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trezor-firmware/rust/trezor-client/scripts/build_messages

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#!/usr/bin/env python3
# Generates the `trezor_message_impl!` macro calls for the `src/messages/mod.rs` file.
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from os import path
# Path to the `messages.proto` file
PATH = path.abspath(path.join(__file__, "../../../../common/protob/messages.proto"))
# Prefix of the enum variants
PREFIX = "MessageType_"
# Mapping of block name to feature name
FEATURES = {
# no features
"Management": "default",
"Bootloader": "default",
"Crypto": "default",
"Debug": "default",
#
"Bitcoin": "bitcoin",
"Ethereum": "ethereum",
#
"Binance": "binance",
"Cardano": "cardano",
"EOS": "eos",
"Monero": "monero",
"NEM": "nem",
"Ripple": "ripple",
"Solana": "solana",
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"Stellar": "stellar",
"Tezos": "tezos",
"WebAuthn": "webauthn",
}
MACRO = "trezor_message_impl"
INDENT = " "
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def main():
blocks = get_blocks()
features = {}
defaults = []
for block, variants in blocks.items():
f = FEATURES.get(block)
if not f or f == "default":
defaults.extend(variants)
else:
vs = features.get(f)
if vs:
vs.extend(variants)
else:
features[f] = variants
items = list(features.items())
items.sort()
out = write_block(defaults)
for feature, variants in items:
if variants and feature:
out += "\n"
out += write_block(variants, feature)
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print(out.strip())
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# Parse feature blocks based on comments in the `messages.proto` file
def get_blocks() -> dict[str, list[str]]:
blocks = {}
current_block = ""
with open(PATH, "r") as file:
in_enum = False
in_block_comment = False
for line in file:
line = line.strip()
if "/*" in line:
in_block_comment = True
if "*/" in line:
in_block_comment = False
if in_block_comment:
continue
if line.startswith("enum MessageType {"):
in_enum = True
continue
if in_enum:
if line == "}":
break
if line.startswith("//"):
comment = line.removeprefix("//").strip()
if comment[0].isupper() and len(comment.split(" ")) == 1:
current_block = comment
blocks[current_block] = []
elif line.startswith(PREFIX):
blocks[current_block].append(line.split(" ")[0])
return blocks
# Writes a macro block
def write_block(variants: list[str], feature: str = "") -> str:
s = ""
if feature:
s += f'#[cfg(feature = "{feature}")]\n'
s += f"{MACRO}! {{\n"
for variant in variants:
s += f"{INDENT}{variant.removeprefix(PREFIX)} => {variant},\n"
s += "}\n"
return s
if __name__ == "__main__":
main()