> ## Documentation Index > Fetch the complete documentation index at: https://docs.turnkey.com/llms.txt > Use this file to discover all available pages before exploring further. # Sign Frost Spark > Perform pure FROST partial signing for a Spark wallet. Produces partial signatures without constructing operator packages. export const EndpointPath = ({type, path}) => { return

POST

public

{type}

{path}

; }; export const NestedParam = ({parentKey, childKey, type, required, description, children}) => { const fullKey = `${parentKey}.${childKey}`; const anchorId = `body-${fullKey.replace(/\./g, '-')}`; return

{parentKey}. {childKey}

{type}

{required && required }

{children &&

{children}

}

; }; export const H3Bordered = ({text}) =>

{text}

; export const Authorizations = () => { return

Cryptographically signed (stamped) request to be passed in as a header. For more info, see here.

; }; Enum options: `ACTIVITY_TYPE_SPARK_SIGN_FROST` Timestamp (in milliseconds) of the request, used to verify liveness of user requests. Unique identifier for a given Organization.

The parameters object containing the specific intent data for this activity.

A Spark wallet account address identifying the wallet to sign with.

Batched sign requests. Each produces a partial signature plus Turnkey's public commitments.

derivation field

identity field

signingLeaf field

Unique identifier for the Spark signing leaf. deposit field

staticDeposit field

Index used to derive the static deposit key. htlcPreimage field Hex-encoded 32-byte sighash to sign. Aggregate group verifying key (hex-encoded compressed secp256k1 point), computed as P\_ops + P\_user. Bound into the nonce HMAC.

Commitments for every non-Turnkey participant. MUST NOT include an entry under Turnkey's identifier. Bound into the nonce HMAC.

FROST participant identifier, hex-encoded (32-byte scalar). Hiding commitment D, hex-encoded compressed secp256k1 point. Binding commitment E, hex-encoded compressed secp256k1 point. Optional adaptor point T (hex-encoded 33-byte compressed secp256k1 pubkey). When set, Turnkey produces a Schnorr adaptor pre-signature with the FROST challenge bound to `R+T` (where `R` is the aggregate group nonce commitment from FROST). The party holding the discrete log `t` completes the pre-sig to a valid BIP-340 signature by adding `t` (or `-t`, for parity) to the signature scalar `s`. This is primarily used by Spark leaves-swap and other adaptor-bound flows; absent or empty leads to plain FROST signing (the typical case). A successful response returns the following fields: The activity object containing type, intent, and result Unique identifier for a given Activity object. Unique identifier for a given Organization. The activity status The activity type The intent of the activity The sparkSignFrostIntent object A Spark wallet account address identifying the wallet to sign with. Batched sign requests. Each produces a partial signature plus Turnkey's public commitments. derivation field identity field signingLeaf field Unique identifier for the Spark signing leaf. deposit field staticDeposit field Index used to derive the static deposit key. htlcPreimage field Hex-encoded 32-byte sighash to sign. Aggregate group verifying key (hex-encoded compressed secp256k1 point), computed as P\_ops + P\_user. Bound into the nonce HMAC. Commitments for every non-Turnkey participant. MUST NOT include an entry under Turnkey's identifier. Bound into the nonce HMAC. FROST participant identifier, hex-encoded (32-byte scalar). Hiding commitment D, hex-encoded compressed secp256k1 point. Binding commitment E, hex-encoded compressed secp256k1 point. Optional adaptor point T (hex-encoded 33-byte compressed secp256k1 pubkey). When set, Turnkey produces a Schnorr adaptor pre-signature with the FROST challenge bound to `R+T` (where `R` is the aggregate group nonce commitment from FROST). The party holding the discrete log `t` completes the pre-sig to a valid BIP-340 signature by adding `t` (or `-t`, for parity) to the signature scalar `s`. This is primarily used by Spark leaves-swap and other adaptor-bound flows; absent or empty leads to plain FROST signing (the typical case). The result of the activity The sparkSignFrostResult object Partial signatures plus Turnkey commitments, one per request, in order. Hex-encoded FROST partial signature. Turnkey's hiding commitment D (hex-encoded compressed secp256k1 point). Forward to the Spark Operator. Turnkey's binding commitment E (hex-encoded compressed secp256k1 point). Forward to the Spark Operator. A list of objects representing a particular User's approval or rejection of a Consensus request, including all relevant metadata. An artifact verifying a User's action. Whether the activity can be approved. Whether the activity can be rejected. The creation timestamp. The last update timestamp. ```bash title="cURL" theme={"system"} curl --request POST \ --url https://api.turnkey.com/public/v1/submit/spark_sign_frost \ --header 'Accept: application/json' \ --header 'Content-Type: application/json' \ --header "X-Stamp: (see Authorizations)" \ --data '{ "type": "ACTIVITY_TYPE_SPARK_SIGN_FROST", "timestampMs": " (e.g. 1746736509954)", "organizationId": " (Your Organization ID)", "parameters": { "signWith": "", "signatures": [ { "derivation": { "identity": "