bytemanipulation_test.go

package bc_test

import (
	"encoding/hex"
	"testing"

	"github.com/libsv/go-bk/crypto"
	"github.com/libsv/go-bt/v2"

	"github.com/libsv/go-bc"
)

func TestGenesisHash(t *testing.T) {
	b, _ := hex.DecodeString("01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000")

	h := bt.ReverseBytes(crypto.Sha256d(b))

	str := hex.EncodeToString(h)

	expected := "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"

	if str != expected {
		t.Errorf("Expected %q, got %q", expected, str)
	}
}

func TestGenesisBlockHash(t *testing.T) {
	b, _ := hex.DecodeString("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")
	b = b[0:80]

	h := bt.ReverseBytes(crypto.Sha256d(b))

	str := hex.EncodeToString(h)

	expected := "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"

	if str != expected {
		t.Errorf("Expected %q, got %q", expected, str)
	}
}

func TestReverseHexString(t *testing.T) {

	expectedEven := "3910"
	expectedOdd := "391004"
	expectedLong := "4512710951122431"

	rhEven := bc.ReverseHexString("1039")

	if rhEven != expectedEven {
		t.Errorf("Expected reversed string to be '%+v', got %+v", expectedEven, rhEven)
	}

	rhOdd := bc.ReverseHexString("41039")
	if rhOdd != expectedOdd {
		t.Errorf("Expected reversed string to be '%+v', got %+v", expectedOdd, rhOdd)
	}

	rhLong := bc.ReverseHexString("3124125109711245")

	if rhLong != expectedLong {
		t.Errorf("Expected reversed string to be '%+v', got %+v", expectedLong, rhLong)
	}
}