sign
Signs a single authorization entry with the client domain's credentials.
This method is called by WebAuthForContracts when a client domain is specified and a signing delegate is provided (instead of a local keypair).
The implementation receives an unsigned authorization entry for the client domain and must return the same entry with a valid signature added.
Return
Base64-encoded com.soneso.stellar.sdk.xdr.SorobanAuthorizationEntryXdr XDR with the entry signed by the client domain's key
Parameters
entry
Base64-encoded com.soneso.stellar.sdk.xdr.SorobanAuthorizationEntryXdr XDR representing the unsigned authorization entry for the client domain
Throws
if signing fails (e.g., network error, invalid entry, key not found)