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74 lines
2.7 KiB
Markdown
74 lines
2.7 KiB
Markdown
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# Trezor hardware wallet support
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This module adds [Trezor] hardware support to Monero.
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## Basic information
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Trezor integration is based on the following original proposal: https://github.com/ph4r05/monero-trezor-doc
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A custom high-level transaction signing protocol uses Trezor in a similar way a cold wallet is used.
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Transaction is build incrementally on the device.
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Trezor implements the signing protocol in [trezor-firmware] repository, in the [monero](https://github.com/trezor/trezor-firmware/tree/master/core/src/apps/monero) application.
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Please, refer to [monero readme](https://github.com/trezor/trezor-firmware/blob/master/core/src/apps/monero/README.md) for more information.
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## Dependencies
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Trezor uses [Protobuf](https://protobuf.dev/) library. As Monero is compiled with C++14, the newest Protobuf library version cannot be compiled because it requires C++17 (through its dependency Abseil library).
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This can result in a compilation failure.
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Protobuf v21 is the latest compatible protobuf version.
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If you want to compile Monero with Trezor support, please make sure the Protobuf v21 is installed.
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More about this limitation: [PR #8752](https://github.com/monero-project/monero/pull/8752),
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[1](https://github.com/monero-project/monero/pull/8752#discussion_r1246174755), [2](https://github.com/monero-project/monero/pull/8752#discussion_r1246480393)
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### OSX
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To build with installed, but not linked protobuf:
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```bash
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CMAKE_PREFIX_PATH=$(find /opt/homebrew/Cellar/protobuf@21 -maxdepth 1 -type d -name "21.*" -print -quit) \
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make release
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```
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or to install and link as a default protobuf version:
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```bash
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# Either install all requirements as
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brew update && brew bundle --file=contrib/brew/Brewfile
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# or install protobufv21 specifically
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brew install protobuf@21 && brew link protobuf@21
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```
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### MSYS32
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```bash
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curl -O https://repo.msys2.org/mingw/mingw64/mingw-w64-x86_64-protobuf-c-1.4.1-1-any.pkg.tar.zst
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curl -O https://repo.msys2.org/mingw/mingw64/mingw-w64-x86_64-protobuf-21.9-1-any.pkg.tar.zst
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pacman --noconfirm -U mingw-w64-x86_64-protobuf-c-1.4.1-1-any.pkg.tar.zst mingw-w64-x86_64-protobuf-21.9-1-any.pkg.tar.zst
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```
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### Other systems
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- install protobufv21
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- point `CMAKE_PREFIX_PATH` environment variable to Protobuf v21 installation.
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## Troubleshooting
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To disable Trezor support, set `USE_DEVICE_TREZOR=OFF`, e.g.:
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```shell
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USE_DEVICE_TREZOR=OFF make release
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```
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## Resources:
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- First pull request https://github.com/monero-project/monero/pull/4241
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- Integration proposal https://github.com/ph4r05/monero-trezor-doc
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- Integration readme in trezor-firmware https://github.com/trezor/trezor-firmware/blob/master/core/src/apps/monero/README.md
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[Trezor]: https://trezor.io/
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[trezor-firmware]: https://github.com/trezor/trezor-firmware/
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