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Roman Zeyde

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@romanz on GitHub ↗
581 commits2 monitored projects181 candidates2 high-risk analyses
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Trezor firmwareTrezor576 commits180 candidates2 high riskElectrumElectrum5 commits1 candidates0 high risk
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Low 27 AI analysisMessage 93 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): digest EIP-1559/EIP-7702 magic without RLP encoding

This commit is a small internal cleanup in Trezor's Ethereum signing code. It changes how two special 'magic' bytes (the transaction type markers for newer Ethereum transaction formats) are fed into the cryptographic hash. Previously the c…

Refactor of cryptographic hashing path for Ethereum transaction signingRemoval of implicit assumption that RLP encodes small integers as single bytesChange affects EIP-1559 and EIP-7702 transaction type markers
2362bc6fby Roman Zeyde+6−32 files
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Informational 15 AI analysisMessage 98 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

test(core): test RLP self-encoding bytestrings

This commit only adds a new unit test to the Trezor firmware codebase. It verifies that very short Ethereum RLP-encoded byte strings and small positive integers encode to themselves, which is a known property of the RLP specification. No p…

41538733by Roman Zeyde+16−01 file
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Moderate 60 AI analysisMessage 100 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(core/ethereum): verify `chain_id` when matching EIP-7702 addresses

This commit tightens security for a new Ethereum feature (EIP-7702 account delegation) in Trezor hardware wallets. Previously, the wallet would recognize certain smart-contract delegate addresses on any chain, and would allow signing on un…

authorization bypass hardening: chain-scoped allowlist for EIP-7702 delegate addressesunknown-chain rejection: previously allowed signing on UNKNOWN_NETWORK with generic prompt, now raises DataErrortest inversion: metamask_nonce_1_chainid_200901_unknown changed from success fixture to error fixture
afd4279cby Roman Zeyde+133−916 files
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Moderate 60 AI analysisMessage 90 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(core/ethereum): disallow EIP-7702 authorization with `chain_id = 0`

This commit removes a feature in Trezor's Ethereum signing code that allowed users to sign EIP-7702 authorization messages with chain_id set to 0, which previously made the signature valid on all EVM networks. The change now rejects chain_…

Cross-chain replay risk reduction for EIP-7702 authorizationsRemoval of 'chain_id 0 means all chains' special caseInput validation hardening in Ethereum signing path
4c855c15by Roman Zeyde+118−1245 files
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Informational 12 AI analysisMessage 85 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core/ethereum): simplify `sign_tx()` digest flow

This commit is a straightforward internal code cleanup in the Ethereum transaction signing module. It moves existing digest-calculation logic into two new helper functions, _start_digest() and _finish_digest(), without changing what data i…

No security-relevant keywords in commit title or messageNo changelog entry ([no changelog])Pure refactor: identical hash input ordering and RLP length computation
e07499daby Roman Zeyde+35−231 file
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Informational 12 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core/ethereum): simplify `sign_auth_eip7702()` digest flow

This commit is a small code cleanup in the Ethereum signing module for Trezor hardware wallets. It replaces a manual, step-by-step RLP (a data-encoding format used by Ethereum) header-and-field writing process with a single helper call tha…

766216d2by Roman Zeyde+2−111 file
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Informational 12 AI analysisMessage 85 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core/ethereum): simplify `sign_tx_eip1559()` digest flow

This commit is a code cleanup (refactor) for how Trezor's Ethereum app builds the transaction hash for EIP-1559 transactions. It moves the existing hashing steps into two helper functions and removes a duplicated list of transaction fields…

3d2b70cfby Roman Zeyde+35−381 file
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Informational 15 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

chore(core): update common changelog as well

This commit only updates the changelog text in core/CHANGELOG.md. It adds a one-line note describing a security fix ('Discard low-order keys in THP Code Entry pairing') that was already merged in a previous pull request. There are no code …

8c04a8fbby Roman Zeyde+1−01 file
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Informational 12 AI analysisMessage 93 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

refactor(core): simplify ETH access list RLP encoding

This commit is a small internal cleanup of how Ethereum transaction 'access lists' are formatted for RLP encoding in the Trezor firmware. It replaces a hand-rolled length calculation and manual header writing with higher-level helper funct…

