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feat: token-registry smart contract validation#269
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Summary
Input Validation for Token Registry and Token Id
Changes
src/implementations/title-escrow/helpers.tsTo do validation on smart contract - using getCode and calling genesis()
https://docs.ethers.org/v5/api/providers/provider/#Provider-getCode
genesis is part of Token Registry - no gas fees as it's a view function
src/implementations/testsHelper.tsTo help with mocking smart contract and ethers behaviour
Used by merging (mergeMockSmartContract) base contract behaviour (getMockTokenRegistry) and overrides (user-specified)
issue, acceptSurrender and rejectSurrender with testupdated implementation and test code by utilising helper code on
testHelperandhelpersIssues
#263