
+    send(
+        &mut svm,
+        ix_resolve(
+            &resolver.pubkey(),
+            &buyer.pubkey(),
+            &seller.pubkey(),
+            ESCROW_ID,
+            Winner::Buyer,
+        ),
+        &resolver,
+    );
+
+    let buyer_after = svm.get_account(&buyer.pubkey()).map(|a| a.lamports).unwrap_or(0);
+    assert!(buyer_after > buyer_before);
+}
+
+#[test]
+fn test_cancel() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+
+    let seller_before = svm.get_account(&seller.pubkey()).map(|a| a.lamports).unwrap_or(0);
+    send(&mut svm, ix_cancel(&seller.pubkey(), ESCROW_ID), &seller);
+
+    // Escrow account closed, rent returned
+    assert!(svm.get_account(&escrow_pda(&seller.pubkey(), ESCROW_ID)).is_none());
+    let seller_after = svm.get_account(&seller.pubkey()).map(|a| a.lamports).unwrap_or(0);
+    assert!(seller_after > seller_before);
+}
+
+// ── error cases ───────────────────────────────────────────────────────────────
+
+#[test]
+fn test_deposit_wrong_buyer_fails() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+
+    // resolver is NOT the buyer — should fail
+    let bad_ix = ix_deposit(&resolver.pubkey(), &seller.pubkey(), ESCROW_ID);
+    assert!(!try_send(&mut svm, bad_ix, &resolver));
+}
+
+#[test]
+fn test_complete_wrong_state_fails() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    // Not deposited yet — state is AwaitingDeposit, not Active
+    let bad_ix = ix_complete(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID);
+    assert!(!try_send(&mut svm, bad_ix, &buyer));
+}
+
+#[test]
+fn test_complete_wrong_buyer_fails() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    // resolver is not the buyer
+    let bad_ix = ix_complete(&resolver.pubkey(), &seller.pubkey(), ESCROW_ID);
+    assert!(!try_send(&mut svm, bad_ix, &resolver));
+}
+
+#[test]
+fn test_resolve_no_resolver_fails() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    // Create escrow WITHOUT a resolver
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+    send(&mut svm, ix_dispute(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let bad_ix = ix_resolve(
+        &resolver.pubkey(),
+        &seller.pubkey(),
+        &seller.pubkey(),
+        ESCROW_ID,
+        Winner::Seller,
+    );
+    assert!(!try_send(&mut svm, bad_ix, &resolver));
+}
+
+#[test]
+fn test_resolve_wrong_resolver_fails() {
+    let (mut svm, seller, buyer, resolver) = setup();
+    let wrong_resolver = Keypair::new();
+    svm.airdrop(&wrong_resolver.pubkey(), 1_000_000_000).unwrap();
+
+    send(
+        &mut svm,
+        ix_create_escrow(
+            &seller.pubkey(),
+            &buyer.pubkey(),
+            AMOUNT,
+            Some(resolver.pubkey()),
+            ESCROW_ID,
+        ),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+    send(&mut svm, ix_dispute(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    let bad_ix = ix_resolve(
+        &wrong_resolver.pubkey(),
+        &seller.pubkey(),
+        &seller.pubkey(),
+        ESCROW_ID,
+        Winner::Seller,
+    );
+    assert!(!try_send(&mut svm, bad_ix, &wrong_resolver));
+}
+
+#[test]
+fn test_cancel_after_deposit_fails() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    // State is now Active, cancel requires AwaitingDeposit
+    let bad_ix = ix_cancel(&seller.pubkey(), ESCROW_ID);
+    assert!(!try_send(&mut svm, bad_ix, &seller));
+}
+
+#[test]
+fn test_dispute_wrong_state_fails() {
+    let (mut svm, seller, buyer, _resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    // No deposit — state is AwaitingDeposit, dispute requires Active
+    let bad_ix = ix_dispute(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID);
+    assert!(!try_send(&mut svm, bad_ix, &buyer));
+}
+
+#[test]
+fn test_dispute_third_party_fails() {
+    let (mut svm, seller, buyer, resolver) = setup();
+
+    send(
+        &mut svm,
+        ix_create_escrow(&seller.pubkey(), &buyer.pubkey(), AMOUNT, None, ESCROW_ID),
+        &seller,
+    );
+    send(&mut svm, ix_deposit(&buyer.pubkey(), &seller.pubkey(), ESCROW_ID), &buyer);
+
+    // Resolver is neither buyer nor seller
+    let bad_ix = ix_dispute(&resolver.pubkey(), &seller.pubkey(), ESCROW_ID);
+    assert!(!try_send(&mut svm, bad_ix, &resolver));
+}

programs/descro/tests/test_initialize.rs

@@ -1,32 +0,0 @@
-
-use {
-    anchor_lang::{solana_program::instruction::Instruction, InstructionData, ToAccountMetas},
-    litesvm::LiteSVM,
-    solana_message::{Message, VersionedMessage},
-    solana_signer::Signer,
-    solana_keypair::Keypair,
-    solana_transaction::versioned::VersionedTransaction,
-};
-
-#[test]
-fn test_initialize() {
-    let program_id = descro::id();
-    let payer = Keypair::new();
-    let mut svm = LiteSVM::new();
-    let bytes = include_bytes!("../../../target/deploy/descro.so");
-    svm.add_program(program_id, bytes).unwrap();
-    svm.airdrop(&payer.pubkey(), 1_000_000_000).unwrap();
-    
-    let instruction = Instruction::new_with_bytes(
-        program_id,
-        &descro::instruction::Initialize {}.data(),
-        descro::accounts::Initialize {}.to_account_metas(None),
-    );
-
-    let blockhash = svm.latest_blockhash();
-    let msg = Message::new_with_blockhash(&[instruction], Some(&payer.pubkey()), &blockhash);
-    let tx = VersionedTransaction::try_new(VersionedMessage::Legacy(msg), &[payer]).unwrap();
-
-    let res = svm.send_transaction(tx);
-    assert!(res.is_ok());
-}