Chainremit

    )]    pub escrow: Account<'info, Escrow>,     pub system_program: Program<'info, System>,} #[derive(Accounts)]pub struct CancelEscrow<'info> {    #[account(mut)]    pub sender: Signer<'info>,     #[account(        mut,        close = sender,        has_one = sender,        seeds = [b"escrow", sender.key().as_ref(), &escrow.escrow_id],        bump = escrow.bump    )]    pub escrow: Account<'info, Escrow>,     pub system_program: Program<'info, System>,} #[derive(Accounts)]

1. Line 94 pub sender: Signer<'info>,: Requires this account to have signed the transaction.
2. Line 98 close = sender,: Closes the account at the end of the instruction and refunds its lamports.
3. Line 99 has_one = sender,: Checks that a stored pubkey field matches the passed account.
4. Line 100 seeds = [b"escrow", sender.key().as_ref(), &escrow.escrow_id],: Declares the PDA seeds. Anchor re-derives the address and rejects the account if it doesn't match.
5. Line 101 bump = escrow.bump: Uses the bump seed, the extra byte that pushes the derived address off the ed25519 curve.

            payoutMethod,            recipientHint,          }),        })        setCreated(out)        setTxExplorerUrl(null)      } else {        if (!wallet.connected) {          setVisible(true)          return        }        if (!wallet.publicKey) throw new Error('Connect Phantom wallet first')        if (!wallet.sendTransaction) throw new Error('Wallet does not support sending transactions')         const escrowId = crypto.getRandomValues(new Uint8Array(16))        const claimTokenBytes = crypto.getRandomValues(new Uint8Array(32))        const claimToken = toBase64Url(claimTokenBytes)        const claimHash = await sha256(claimTokenBytes)        const amountLamports = parseAmountLamports(amount)         const [escrowPda] = PublicKey.findProgramAddressSync(          [new TextEncoder().encode('escrow'), wallet.publicKey.toBytes(), escrowId],          PROGRAM_ID,        )

1. Line 841 if (!wallet.sendTransaction) throw new Error('Wallet does not support sending transactions: Submits the signed transaction to the cluster.
2. Line 849 const [escrowPda] = PublicKey.findProgramAddressSync(: Derives a PDA from seeds and the program ID and returns the address with its canonical bump.