Now that the source is available I thought I'd bring up the subject of the seed difference between the Trezor and Simplewallet. The Trezor uses 24 words, while Simplewallet uses 24 plus an extra word as a checksum. How compatible are these two seeds? And what needs to be done to convert a simplewallet seed to a Trezor so that people don't need to "sweep" funds to a brand new seed, as well as doing the reverse?
In the experimental binaries, which can be found here, NoodleDoodle included a tool called
trezorctl. With this tool you can convert your Trezor mnemonic seed to a mnemonic seed compatible with simplewallet. Thus, using this tool allows you to, after conversion, restore your wallet using simplewallet. The tool works as follows. Note that
<word_list> is your 24 word Trezor mnemonic seed. On Linux and Mac OS:
./trezorctl recover_mnemonic <index> <passphrase> <language> <word_list>
On Windows make sure to launch it from the command line. Go to the folder monero-cli-wallet is located and make sure your cursor isn't located on any of the files. Subsequently do SHIFT + right click and it will give you an option to "Open command window here". Lastly, type the following command:
trezorctl.exe recover_mnemonic <index> <passphrase> <language> <word_list>
The default language is English for seeds. Note that simplewallet also supports Spanish, German, Italian, Japanese, Russian, and Portugese. Lastly, the trezorctrl output looks like this:
USAGE: trezorctl recover_mnemonic index passphrase language word_list Supported languages: English Spanish German Italian Portuguese Russian Japanese
I've never owned Trezor so my answer might be irrelevant, but I've studied the code to learn how the Electrum seed phrase is treated in the simplewallet so that I can create my own specific choice of seed phrase.
From lines 216-221 of electrum-words.cpp, with
seed_length being set constant to 24, I guess the number of words in the phrase can be either 12, 24, or 25. Line 224 suggests that the 25th word if existent would be treated as a checksum.
So, if Trezor gives you 24 words, I guess you can just put those 24 words (i.e. with no checksum) into simplewallet to restore your wallet. Hope this works.