stellar-sdk/com.soneso.stellar.sdk.smartaccount.oz/OZExternalEd25519SignerAdapter

OZExternalEd25519SignerAdapter

interface OZExternalEd25519SignerAdapter

Adapter for out-of-process Ed25519 signing sources.

Implement this interface to plug in a hardware wallet, remote signing service, or any other signing backend into the multi-signer pipeline. The manager consults the adapter before falling back to its in-memory keypair registry (adapter-first precedence rule).

Example:

class MyHardwareAdapter : OZExternalEd25519SignerAdapter {
    override fun canSignFor(verifierAddress: String, publicKey: ByteArray): Boolean =
        hardwareWallet.hasSigner(publicKey)

    override suspend fun signAuthDigest(authDigest: ByteArray, publicKey: ByteArray): ByteArray =
        hardwareWallet.sign(authDigest, publicKey)
}

val manager = OZExternalSignerManager(
    networkPassphrase = "...",
    ed25519Adapter = MyHardwareAdapter()
)

Functions

canSignFor

abstract fun canSignFor(verifierAddress: String, publicKey: ByteArray): Boolean

Returns whether this adapter can produce an Ed25519 signature for the given verifier-contract address and public-key pair.

signAuthDigest

abstract suspend fun signAuthDigest(authDigest: ByteArray, publicKey: ByteArray): ByteArray

Produces a 64-byte Ed25519 signature over authDigest.