2d23449fby Roman Zeyde+6−161 file
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Informational 15 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

chore(core): add trailing colon for Bolt/Caesar EIP-7702 info items

This is a cosmetic user-interface change for the Trezor hardware wallet. It adds a trailing colon to labels shown when a user is reviewing Ethereum EIP-7702 authorization or revoke actions. There is no security impact: no code logic, crypt…

243a9d21by Roman Zeyde+218−2003 files
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Informational 15 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(core/monero): correct progress text

This is a one-character typo fix in a Monero progress message. A missing backslash meant the text 'hashing inputs' and the progress counter were joined on the same line instead of appearing on separate lines. It has no security relevance.

fd6d21b2by Roman Zeyde+1−11 file
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Informational 15 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(core/bootloader): correct "Change FW vendor" title

This commit changes a single on-screen label in the Trezor bootloader from lowercase 'Change fw vendor' to uppercase 'Change FW vendor'. It is purely a cosmetic wording fix with no security relevance.

5f756282by Roman Zeyde+1−11 file
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Low 47 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

chore(core/ethereum): reject invalid initial chunk

This commit fixes a validation bug in Trezor's Ethereum transaction signing. Previously, the device only checked whether the initial data chunk was too large when the transaction also contained non-zero data length. Now it always rejects a…

Input validation bypass fixedDefensive length check broadenedTest coverage added for zero-data-length case
b5e27a2dby Roman Zeyde+28−252 files
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Informational 15 AI analysisMessage 80 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

docs(core): add a changelog entry for #7388

This commit only adds a one-line changelog note saying a host-disconnection handling bug was fixed for the T3W1 device. There is no actual code change in the commit, so it cannot by itself introduce or fix a security issue. It merely docum…

d483d11fby Roman Zeyde+1−01 file
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Informational 15 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

ci(core): improve binaries' size formatting

This is a purely cosmetic change to how firmware binary file sizes are displayed in GitHub CI build summaries. It swaps the order of columns (size first, filename second) and adjusts alignment/sorting so the output is easier to read. There…

7fccc2c2by Roman Zeyde+1−11 file
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Low 35 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(core): confirm ERC-8213 calldata digest if all data is shown

This commit adds a new user-facing safety feature for Trezor hardware wallets when signing Ethereum transactions. If the user chooses to view all the raw transaction data (calldata), the device will now also show a final cryptographic hash…

Adds user-verifiable calldata digest display (ERC-8213) to mitigate tampering of long Ethereum transaction dataHashes calldata with keccak256 seeded by total length, matching the ERC-8213 specification referenced in code commentsAdds a length-consistency check (confirmed_len == total_len) before displaying the digest
10c82eddby Roman Zeyde+194−3222 files
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Informational 15 AI analysisMessage 87 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

test(core/ethereum): don't duplicate "skip_models" for EIP-7702 tests

This commit only changes a test data file. It removes duplicate 'skip_models' entries from Ethereum EIP-7702 test fixtures so that the T2T1 model is no longer excluded from these tests. There is no change to firmware code, no security fix,…

1f20560eby Roman Zeyde+0−81 file
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Low 36 AI analysisMessage 98 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(core): support EIP-7702 authorization/revocation

This commit adds support for signing Ethereum EIP-7702 authorizations and revocations on Trezor hardware wallets. EIP-7702 lets an Ethereum account temporarily delegate control to a smart contract. The code adds a new signing workflow, use…

New cryptographic signing path for EIP-7702 authorization tuplesHard-coded delegate allowlist restricts authorization to known contractsStrict safety checks block authorization but allow revocation
0cd72f03by Roman Zeyde+1130−015 files
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Informational 15 AI analysisMessage 93 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

docs(core): update EIP-7702 changelog entry

This commit only edits changelog text. It adds a more precise description of an already-released Ethereum feature (EIP-7702 support) and removes an older, less accurate changelog line. No code, transaction logic, or cryptographic behavior …

d12287b5by Roman Zeyde+1−12 files
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