qortal-ui/crypto/api/deps/utils.js

const utils = {
	int32ToBytes(word) {
		var byteArray = []
		for (var b = 0; b < 32; b += 8) {
			byteArray.push((word >>> (24 - b % 32)) & 0xFF)
		}
		return byteArray
	},

	stringtoUTF8Array(message) {
		if (typeof message === 'string') {
			var s = unescape(encodeURIComponent(message)) // UTF-8
			message = new Uint8Array(s.length)
			for (var i = 0; i < s.length; i++) {
				message[i] = s.charCodeAt(i) & 0xff
			}
		}
		return message
	},
	// ...buffers then buffers.foreach and append to buffer1
	appendBuffer(buffer1, buffer2) {
		buffer1 = new Uint8Array(buffer1)
		buffer2 = new Uint8Array(buffer2)
		let tmp = new Uint8Array(buffer1.byteLength + buffer2.byteLength)
		tmp.set(buffer1, 0)
		tmp.set(buffer2, buffer1.byteLength)
		return tmp
	},

	int64ToBytes(int64) {
		// we want to represent the input as a 8-bytes array
		var byteArray = [0, 0, 0, 0, 0, 0, 0, 0]

		for (var index = 0; index < byteArray.length; index++) {
			var byte = int64 & 0xff
			byteArray[byteArray.length - index - 1] = byte
			int64 = (int64 - byte) / 256
		}

		return byteArray
	},

	hexToBytes(hexString) {
		return new Uint8Array(hexString.match(/.{1,2}/g).map(byte => parseInt(byte, 16)))
	},

	stringToHex(bytes) {
		return bytes.reduce((str, byte) => str + byte.toString(16).padStart(2, '0'), '')
	},

	equal(buf1, buf2) {
		if (buf1.byteLength != buf2.byteLength) return false
		var dv1 = new Uint8Array(buf1)
		var dv2 = new Uint8Array(buf2)
		for (var i = 0; i != buf1.byteLength; i++) {
			if (dv1[i] != dv2[i]) return false
		}
		return true
	},

	bytesToHex(byteArray) {
		var _byteArrayToHex = []

		for (var index = 0; index < byteArray.length; index++) {
			_byteArrayToHex.push((byteArray[index] >>> 4).toString(16))
			_byteArrayToHex.push((byteArray[index] & 15).toString(16));
		}

		return _byteArrayToHex.join("")
	}
}

export default utils