feat: add DMK error tag mappings and resolver#597
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Add DMK_ERROR_TAG_MAPPINGS, DMK_MESSAGE_PATTERNS, and getDMKErrorFromTag() to support parsing Ledger Device Management Kit (DMK) errors by their non-standard _tag property. These will be consumed by MetaMask Mobile to replace locally-defined DMK mappings in app/core/HardwareWallet/errors/.
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mathieuartu
approved these changes
Jul 16, 2026
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This PR adds new dmk related errors to the @hw-wallet-sdk and used in the ledger keyring.
Examples
Note
Medium Risk
Error handling on the Ledger DMK path changes for connection/session failures, which affects what users see and how callers branch on error codes; coverage is broad but misclassification could still slip through for unmapped tags.
Overview
Ledger Device Management Kit failures that expose a
_tag(e.g.DeviceSessionNotFound,DeviceLockedError) can now be turned into sharedHardwareWalletErrortypes instead of generic APDU/TransportStatusErrorwrappers.@metamask/hw-wallet-sdkaddsDMK_ERROR_MAPPINGS(fullErrorMapping+ user messages), derivedDMK_ERROR_TAG_MAPPINGS, message fallback patternsDMK_MESSAGE_PATTERNS, andgetDmkErrorFromTag, all re-exported from the package entry.keyring-eth-ledger-bridgeaddscreateDmkErrorand wires tag resolution intotranslateDmkError(_tagfirst, then hexDeviceExchangeError, then0x6f00fallback) andLedgerDmkBridge.#toErrorsosendCommand/ device-action failures get the right codes. The bridge depends on@metamask/hw-wallet-sdk^0.11.0. Bridge tests calldestroy()inafterEachto avoid flaky session-retry timers.Reviewed by Cursor Bugbot for commit 89c00ee. Bugbot is set up for automated code reviews on this repo. Configure here.