V1Response

Every request method — info, getDeviceInfo, the Account API and sign() — resolves to this envelope (lifecycle setters return nothing, and the Bitcoin builder helpers and unitConverter return their own values) — except argument errors caught in the connector, which throw or reject (see Error Codes).

interface V1Response<T = Record<string, unknown>> {
  header: { version: string; status: 'success' | 'failure';
            request_from?: string; response_from?: string };
  body: {
    command?: string;
    parameter?: T;
    error?: { code: string; message: string };
  };
}

info

The bridge SDK speaks an internal JSON-RPC wire ({ id, result, error }) to the connector; the connector re-wraps it into this V1Response before returning to your app. You only ever see V1Response.

body.parameter per method

method / call	parameter
signTransaction	{ signature } — serialized signed tx; exact form per network (see the table below)
signMessage / signTypedData	{ signature }
signData	{ signature, key }
signAuthEntry	{ signedAuthEntry, signerAddress }
getAddress	{ address, … }
getAccountInfo	{ account: V2AccountInfo[] }
getDeviceInfo	{ deviceId, version, label, connectType, … }

signTransaction.signature per network

network	signature contents
EVM	RLP-encoded signed raw tx (eth_sendRawTransaction)
Bitcoin	signed raw tx hex
Solana	serialized signed (Versioned)Transaction, hex (no 0x)
Cosmos	<signature>.<pubkey>.<txRaw hex> — see Cosmos
XRP / Tron / …	that network's broadcast serialization
Cardano	that network's broadcast serialization — except the structured ordinary transfer, which is framed differently; see Cardano
Constellation	the bare DER secp256k1 signature (hex) over the transaction hash — rebuild the transaction and attach it as its proof — see Constellation
Filecoin	the bare secp256k1 signature (hex) — not a signed message; wrap it with the Lotus Message for MpoolPush — see Filecoin
HAVAH	the bare device signature (65 bytes, r‖s‖recovery id) as base64 — set it as the ICON transaction's signature field and call icx_sendTransaction — see HAVAH

• Error Codes
• sign()