// Package verify is the signature verification worker domain. It owns no
// state: it receives a public key, message hash and signature, and answers
// with a boolean. Several of these domains form the relay's verification pool.
package verify

import (
	"git.smesh.lol/torly/pkg/crypto/secp256k1"
	tinyspawn "git.smesh.lol/torly/pkg/tinyspawn"
	"git.smesh.lol/torly/pkg/wire"
)

// Chans are the channels bound at spawn.
type Chans struct {
	Req   tinyspawn.Duplex[wire.VerifyRequest]
	Resp  tinyspawn.Duplex[wire.VerifyResponse]
	Ready chan<- wire.Ready
	Stop  tinyspawn.Breaker
}

// Run is the domain entry point.
func Run(_ struct{}, ch Chans) {
	ch.Ready <- wire.Ready{OK: true}
	for {
		select {
		case req := <-ch.Req.Recv():
			ok := secp256k1.Verify(req.Pub, req.Msg, req.Sig)
			select {
			case ch.Resp.Tx <- wire.VerifyResponse{ID: req.ID, OK: ok}:
			case <-ch.Stop.Done():
				return
			}
		case <-ch.Stop.Done():
			return
		}
	}
}