Signer Guides

Step-by-step guides that take you from initialization to a signed transaction for each chain. Read Request Basics first.

Structure

Prerequisites: firmware/SDK versions, required transport, device confirmation
Step flow: connect → choose account path → build request → confirm on device → verify result
Minimal runnable sample: event listeners, request params, result validation
FAQ: wrong path, reject/timeout, network or data issues

Environment & versions: latest firmware + aligned SDK/Bridge; pick the transport guide for your platform.
Paths: use chain-specific HD paths; double-check hardened vs non-hardened (see each signer page).
Session & wallet: include deviceId (BLE) and passphraseState if using hidden wallet.
UI: subscribe to UI_EVENT; handle PIN/passphrase prompts with uiResponse.
Verify result: always check success then validate the returned address/signature with chain libs.
Safety: reject on unexpected prompts, and fail fast if device is in Bootloader.

EVM Signer — paths, EIP-1559 vs Legacy params, device prompts, post-sign broadcast
BTC Signer — script/path matrix, refTx completeness, change/output review, serialization
Solana Signer — fixed hardened path, raw message/tx prep, signature assembly