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Payment Method Types

This object is the return value of the CreatePaymentFn.

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interface CreatePaymentResult {    amount: number;    state: Exclude<PaymentState, 'Error'>;    transactionId?: string;    errorMessage?: string;    metadata?: PaymentMetadata;}

amount

propertynumber

The amount (as an integer - i.e. $10 = 1000) that this payment is for. Typically this should equal the Order total, unless multiple payment methods are being used for the order.

state

propertyExclude<PaymentState, 'Error'>

The PaymentState of the resulting Payment.

In a single-step payment flow, this should be set to 'Settled'. In a two-step flow, this should be set to 'Authorized'.

If using a PaymentProcess, may be something else entirely according to your business logic.

transactionId

propertystring

The unique payment reference code typically assigned by the payment provider.

errorMessage

propertystring

If the payment is declined or fails for ome other reason, pass the relevant error message here, and it gets returned with the ErrorResponse of the addPaymentToOrder mutation.

metadata

propertyPaymentMetadata

This field can be used to store other relevant data which is often provided by the payment provider, such as security data related to the payment method or data used in troubleshooting or debugging.

Any data stored in the optional public property will be available via the Shop API. This is useful for certain checkout flows such as external gateways, where the payment provider returns a unique url which must then be passed to the storefront app.

This object is the return value of the CreatePaymentFn when there has been an error.

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interface CreatePaymentErrorResult {    amount: number;    state: 'Error';    transactionId?: string;    errorMessage: string;    metadata?: PaymentMetadata;}

amount

propertynumber

state

property'Error'

transactionId

propertystring

errorMessage

propertystring

metadata

propertyPaymentMetadata

This object is the return value of the CreateRefundFn.

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interface CreateRefundResult {    state: RefundState;    transactionId?: string;    metadata?: PaymentMetadata;}

state

propertyRefundState

transactionId

propertystring

metadata

propertyPaymentMetadata

This object is the return value of the SettlePaymentFn when the Payment has been successfully settled.

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interface SettlePaymentResult {    success: true;    metadata?: PaymentMetadata;}

success

propertytrue

metadata

propertyPaymentMetadata

This object is the return value of the SettlePaymentFn when the Payment could not be settled.

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interface SettlePaymentErrorResult {    success: false;    state?: Exclude<PaymentState, 'Settled'>;    errorMessage?: string;    metadata?: PaymentMetadata;}

success

propertyfalse

state

propertyExclude<PaymentState, 'Settled'>

The state to transition this Payment to upon unsuccessful settlement. Defaults to Error. Note that if using a different state, it must be legal to transition to that state from the Authorized state according to the PaymentState config (which can be customized using the PaymentProcess).

errorMessage

propertystring

The message that will be returned when attempting to settle the payment, and will also be persisted as Payment.errorMessage.

metadata

propertyPaymentMetadata

This object is the return value of the CancelPaymentFn when the Payment has been successfully cancelled.

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interface CancelPaymentResult {    success: true;    metadata?: PaymentMetadata;}

success

propertytrue

metadata

propertyPaymentMetadata

This object is the return value of the CancelPaymentFn when the Payment could not be cancelled.

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interface CancelPaymentErrorResult {    success: false;    state?: Exclude<PaymentState, 'Cancelled'>;    errorMessage?: string;    metadata?: PaymentMetadata;}

success

propertyfalse

state

propertyExclude<PaymentState, 'Cancelled'>

The state to transition this Payment to upon unsuccessful cancellation. Defaults to Error. Note that if using a different state, it must be legal to transition to that state from the Authorized state according to the PaymentState config (which can be customized using the PaymentProcess).

errorMessage

propertystring

The message that will be returned when attempting to cancel the payment, and will also be persisted as Payment.errorMessage.

metadata

propertyPaymentMetadata

This function contains the logic for creating a payment. See PaymentMethodHandler for an example.

Returns a CreatePaymentResult.

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type CreatePaymentFn<T extends ConfigArgs> = (    ctx: RequestContext,    order: Order,    amount: number,    args: ConfigArgValues<T>,    metadata: PaymentMetadata,    method: PaymentMethod,) => CreatePaymentResult | CreatePaymentErrorResult | Promise<CreatePaymentResult | CreatePaymentErrorResult>

This function contains the logic for settling a payment. See PaymentMethodHandler for an example.

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type SettlePaymentFn<T extends ConfigArgs> = (    ctx: RequestContext,    order: Order,    payment: Payment,    args: ConfigArgValues<T>,    method: PaymentMethod,) => SettlePaymentResult | SettlePaymentErrorResult | Promise<SettlePaymentResult | SettlePaymentErrorResult>

This function contains the logic for cancelling a payment. See PaymentMethodHandler for an example.

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type CancelPaymentFn<T extends ConfigArgs> = (    ctx: RequestContext,    order: Order,    payment: Payment,    args: ConfigArgValues<T>,    method: PaymentMethod,) => CancelPaymentResult | CancelPaymentErrorResult | Promise<CancelPaymentResult | CancelPaymentErrorResult>

This function contains the logic for creating a refund. See PaymentMethodHandler for an example.

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type CreateRefundFn<T extends ConfigArgs> = (    ctx: RequestContext,    input: RefundOrderInput,    amount: number,    order: Order,    payment: Payment,    args: ConfigArgValues<T>,    method: PaymentMethod,) => CreateRefundResult | Promise<CreateRefundResult>
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Edited Feb 2, 2026·Edit this page