February 2018
Intermediate to advanced
288 pages
6h 58m
English
Content preview from Ethereum Smart Contract Development
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Factory pattern
This design pattern is a kind of creational design pattern. Using this pattern, objects can be created without specifying the exact class of creation.
Figure 11.4 is a simple hub (Barrel) that deploys contracts (Whisky) from a template and keeps track of the contracts created.
Whisky is part of the source file so Barrel can "see it" during compilation. Whisky's bytecode will become part of Barrel so the newWhisky() invocation knows what to do.
It is not necessary to deploy the template (Whisky), once the hub (Barrel) has been deployed.
We can create as many of the latter as needed by calling a function in the former:
Figure ...
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