// Copyright (c) 2014-2016 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.

package txscript_test

import (
	"encoding/hex"
	"fmt"
	"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"

	"github.com/kaspanet/kaspad/domain/consensus/utils/txscript"
	"github.com/kaspanet/kaspad/domain/dagconfig"
	"github.com/kaspanet/kaspad/util"
)

// This example demonstrates creating a script which pays to a kaspa address.
// It also prints the created script hex and uses the DisasmString function to
// display the disassembled script.
func ExamplePayToAddrScript() {
	// Parse the address to send the coins to into a util.Address
	// which is useful to ensure the accuracy of the address and determine
	// the address type. It is also required for the upcoming call to
	// PayToAddrScript.
	addressStr := "kaspa:qqfgqp8l9l90zwetj84k2jcac2m8falvvyy8xjtnhd"
	address, err := util.DecodeAddress(addressStr, util.Bech32PrefixKaspa)
	if err != nil {
		fmt.Println(err)
		return
	}

	// Create a public key script that pays to the address.
	script, err := txscript.PayToAddrScript(address)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Script Hex: %x\n", script.Script)

	disasm, err := txscript.DisasmString(script.Version, script.Script)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println("Script Disassembly:", disasm)

	// Output:
	// Script Hex: 76a914128004ff2fcaf13b2b91eb654b1dc2b674f7ec6188ac
	// Script Disassembly: OP_DUP OP_HASH160 128004ff2fcaf13b2b91eb654b1dc2b674f7ec61 OP_EQUALVERIFY OP_CHECKSIG
}

// This example demonstrates extracting information from a standard public key
// script.
func ExampleExtractScriptPubKeyAddress() {
	// Start with a standard pay-to-pubkey-hash script.
	scriptHex := "76a914128004ff2fcaf13b2b91eb654b1dc2b674f7ec6188ac"
	script, err := hex.DecodeString(scriptHex)
	if err != nil {
		fmt.Println(err)
		return
	}

	// Extract and print details from the script.
	scriptClass, address, err := txscript.ExtractScriptPubKeyAddress(
		&externalapi.ScriptPublicKey{
			Script:  script,
			Version: 0,
		}, &dagconfig.MainnetParams)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println("Script Class:", scriptClass)
	fmt.Println("Address:", address)

	// Output:
	// Script Class: pubkeyhash
	// Address: kaspa:qqfgqp8l9l90zwetj84k2jcac2m8falvvyy8xjtnhd
}