Invoke

Activating Methods on page load or button click

Once you've created your Smart Contract method instance, optionally gathered your users inputs (not all methods require inputs!) now we need to invoke our method- Activate it!

We can invoke a method in one of two ways: on page load, when your website first loads for the user, or by clicking a button.

Invoke on Page Load

To invoke on page load, all you need to do is add data-dh-property-auto-invoke="true" to the method instance element we created earlier (thats the one that has the data-dh-property-contract-name and data-dh-property-method-name attributes.

<div
data-dh-feature="customContract"
data-dh-property-contract-name="dappherotest"
data-dh-property-method-name="hello"
data-dh-property-method-id="000"
data-dh-property-auto-invoke="true"
>

This will now auto-invoke a method on page load. This is useful for when you want to pre-populate some data on your website from a smart contract without needing to user to click on a button first.

For auto-invoked methods which require inputs, use Invisible Inputs.

Invoke on page Load will only work for View Methods. Transactions can not be invoked on page.

Invoke on Button Click

If you want your user to invoke the method, create a button instance and add the tag data-dh-property-invoke this will tell the DappHero engine to invoke the smart contract method when the button is clicked.

<button
data-dh-property-method-id="000"
data-dh-property-invoke="true"
>
Click Here to Call Your Smart Contract!
</button>

Invoke Reference

Tag

Value

Required

data-dh-property-invoke

true

yes

data-dh-property-auto-invoke

true

optional

data-dh-property-method-id

<<yourUniqueIdentifier>>

yes

​