Function buildShareRequestForParticipant

buildShareRequestForParticipant(
    sender: XIDDocument,
    _groupId: ARID,
    sessionId: ARID,
    responseArid: ARID,
    commitments: Map<string, unknown>,
): SealedRequest
Build a sign share request for a participant.

Port of build_sign_share_request() from cmd/sign/coordinator/round1.rs.
Parameters
- sender: XIDDocument
- _groupId: ARID
- sessionId: ARID
- responseArid: ARID
- commitments: Map<string, unknown>
Returns SealedRequest
- Defined in cmd/sign/coordinator/round1.ts:309