Add support for promises

[marcus-sa]

Promise support is a must have and is definitely preferred over callbacks.

[brendandburns]

@marcus-sa This code is generated by the gRPC code generator. Please see the issue here:

grpc/grpc-node#54

Discussing why they still use callbacks.

I'm going to investigate grpc-helper and see if we can use that.

Failing at that, hand-written code to help with this is also ok...

[XavierGeerinck]

@marcus-sa This code is generated by the gRPC code generator. Please see the issue here:

grpc/grpc-node#54

Discussing why they still use callbacks.

I'm going to investigate grpc-helper and see if we can use that.

Failing at that, hand-written code to help with this is also ok...

Was looking at the same thing for promises, apparently there is a bug that has to get resolved first (PR is open at: https://github.com/xizhibei/grpc-helper/pull/9/files#diff-3cafb86a5b0a9d0916a7fed543a1fb53)

[XavierGeerinck]

Promises have been added in the entire library now, so closing this.