ark/client/client.go

package main

import (
	"fmt"
	"strings"

	arkv1 "github.com/ark-network/ark/api-spec/protobuf/gen/ark/v1"
	"github.com/urfave/cli/v2"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
	"google.golang.org/grpc/credentials/insecure"
)

type vtxo struct {
	amount   uint64
	txid     string
	vout     uint32
	poolTxid string
}

func getVtxos(
	ctx *cli.Context, client arkv1.ArkServiceClient, addr string,
) ([]vtxo, error) {
	response, err := client.ListVtxos(ctx.Context, &arkv1.ListVtxosRequest{
		Address: addr,
	})
	if err != nil {
		return nil, err
	}

	vtxos := make([]vtxo, 0, len(response.Vtxos))
	for _, v := range response.Vtxos {
		vtxos = append(vtxos, vtxo{
			amount:   v.Receiver.Amount,
			txid:     v.Outpoint.Txid,
			vout:     v.Outpoint.Vout,
			poolTxid: v.PoolTxid,
		})
	}

	return vtxos, nil
}

func getClientFromState(ctx *cli.Context) (arkv1.ArkServiceClient, func(), error) {
	state, err := getState()
	if err != nil {
		return nil, nil, err
	}
	addr, ok := state["ark_url"]
	if !ok {
		return nil, nil, fmt.Errorf("missing ark_url")
	}
	return getClient(ctx, addr)
}

func getClient(ctx *cli.Context, addr string) (arkv1.ArkServiceClient, func(), error) {
	creds := insecure.NewCredentials()
	port := 80
	if strings.HasPrefix(addr, "https://") {
		addr = strings.TrimPrefix(addr, "https://")
		creds = credentials.NewTLS(nil)
		port = 443
	}
	if !strings.Contains(addr, ":") {
		addr = fmt.Sprintf("%s:%d", addr, port)
	}
	conn, err := grpc.Dial(addr, grpc.WithTransportCredentials(creds))
	if err != nil {
		return nil, nil, err
	}

	client := arkv1.NewArkServiceClient(conn)

	closeFn := func() {
		err := conn.Close()
		if err != nil {
			fmt.Printf("error closing connection: %s\n", err)
		}
	}

	return client, closeFn, nil
}