error missing-impl
У сервиса нет impl.
What it means#
Every service that is not extern needs exactly one impl in the program: the contract alone serves nothing.
Example#
service Lonely { // <- missing-impl
rpc ping() -> i32
}error
missing-impl
How to fix#
Write impl Lonely { rpc ping() { 1 } }, or declare the service extern service if it is implemented elsewhere (it then only has clients).