Sep45NoEndpointException

Exception thrown when the domain's stellar.toml is missing the WEB_AUTH_FOR_CONTRACTS_ENDPOINT.

SEP-45 requires the server's stellar.toml to contain a WEB_AUTH_FOR_CONTRACTS_ENDPOINT field that specifies the URL for contract authentication. This endpoint is different from SEP-10's WEB_AUTH_ENDPOINT which handles traditional account authentication.

To resolve this error:

1. Verify the domain supports SEP-45 contract authentication

2. Check the stellar.toml at https://{domain}/.well-known/stellar.toml

3. Look for WEB_AUTH_FOR_CONTRACTS_ENDPOINT field

4. Contact the service provider if the endpoint should be available

Note: SEP-45 support is optional. Many services only implement SEP-10 for traditional accounts. If you need to authenticate a contract account (C...), you must use a service that explicitly supports SEP-45.

Example - Handle missing endpoint:

try {
    val webAuth = WebAuthForContracts.fromDomain("example.com", Network.PUBLIC)
} catch (e: Sep45NoEndpointException) {
    println("Domain ${e.domain} does not support SEP-45 contract authentication")
    // Fall back to alternative authentication or inform user
}