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This article mainly shows you "how to use ABAP to achieve a blockchain prototype", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use ABAP to achieve a blockchain prototype" this article.

This section is mainly responsible for generating a table within the ABAP, and each row of records is a block of the block chain. For simplicity, each block has the following fields:

Block index

Block data-here is simply described by a string

Block hash-in this case, the contents of all the fields of the block are combined into a long string, and then the result calculated by SHA1 is used as the hash value of the block.

Timestamp-stores the timestamp calculated by the hash of the block, that is, the timestamp of the birth of the block

Hash of the previous block-A series of blocks are strung together to form a chain structure through this field.

NONCE-this field needs to be understood in conjunction with difficulty level (difficult level).

I use the input in the following figure to execute the test program

The block chain of the following figure is generated:

You can see that the hash of each block starts with 00000. This corresponds to the input difficulty level of 00000. This level means that if the first five characters of the hash calculated from the SHA1 described above do not start with 00000, discard, nonce plus 1, and continue the loop until the first five characters of the calculated hash do start with 00000. Therefore, the nonce field actually records how many SHA1 calculations have been performed since the block was born.

The second half of the test program is developed by myself to accept an ABAP inner table containing block chain data and output it in a chained structure. Because there is no ready-made linked list control in SAPGUI, I simulated it with a tree control.

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