比特币解锁脚本中的ScriptSignature都包含了什么东西

比特币解锁脚本signature script 包含了那些东西?

使用 UTXO 需要私钥签名,私钥到底都签了什么东西呢?一直比较好奇.
比特币的私钥签名总共有五中类型,具体见 btcd 代码,如下:

// SigHashType represents hash type bits at the end of a signature.
type SigHashType uint32

// Hash type bits from the end of a signature.
const (
	SigHashOld          SigHashType = 0x0
	SigHashAll          SigHashType = 0x1
	SigHashNone         SigHashType = 0x2
	SigHashSingle       SigHashType = 0x3
	SigHashAnyOneCanPay SigHashType = 0x80

	// sigHashMask defines the number of bits of the hash type which is used
	// to identify which outputs are signed.
	sigHashMask = 0x1f
)