/
server.go
91 lines (73 loc) · 2.58 KB
/
server.go
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package main
import (
"context"
"errors"
"log"
"net"
btckeys "github.com/Muggle-Du/btckeys/btckeys"
"google.golang.org/grpc"
)
const (
port = ":50051"
)
var (
ErrInvalidXpub = errors.New("not a valid xpub string")
ErrWantCompressedPubKeys = errors.New("want compressed public key strings")
)
// server is used to implement helloworld.GreeterServer.
type server struct {
btckeys.UnimplementedBtcKeysServer
}
func (s *server) DeriveBech32AddressFromXpub(ctx context.Context, in *btckeys.DerivationRequest) (*btckeys.Address, error) {
xpub := in.Xpub
path := in.Path
log.Printf("receive bech32 child wallet address request, xpub:%v, path:%v\n", xpub, path)
if string(xpub[:4]) == "xprv" {
log.Printf("refuse to serve because a xprv is uploaded and this can be dangerous\n")
return &btckeys.Address{Address: ""}, ErrInvalidXpub
}
exkey, err := btckeys.NewKeyFromString(xpub)
if err != nil {
log.Printf("invalid xpub string, error: %v\n", err)
return &btckeys.Address{Address: ""}, err
}
childExkey, err := exkey.Derive(path)
if err != nil {
log.Printf("failed to derive from parent extended key, error: %v\n", err)
return &btckeys.Address{Address: ""}, err
}
bech32Address, err := childExkey.P2WPKHAddress()
if err != nil {
log.Printf("failed to generate bech32address, error: %v\n", err)
}
return &btckeys.Address{Address: bech32Address}, nil
}
func (s *server) GetMultiSigAddress(ctx context.Context, in *btckeys.MultiSigRequest) (*btckeys.MultiSigResponse, error) {
publicKeyStrings := in.Pubkeys
/*for _, publicKeyString := range publicKeyStrings {
if btckeys.IsCompressedPublicKeyString(publicKeyString) {
log.Printf("want compressed public key")
return &btckeys.Address{Address: ""}, ErrWantCompressedPubKeys
}
}*/ // not necessary
log.Printf("receive multisig address generation request,m: %v, n: %v\n", in.M, in.N)
multiSigAddress, redeemScript, err := btckeys.GenerateMultiSigAddress(publicKeyStrings, int(in.M), int(in.N))
if err != nil {
log.Printf("failed to generate multisig address, error: %v\n", err)
return &btckeys.MultiSigResponse{Address: "", Redeemscript: ""}, err
}
//return both multisig address and the redeem script
return &btckeys.MultiSigResponse{Address: multiSigAddress, Redeemscript: redeemScript}, nil
}
func main() {
lis, err := net.Listen("tcp", port)
if err != nil {
log.Fatalf("failed to listen: %v\n", err)
}
s := grpc.NewServer()
btckeys.RegisterBtcKeysServer(s, &server{})
log.Printf("server listening at %v\n", lis.Addr())
if err := s.Serve(lis); err != nil {
log.Fatalf("failed to serve: %v\n", err)
}
}