You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: reg.go
    path of file: ./repos/client/go/stellar/airdrop
    
    the code of the file until where you have to start completion: package stellar

import (
	"context"
	"crypto/tls"
	"crypto/x509"
	"errors"
	"fmt"
	"net"
	"time"

	"github.com/keybase/client/go/libkb"
	"github.com/keybase/client/go/msgpack"
	keybase1 "github.com/ke
    
func (a *RequestHandler) Reg1(ctx context.Context, arg keybase1.Reg1Arg) (ret keybase1.BinaryKID, err error) {
	defer func() {
		a.proc.Reg1(ctx, arg.Uid, arg.Kid, err)
	}()
	if a.state != stateNone {
		return ret, ErrWrongState
	}
	a.state = state1
	a.uid = arg.Uid
	a.userKey = arg.Kid
	ret = a.serverKey.Public.GetBinaryKID()
	a.sharedKey, err = precomputeKey(a.serverKey, a.userKey)
	if err != nil {
		return ret, err
	}
	return ret, err
}