Update README.md

Author: xtruan

README.md

@@ -1,2 +1,29 @@
 # FlipBIP - BIP39 Tool
-BIP39 Mnemonic Generator for Flipper Zero
+Crypto toolkit for Flipper Zero
+
+## Background
+
+The goal of this project is to see how much crypto functionality can be brought to the Flipper Zero.
+
+## Status
+
+### Complete
+
+- Trezor crypto C code ported into `crypto` subfolder
+  - Adapted to use Flipper hardware RNG (see `crypto/rand.c`)
+  - Imports and some C library functions modified for compatibility with FBT
+- Basic navigation and UI adapted from FAP Boilerplate app
+- BIP39 mnemonic generation supported!
+  - 24, 18, or 12 words
+
+### Work in Progress
+
+- WIP: BIP39 mnemonic to seed generation
+  - `seed` seems to be blank using `mnemonic_to_seed` func
+- WIP: BIP39 to BIP32 HDNode
+  - possible memory issue
+
+### (Far) Future
+
+- Airgapped wallet functionality
+- USB/Bluetooth wallet functionality