crossmint_device_signer 0.2.0

Native device-signer plugin for the Crossmint Flutter SDK — hardware-backed key generation and signing via Secure Enclave (iOS) and Android Keystore.

0.2.0

• Breaking (native): the iOS deployment target is raised from 13 to 15, and the plugin now declares a required CrossmintDeviceSigner (~> 0.11) CocoaPods dependency. The Dart public API is unchanged.
• Native plugins consolidated: the Android (Kotlin) and iOS (Swift) implementations were rewritten to delegate to the shared CrossmintDeviceSigner native packages — the same native code the React Native SDK depends on — for cross-SDK parity.
• Native review fixes: Android key operations run off the main thread and hasKey discovery was corrected; iOS adds keychain existence checks and a signer index namespace.
• Example app bumped to iOS 15 for the shared pod.

0.1.1

• Fixed signature encoding on both native platforms. signMessage was returning ECDSA r/s as hex strings (Android via BigInteger.toString(16) + 0x prefix; iOS via a Data.hexPrefixed() extension). The Crossmint wallets API parses those fields as non-negative decimal BigInt strings and rejects hex with HTTP 400. Android now uses BigInteger.toString() (radix 10, no prefix); iOS uses a new Data.bigEndianDecimalString() extension that performs base-256 → base-10 long multiplication (Swift has no native BigInt). Part of the end-to-end device-signer fix tracked under #23 / #31 — the software-side changes (base64 message decoding, low-S canonicalisation, matching decimal output) ship in crossmint_flutter@0.1.1; the plugin's message handling was already correct (Base64.decode on Android, decodeBase64 on iOS), so this package only needed the encoding change.

0.1.0

• First public release on pub.dev

0.0.1

• Initial release of the native device-signer plugin
• Added Secure Enclave (iOS) and Android Keystore key generation and storage
• Added message signing with hardware-backed P-256 keys
• Added key lifecycle management: generate, map to wallet address, look up, and delete
• Added device name lookup for signer identification