[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [mapWire](./x-components.mapwire.md) ## mapWire() function Creates a [Wire](./x-components.wire.md) from other `toWire` wire. It uses `mapFn` to transform the `FromPayload` received to `ToPayload` which `toWire` requires. This is useful to reuse wires in different Events where the payload doesn't fit exactly. **Signature:** ```typescript export declare function mapWire(toWire: Wire, mapFn: (payload: FromPayload) => ToPayload): Wire; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | toWire | [Wire](./x-components.wire.md)<ToPayload> | The wire which the new Wire is created from. | | mapFn | (payload: FromPayload) => ToPayload | Function to map the payload from FromPayload to ToPayload. | **Returns:** [Wire](./x-components.wire.md)<FromPayload> A new [Wire](./x-components.wire.md).