December 2018
Beginner to intermediate
564 pages
17h 34m
English
Content preview from Blockchain Developer's Guide
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Data quality and mistakes
Like all systems, smart contracts are only as good as the data they act on. A smart contract that receives bad or incorrect information from the network will still execute. On blockchain systems, this can be a huge issue as most transactions initiated by a human or a contract are irrevocable. Thus, if information is placed on a blockchain that is in error, fraudulent, or has some other deficiency, then a smart contract will still execute faithfully. Instead of expediting the proper functioning of the network, the smart contract would now be assisting in propagating an error.
To use the earlier example of shipping tires between FakeCar and Wheelmaster, what if during transit the boxes holding the tires were broken ...
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