Verification Of A Sensible Contract For A Simple On Line Casino

Ahrendt and his co-authors [2] wrote a Solidity [7] contract111See https://git.io/fx6cn — 219 supply traces of code (SLOC) including comments. to mannequin this casino, then translated that contract into Java with JML [11] specifications222See https://git.io/JONSW — 732 SLOC of Java and JML. and used the key verification tool [1] to verify two of the methods. They developed a translation instrument referred to as JAVADITY333See https://github.com/rebiscov/Javadity. to translate Solidity contracts into Java, and then added JML specifications to the generated Java code. KeY has native help for JavaCard, which is a Java derivative that supports a transaction mechanism with rollback of interrupted transactions. They used these JavaCard features to model the state-reverting exceptions of Solidity, which ensure that the state is left unchanged when errors come up.

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