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<MoonPayBuyFrame> is a headless component (renders nothing visible) that drives the buy pipeline. It is the declarative alternative to client.setupBuy(). Use this component when you want to drive the buy flow without a visible frame — for example, to present your own UI while the transaction processes in the background, then show <MoonPayChallenge> only if a challenge step is required. The quote prop is reactive: updating it pushes the new signature directly into the live frame without a remount.
BuyFlow.tsx
import React from "react";
import {
  MoonPayBuyFrame,
  MoonPayChallenge,
  type BuyEvent,
} from "@moonpay/platform-sdk-react-native";

export function BuyFlow({ quoteSignature }: { quoteSignature: string }) {
  const [challengeUrl, setChallengeUrl] = React.useState<string | null>(null);

  const handleEvent = (event: BuyEvent) => {
    switch (event.kind) {
      case "ready":
        break;
      case "complete":
        console.log(event.payload.transaction);
        break;
      case "challenge":
        setChallengeUrl(event.payload.url);
        break;
      case "error":
        console.error(event.payload.code, event.payload.message);
        break;
    }
  };

  return (
    <>
      <MoonPayBuyFrame quote={quoteSignature} onEvent={handleEvent} />
      {challengeUrl && (
        <MoonPayChallenge
          url={challengeUrl}
          onEvent={(e) => {
            if (e.kind === "complete" || e.kind === "cancelled") {
              setChallengeUrl(null);
            }
          }}
        />
      )}
    </>
  );
}

​
Props

PropTypeRequiredDescription
quotestring✅Quote signature from getQuote(). Reactive — updating this prop pushes the new signature into the frame without a remount.
externalTransactionIdstringPartner-assigned identifier for this transaction attempt. Mount-time only.
onEvent(event: BuyEvent) => voidCallback for buy frame lifecycle events. See BuyEvent.
This component renders nothing visible (0×0). It has no style prop.

​
BuyEvent

kindPayloadWhen you receive it
"ready"—The buy frame is ready.
"complete"{ transaction: FrameTransaction }The purchase finished. Inspect FrameTransaction for the outcome.
"challenge"{ kind: "frame"; url: string }Verification required. Render <MoonPayChallenge> with the provided URL.
"error"{ code: string; message: string }The flow encountered an error.