哥白尼项目组发布Pre-release v0.0.4

哥白尼项目组发布最新Pre-release版本客户端，版本号为0.0.4,我们在该版本中主要增加一下两点特性

• 增加了对CTOR排序算法的的支持，并兼容原来的TTOR排序算法
• 增加了对CheckDataSig操作码的支持

CTOR

原来的TTOR排序要求交易在区块中按照交易父子顺序排序，而CTOR排序算法取消了这一规则取而代之的是在区块中让交易按照交易hash排序，这样做好处有两点：
1）为后续使用更高效的区块传播算法做好准备
2）对SPV节点来说CTOR提供了不存在性证明

CheckDataSig

CheckDataSig是BCH中新增加的操作码，这个操作码可以丰富整个BCH生态，实现预言机相关的特定使用场景

Copernicus team released Pre-release v.0.0.4

Copernicus team released the latest Pre-release v.0.0.4 client and which added two features below：

• Add support for CTOR，which can be compatible with the TTOR
• Add support for the CheckDataSig opcodes

CTOR：

Most of the complexity of TTOR comes from the requirement of ordering parent transactions before children. While the CTOR requires that transactions should be ordered by the transaction hash in blocks. As such, moving from TTOR to CTOR provides following benefits:
1）Pave the way for using the more efficient block propagation algorithms
2）CTOR provides the exclusive proof for SPV nodes

CheckDataSig

CheckDataSig is the newly added opcode in BCH which can enrich the BCH ecology and implement the specific usage scenarios related to oracle machine