prysm-pulse/encoding/bytesutil/bytes_legacy.go

//go:build !go1.20
// +build !go1.20

package bytesutil

// These methods use copy() to convert a byte slice to a fixed size array.
// This approach is used for go1.19 and below.

// ToBytes4 is a convenience method for converting a byte slice to a fix
// sized 4 byte array. This method will truncate the input if it is larger
// than 4 bytes.
func ToBytes4(x []byte) [4]byte {
	var y [4]byte
	copy(y[:], x)
	return y
}

// ToBytes20 is a convenience method for converting a byte slice to a fix
// sized 20 byte array. This method will truncate the input if it is larger
// than 20 bytes.
func ToBytes20(x []byte) [20]byte {
	var y [20]byte
	copy(y[:], x)
	return y
}

// ToBytes32 is a convenience method for converting a byte slice to a fix
// sized 32 byte array. This method will truncate the input if it is larger
// than 32 bytes.
func ToBytes32(x []byte) [32]byte {
	var y [32]byte
	copy(y[:], x)
	return y
}

// ToBytes48 is a convenience method for converting a byte slice to a fix
// sized 48 byte array. This method will truncate the input if it is larger
// than 48 bytes.
func ToBytes48(x []byte) [48]byte {
	var y [48]byte
	copy(y[:], x)
	return y
}

// ToBytes64 is a convenience method for converting a byte slice to a fix
// sized 64 byte array. This method will truncate the input if it is larger
// than 64 bytes.
func ToBytes64(x []byte) [64]byte {
	var y [64]byte
	copy(y[:], x)
	return y
}

// ToBytes96 is a convenience method for converting a byte slice to a fix
// sized 96 byte array. This method will truncate the input if it is larger
// than 96 bytes.
func ToBytes96(x []byte) [96]byte {
	var y [96]byte
	copy(y[:], x)
	return y
}