I'm trying to write a code that transfers SOL from a vault(A PDA) to another address and my code looks like this ''' pub fn withdraw(ctx: Context,amount:u64) -> Result<()> { let fundraiser_state = &mut ctx.accounts.fundraiser_state; if Status::from(fundraiser_state.status)? != Status::CampaignEnded { fundraiser_state.status = Status::CampaignEnded.to_u8(); } let fund_starter = ctx.accounts.fund_starter.key(); // let(fund_pda,fund_bump) = Pubkey::find_program_address( // &[fund_starter.as_ref()], // ctx.program_id); let bump = ctx.bumps.get("vault").unwrap(); let seeds = &[fund_starter.as_ref(),&[*bump]]; let signer = [&seeds[..]];

    invoke_signed(
        &system_instruction::transfer(
            &ctx.accounts.vault.key(),
            &ctx.accounts.destination.key(),
            amount,
        ),
         &[
            ctx.accounts.vault.to_account_info().clone(),
            ctx.accounts.destination.to_account_info().clone(),
            ctx.accounts.system_program.to_account_info().clone(),
         ],
         &signer,
        )?;

    Ok(())

''' and here is what the Account structs looks like ''' #[derive(Accounts)] pub struct Withdraw <'info> { #[account( mut, seeds = [ACCOUNT_SEED.as_ref()], bump , has_one = fund_starter, )] fundraiser_state : Account<'info,Fundraising>, /// CHECK: #[account( mut, seeds =[fund_starter.key().as_ref()], bump )] vault : AccountInfo<'info>, /// CHECK : fund_starter : AccountInfo<'info>, ///CHECK: #[account(mut)] destination : Signer<'info>, system_program : Program<'info,System>, } ''' I also write a test for it which brings 'Error: Signature verification failed', and it looks like this, ''' it("withdraw money from the fundraising", async () => { const receivers = (await feePayer()); const amount = new anchor.BN(100000); //const destinations = anchor.web3.Keypair.generate() const [adminPda,_bump] = await anchor.web3.PublicKey.findProgramAddress( [Buffer.from(ACCOUNT_SEED)], program.programId ); const [vaultPda,vaultBump] = await anchor.web3.PublicKey.findProgramAddress( [admin.publicKey.toBuffer()], program.programId ); console.log("the vault is :",vaultPda); console.log("the bump is :",vaultBump); let tx = await program.rpc.withdraw(amount,{ accounts : { fundraiserState : adminPda, vault : vaultPda, fundStarter : admin.publicKey, destination: receivers.publicKey, systemProgram : SystemProgram.programId }, //signers : [receivers] }); console.log("tx is : ",tx); ''' The program builds succesfully but when i run the anchor test commands, i get the "Error: Signature verification failed",

I'm trying to write a code that transfers SOL from a vault(A PDA) to another address and my code looks like this

 pub fn withdraw(ctx: Context<Withdraw>,amount:u64) -> Result<()> {
        let fundraiser_state = &mut ctx.accounts.fundraiser_state;
        if Status::from(fundraiser_state.status)? != Status::CampaignEnded {
            fundraiser_state.status = Status::CampaignEnded.to_u8();
        }
         let fund_starter = ctx.accounts.fund_starter.key();
        //    let(fund_pda,fund_bump) = Pubkey::find_program_address(
        //       &[fund_starter.as_ref()],
        //       ctx.program_id);
        let bump = ctx.bumps.get("vault").unwrap();
         let seeds = &[fund_starter.as_ref(),&[*bump]];
         let signer = [&seeds[..]];
        
        invoke_signed(
            &system_instruction::transfer(
                &ctx.accounts.vault.key(),
                &ctx.accounts.destination.key(),
                amount,
            ),
             &[
                ctx.accounts.vault.to_account_info().clone(),
                ctx.accounts.destination.to_account_info().clone(),
                ctx.accounts.system_program.to_account_info().clone(),
             ],
             &signer,
            )?;

        Ok(())

and here is what the Account structs looks like

#[derive(Accounts)]
pub struct Withdraw <'info> {
    #[account(
        mut,
        seeds = [ACCOUNT_SEED.as_ref()],
        bump ,
        has_one = fund_starter,
    )] 
    fundraiser_state : Account<'info,Fundraising>,
    /// CHECK:
    #[account(
        mut,
        seeds =[fund_starter.key().as_ref()],
        bump 
    )] 
    vault : AccountInfo<'info>,
    /// CHECK :
    fund_starter : AccountInfo<'info>,
    ///CHECK:
    #[account(mut)]
    destination : Signer<'info>,
    system_program : Program<'info,System>,
}

I also write a test for it which brings 'Error: Signature verification failed', and it looks like this,

it("withdraw money from the fundraising", async () => {
    const receivers = (await feePayer());
    const amount  = new anchor.BN(100000);
    //const destinations = anchor.web3.Keypair.generate()
    const [adminPda,_bump] = await anchor.web3.PublicKey.findProgramAddress(
      [Buffer.from(ACCOUNT_SEED)],
      program.programId
    );
    const [vaultPda,vaultBump] = await anchor.web3.PublicKey.findProgramAddress(
      [admin.publicKey.toBuffer()],
      program.programId
    );
    console.log("the vault is :",vaultPda);
    console.log("the bump is :",vaultBump);
    let tx = await program.rpc.withdraw(amount,{
      accounts : {
        fundraiserState : adminPda,
        vault : vaultPda,
        fundStarter : admin.publicKey,
        destination: receivers.publicKey,
        systemProgram : SystemProgram.programId
      },
      //signers : [receivers]
    });
    console.log("tx is : ",tx);

The program builds succesfully but when i run the anchor test commands, i get the "Error: Signature verification failed",