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client.go
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client.go
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package segcha
import (
"context"
"github.com/palantir/stacktrace"
"github.com/tnyim/jungletv/segcha/segchaproto"
"google.golang.org/grpc"
)
// NewClient returns a new client for making remote challenge generation calls
// The connection to `address` is not secured! It is assumed that it is protected externally (e.g. through an SSH tunnel)
func NewClient(ctx context.Context, address string) (segchaproto.SegchaClient, func() error, error) {
conn, err := grpc.DialContext(ctx, address, grpc.WithInsecure())
if err != nil {
return nil, nil, stacktrace.Propagate(err, "")
}
client := segchaproto.NewSegchaClient(conn)
return client, conn.Close, nil
}
// NewChallengeUsingClient requests the generation of a challenge using the provided client and returns it
func NewChallengeUsingClient(ctx context.Context, steps int, client segchaproto.SegchaClient) (*Challenge, error) {
response, err := client.GenerateChallenge(ctx, &segchaproto.GenerateChallengeRequest{
NumSteps: uint32(steps),
})
if err != nil {
return nil, stacktrace.Propagate(err, "")
}
answers := make([]int, len(response.Answers))
for i := range response.Answers {
answers[i] = int(response.Answers[i])
}
return &Challenge{
id: response.Id,
pics: response.Pictures,
answers: answers,
}, nil
}