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Solidity is a contract-oriented, high-level language whose syntax is similar to that of JavaScript and it is designed for writing smart contracts in Ethereum to run on the EVM. Solidity is statically typed, supports inheritance, libraries and complex user-defined types among other features.

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mapp values do not upadte when calling other functions after populating the map

One thing you could try is to update the line below this.state.contract.methods.add(0, this.state.username, this.state.email, this.state.password).call() To this: this.state.contract.methods.add(0 …
AlexW's user avatar
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1 vote

How to manually add numbers to CappedCrowdsale

Based on my understanding to your question, you might need to deploy Crowdsale Contract first and then deploy CappedCrowdsale Contract with the parameter _cap to be the hard cap I'd like to set.
AlexW's user avatar
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