merkletree | A Merkle Tree implementation written in Go | Dataset library

I found answer. Previous block hash inside "mining.notify" is 8 x 4-Byte-string expressed as little endian.

in my case byte array: 852ab3ac_f6baeb51_e883cc88_f49ef03a_e17ed811_0009a5fb_00000000_00000000

This array is a collection of eight 4-Bytes words that, when converted to big endian, produce "00000000_00000000_0009a5fb_e17ed811_f49ef03a_e883cc88_f6baeb51_852ab3ac", which is Block 672486

It seems it needs some extra code in order to work. This code works:

From a pure typing perspective, MerkleTree.method will accept an argument of any type; Python has no way of restricting it.

From a duck-typing perspective, you promise that

• In the insertHelp method, insertHelp(root.rootNode.right, node) should be self.insertHelp(root.rootNode.right, node).
• In the insert method, insertHelp(root, node) should be self.insertHelp(root, node).

You did not get this error while executing:

I don't think this can be written using for anymore, but you can use while loop to get the job done:

The digest you're using and the digest the sha2 crate is using are incompatible. That they have the same name is irrelevant; as far as the compiler is concerned, you're trying to conflate two entirely different crates.

The quickest way to tell would be to see if digest shows up more than once during compilation, or more than once in your Cargo.lock file. You can also verify this manually by looking at crate dependencies. sha2 0.3.0 lists digest 0.3 in its dependencies, and 0.3 is not compatible with 0.4.

You need to either downgrade your crate's dependency on digest, or upgrade your crate's version of sha2 to one that uses a newer version of digest.