fix(svm): consistent anchor token constraints

programs/svm-spoke/src/instructions/deposit.rs

@@ -57,7 +57,6 @@ pub struct DepositV3<'info> {
     )]
     pub vault: InterfaceAccount<'info, TokenAccount>,
 
-    // TODO: why are we using mint::token_program,token::token_program and associated_token::token_program?
     #[account(
         mint::token_program = token_program,
         // IDL build fails when requiring `address = input_token` for mint, thus using a custom constraint.

programs/svm-spoke/src/instructions/fill.rs

@@ -28,16 +28,16 @@ pub struct FillV3Relay<'info> {
     pub signer: Signer<'info>,
 
     #[account(
-        token::token_program = token_program, // TODO: consistent token imports
+        mint::token_program = token_program,
         address = relay_data.output_token @ CustomError::InvalidMint
     )]
     pub mint_account: InterfaceAccount<'info, Mint>,
 
     #[account(
         mut,
-        associated_token::mint = mint_account, // TODO: consistent token imports
-        associated_token::authority = signer,
-        associated_token::token_program = token_program
+        token::mint = mint_account,
+        token::authority = signer,
+        token::token_program = token_program
     )]
     pub relayer_token_account: InterfaceAccount<'info, TokenAccount>,
 

programs/svm-spoke/src/instructions/slow_fill.rs

@@ -149,7 +149,7 @@ pub struct ExecuteV3SlowRelayLeaf<'info> {
     pub fill_status: Account<'info, FillStatusAccount>,
 
     #[account(
-        token::token_program = token_program,
+        mint::token_program = token_program,
         address = slow_fill_leaf.relay_data.output_token @ CustomError::InvalidMint
     )]
     pub mint: InterfaceAccount<'info, Mint>,

test/svm/SvmSpoke.Fill.ts

@@ -3,6 +3,7 @@ import { BN } from "@coral-xyz/anchor";
 import {
   ASSOCIATED_TOKEN_PROGRAM_ID,
   TOKEN_PROGRAM_ID,
+  createAccount,
   createMint,
   getOrCreateAssociatedTokenAccount,
   mintTo,
@@ -390,4 +391,34 @@ describe("svm_spoke.fill", () => {
       "Token Program should not be invoked"
     );
   });
+
+  it("Fills a V3 relay from custom relayer token account", async () => {
+    // Create and mint to custom relayer token account
+    const customKeypair = Keypair.generate();
+    const customRelayerTA = await createAccount(connection, payer, mint, relayer.publicKey, customKeypair);
+    await mintTo(connection, payer, mint, customRelayerTA, owner, seedBalance);
+
+    // Save balances before the the fill
+    const iRelayerBal = (await getAccount(connection, customRelayerTA)).amount;
+    const iRecipientBal = (await getAccount(connection, recipientTA)).amount;
+
+    // Fill relay from custom relayer token account
+    accounts.relayerTokenAccount = customRelayerTA;
+    const relayHash = Array.from(calculateRelayHashUint8Array(relayData, chainId));
+    await program.methods
+      .fillV3Relay(relayHash, relayData, new BN(1), relayer.publicKey)
+      .accounts(accounts)
+      .signers([relayer])
+      .rpc();
+
+    // Verify balances after the fill
+    const fRelayerBal = (await getAccount(connection, customRelayerTA)).amount;
+    const fRecipientBal = (await getAccount(connection, recipientTA)).amount;
+    assertSE(fRelayerBal, iRelayerBal - BigInt(relayAmount), "Relayer's balance should be reduced by the relay amount");
+    assertSE(
+      fRecipientBal,
+      iRecipientBal + BigInt(relayAmount),
+      "Recipient's balance should be increased by the relay amount"
+    );
+  });
 });