Contracts Getters

All these getters are accessible from from ethvtx/lib/getters;

To efficiently recover informations about the contracts from the state (ex: in mapStateToProps), you can use the contracts getter helper functions. All of them take the state of the store as first argument.

getContractSpecList(state: State) => string[]

This function will give you a full list of loaded contract specs.

const mapStateToProps = (state) => ({
    spec_list: getContractSpecList(state)
});

getContract(state: State, contract_name: string, address_or_alias: string) => VtxContract

Very useful function. By providing a contract type and its address / alias, it will recover the VtxContract instance for you.

    
const mapStateToProps = (state) => ({
    my_contract_by_address: getContract(state, 'SimpleStorage', '
0x32dc9d787df5bffb7218bd247c7bc7838151d87f')
});

// Assuming you added the contract instance with a @default alias
const mapStateToProps = (state) => ({
    my_contract_by_alias: getContract(state, 'SimpleStorage', '
@default')
});

// Nice to chain with constant method call ...
const mapStateToProps = (state) => ({
    my_contract_data: getContract(state, 'SimpleStorage', '
@default').fn.getData()
});

// ... or even with event fetch call
const mapStateToProps = (state) => ({
    my_contract_data: getContract(state, 'SimpleStorage', '
@default').events.ValueChanged()
});

getContractList(state: State) => ContractList

The ContractList type is defined by:

{
    [key: string]: string[];
}

This method will return all the currently loaded instances of all the different types of contracts. The returned list is only a list of addresses.

const mapStateToProps = (state) => ({
    simple_storage_list: getContractList(state).SimpleStorage
});