Bogdan-Ștefan Neacşu
9ed013b418
* Add library to communicate with ledger * Update changelog * Install libudev-dev on linux
38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
// Copyright 2022 - Nym Technologies SA <contact@nymtech.net>
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// SPDX-License-Identifier: Apache-2.0
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use crate::error::{LedgerError, Result};
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use bip32::DerivationPath;
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use ledger_transport::{APDUAnswer, APDUErrorCode};
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pub(crate) fn answer_bytes(answer: &APDUAnswer<Vec<u8>>) -> Result<&[u8]> {
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let error_code = answer
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.error_code()
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.map_err(|err_code| LedgerError::UnknownErrorCode { err_code })?;
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match error_code {
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APDUErrorCode::NoError => Ok(answer.data()),
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e => Err(LedgerError::APDU {
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reason: e.description(),
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}),
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}
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}
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pub(crate) fn path_bytes(path: DerivationPath) -> Result<[[u8; 4]; 5]> {
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let received = path.len();
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let components: Vec<[u8; 4]> = path.into_iter().map(|c| c.0.to_le_bytes()).collect();
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if components.len() != 5 {
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Err(LedgerError::InvalidDerivationPath {
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expected: 5,
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received,
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})
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} else {
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Ok([
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components[0],
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components[1],
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components[2],
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components[3],
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components[4],
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])
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}
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}
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