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Ledger Live Integration refers to the set of APIs, SDKs, UI patterns, and recommended flows provided by the Ledger Developer Portal so external apps can interact with Ledger hardware wallets through the Ledger Live desktop/mobile bridge. Integrations enable secure transaction signing, account discovery, and user flows that keep private keys isolated on the device.
Developers building wallets, DeFi front-ends, custodial services, or integrations that require user signature via Ledger devices.
Sign up on the Ledger Developer Portal to access documentation, SDK downloads, and example projects. Some advanced endpoints or enterprise features may require an API key or partnership agreement—follow the portal steps to register your application and generate credentials.
Install Ledger Live and enable the developer mode or experimental features as required. Use the official JavaScript SDKs (or language bindings) for deterministic behavior while testing.
Typical integration flows include device pairing, account discovery, transaction construction, user confirmation, and broadcast. Design your integration to minimize friction: show clear instructions for device unlocking, firmware updates, and app selection on the ledger device.
Show progress states, explain required user actions (e.g., "Open the Bitcoin app"), and present canonical error messages so users can recover fast. Avoid re-requesting signatures for the same operation.
Ledger provides SDKs (notably JavaScript libraries) to simplify the communication with Ledger Live and the device. These libraries handle transport layers, serialization, and device-specific protocols (APDU).
Integrations often use USB, WebHID, Bluetooth (BLE), or the Ledger Live bridge. Abstract transport to allow plugging a mock transport in tests.
Lock SDK versions in production and monitor changelogs on the Developer Portal for breaking changes.
Never request private keys or seed phrases. Use the Ledger device to perform signing operations and only transmit unsigned transaction payloads. Validate the public key path and address on the device display before broadcasting.
Always validate amounts, recipients, and fees client-side and server-side. Protect against transaction replay and supply chain attacks by verifying signatures and using recognized signing formats.
Create transport mocks and test harnesses that simulate device prompts and user confirmations. Integrate tests into CI so upgrades to SDKs or libraries don't break production flows.
Test firmware update interruptions, device disconnects, app-not-open errors, and low-battery scenarios. Make sure retry logic is clear to the user and never silently retry sensitive operations.
Keep transaction construction deterministic and avoid adding nonces or TTLs that the user can't verify easily on-device.
Classify errors into transport, device-state, user-action, and application logic categories. Provide actionable suggestions: "Reconnect USB", "Open the Ethereum app", or "Update firmware".
Log transport-layer events in dev and staging (never in production with secrets). Capture timestamps, sdkVersion, deviceModel, and locale to help reproduce issues.
Before releasing integrations, ensure backward compatibility, comprehensive test coverage, clear onboarding flows, and user-facing help docs. Coordinate SDK upgrades with a canary release strategy.
Track key metrics: success rate of signer operations, average time to sign, and failure categories. Use these to prioritize bug fixes and UX improvements.
Use the Ledger Developer Portal for up-to-date docs, SDK repositories, example code, and developer support channels. Keep an eye on release notes and recommended migration guides for breaking changes.
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