;
};
Capture an authorization when the order is ready to settle. The operator transfers all or part of the escrowed amount to the receiver and fee receiver without collecting from the payer again.
## Demo
The demo above is mock only. If you want to see onchain demos on Vibenet, head to [Base chain demos](https://chain.base.org/demos).
## Check and Capture
Read `paymentState(paymentInfoHash)` before capture. The amount must be nonzero, no greater than `capturableAmount`, and submitted strictly before `authorizationExpiry`.
The operator supplies an absolute `feeAmount` in raw token units. The protocol validates it against the per-capture `minFeeBps` and `maxFeeBps` stored in `PaymentInfo`.
```typescript TypeScript lines wrap expandable highlight={8-11,16-17} theme={null}
export async function captureAuthorization(
payment: StoredProtocolPayment,
amount = payment.paymentInfo.maxAmount,
) {
const [, capturableAmount] = await publicClient.readContract({
address: AUTH_CAPTURE_ESCROW,
abi: authCaptureEscrowAbi,
functionName: "paymentState",
args: [payment.paymentInfoHash],
});
if (amount > capturableAmount) throw new Error("Capture exceeds authorized amount");
const simulation = await publicClient.simulateContract({
account,
address: AUTH_CAPTURE_ESCROW,
abi: authCaptureEscrowAbi,
functionName: "capture",
args: [payment.paymentInfo, amount, 0n, zeroAddress],
});
const hash = await walletClient.writeContract(simulation.request);
const receipt = await publicClient.waitForTransactionReceipt({ hash, confirmations: 2 });
if (receipt.status !== "success") throw new Error("Payment capture reverted");
return receipt;
}
```
Capture decreases `capturableAmount` and increases `refundableAmount` by the same gross amount. The receiver gets the gross amount minus fees.
Verify `PaymentCaptured(paymentInfoHash, amount, feeAmount, feeReceiver)` and the expected receiver transfers before marking the fulfillment increment settled.
At `authorizationExpiry`, capture is no longer available and the payer can reclaim the remaining balance. Use chain time rather than an application server clock when enforcing the deadline.
## See Also
Settle split shipments or a reduced final total.
Return previously captured value to the payer.