CrossmintExportableWalletSigner

Flutter Abstract Interface Class

Abstract Interface Class

Marker interface for signers that can hand back the raw private key to the user — primarily non-custodial email and phone signers.

abstract interface class CrossmintExportableWalletSigner

Non-custodial signers normally keep keys inside a hidden WebView (the TEE/KMS runtime the Crossmint signer service manages). For recovery or migration flows, users can request the private key via a separate, purpose-built export bridge — that flow lives behind exportPrivateKey.

Properties

canExportPrivateKey

bool get canExportPrivateKey

Whether this signer can export its private key. Only non-custodial email/phone signers return true.

Methods

exportPrivateKey

Future<void> exportPrivateKey(CrossmintExportSignerBridge bridge)

Kicks off the key-export flow via the provided export bridge. The bridge renders a Crossmint-hosted UI that the user confirms inside. Throws CrossmintSignerException when the signer type does not support export.