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User Defined Streams
Monitor your Smart Contract Events and External Functions
User Defined Streams — are the streams that are generated in our Platform when user uploads an Application Binary Interface (ABI) on our Portal. After an ABI is provided you can start monitoring your Smart Contract's events and function calls momentarily.
Supported Functions
Stream Name Convention
After you upload an ABI your events and external functions will be available as a separate stream with the following name pattern:
Blockchain_ContractName_EventName_EventsBlockchain_ContractName_EventName_FunctionsGiven an Ethereum Smart Contract with the name "MySmartContract" and event name "MyEvent" your stream name will be as following:
ETH_MySmartContract_MyEvent_EventsGiven an Ethereum Smart Contract with the name "MySmartContract" and event name "Deposit" your stream name will be as following:
ETH_MySmartContract_Deposit_EventsEvent Parameters
All the parameters produced by an event can be used in your Smart Trigger and can be either a part of notification that we will send to you or can be used for your business logic within a Smart Trigger.
Given an event:
event MyEvent(address indexed _address, string _name);you will be able to utilize your parameters as
@_address and @_name.Function Parameters
All the parameters that are passed in function call can be used in your Smart Trigger and can be either a part of notification that we will send to you or can be used for your business logic within a Smart Trigger.
Given a function:
function deposit(uint256 _assetQuantity, address _from)you will be able to utilize your parameters as
@_assetQuantity and @_from.Examples
Events
Let's assume that you uploaded your ABI with the name
MySmartContract with an event:event MyEvent(address indexed _address, string _name);Now this event can be easily monitored using ParsiQL:
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stream _
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from ETH_MySmartContract_MyEvent_Events
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where @contract == ETH.address("0xccec89631d2bCeB35B884c2538BcEBc245a71D0b")
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​
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process
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emit { @_address, @_name, message: "MyEvent was just fired." }
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end
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​
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Once your Smart Contract has fired an event—you will instantly get a notification (according to Smart Trigger's configuration)
Let's have another event:
event MySecondEvent(address indexed _from, address indexed _to, string _symbol);1
stream _
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from ETH_MySmartContract_MySecondEvent_Events
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where @contract == ETH.address("0xD06cf06D1cF132F5F0b974be13Ad3bdcc633992c")
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​
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process
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if @_from == ETH.address("0xD849f7442857533fAe5adD8377476415cE5e79e4")
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&& @_symbol == "PRQ" then
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emit { message: "Address X just fired MySecondEvent with token PRQ." }
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end
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end
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Functions
Let's assume that you uploaded your ABI with the name
MySmartContract with a functionfunction deposit(uint256 _assetQuantity, address _from)Now this external function can be easily monitored using ParsiQL:
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stream _
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from ETH_MySmartContract_Deposit_Functions
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where @contract == ETH.address("0xD06cf06D1cF132F5F0b974be13Ad3bdcc633992c")
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​
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process
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if @_from == ETH.address("0xD849f7442857533fAe5adD8377476415cE5e79e4") then
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emit { message: "Address X just made a deposit", @_from, @_assetQuantity }
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end
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end
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This trigger will produce the following JSON payload:
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{
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message: "Address X just made a deposit",
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_from: "0xD849f7442857533fAe5adD8377476415cE5e79e4",
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_assetQuantity: 140000000000000000
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}
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Last modified 4mo ago