This paper presents libtxsize, a library to estimate the size requirements of arbitrary Bitcoin transactions. To account for different use cases, the library provides estimates in bytes, virtual bytes, and weight units. In addition to all currently existing input, output, and witness types, the library also supports estimates for the anticipated Pay-to-Taproot transaction type, so that estimates can be used as input for models attempting to quantify the impact of Taproot on Bitcoin's scalability. libtxsize is based on analytic models, whose credibility is established through first-principle analysis of transaction types as well as exhaustive empirical validation. Consequently, the paper can also serve as reference for different Bitcoin data and transaction types, their semantics, and their size requirements (both from an analytic and empirical point of view).

中文翻译：

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libtxsize-一个用于自动进行比特币交易规模估算的库

本文介绍了libtxsize，这是一个用于估计任意比特币交易的大小要求的库。为了说明不同的用例，该库提供了字节，虚拟字节和权重单位的估计值。除了当前所有现有的输入，输出和见证人类型之外，该库还支持对预期的Pay-to-Taproot交易类型的估计，因此该估计值可用作试图量化Taproot对比特币可扩展性影响的模型的输入。 。libtxsize基于分析模型，其信誉是通过对交易类型的第一性原理分析以及详尽的经验验证来建立的。因此，本文还可作为不同比特币数据和交易类型，它们的语义，