Event Bot Monitoring

What is Event Bot Monitoring?

Event refers to the event in a smart contract. When a transaction occurs, it triggers the corresponding event, allowing users to trace the transaction by listening to the event.

Event monitoring achieves the purpose of monitoring specific behaviors on-chain by listening for events generated by smart contracts.

Typical Scenarios for Event Bot Monitoring

1. DeFi Liquidity Event Monitoring

   1. DeFi liquidity exceeds the set threshold

   2. DeFi liquidity falls below the set threshold

2. NFT Mint Event Monitoring

   1. An NFT starts minting

3. Token Mint Event Monitoring

   1. Large token unlocks monitoring

4. Others, etc.

Supported Data Sources

Data Source	Type	Stability
Ethereum	on chain	Very high
BSC	on chain	High
Avalanche	on chain	High
Polygon Pos	on chain	High
Arbitrum	on chain	High
Optimism	on chain	High
Polygon zkEVM	on chain	High
ZkSync Era	on chain	High
Base	on chain	High
Scroll	on chain	High
Manta	on chain	High
ZKFair	on chain	High
Blast	on chain	High
Linea	on chain	High
B2	on chain	High
Merlin	on chain	High

How to Configure Event Bot Monitoring?

After logging into the ChainBot platform, click "Create Bot" in the upper right corner -> "Event Monitor".

Chosen Event Monitor

⚠️ Note

When you select a specific Event, Conditions will automatically parse the fields contained within that Event, and they can only be fields from that specific Event. Therefore, Event and Conditions are corresponding relationships.

Info Description

Field Name	Description	Required
Name	Monitor Bot name	Yes
Chain	User-selected chain	Yes
Contract	User-selected contract	Yes
Event	User-selected event	Yes
Tags	Bot monitoring tags, useful for search	Yes

Conditions Description

Conditions in event monitoring dynamically change based on the selected Event.

For example, when monitoring the Approval event in the USDT contract, since the Event Approval(owner: address, spender: address, value: uint256) has three parameters, the fields available in conditions are also three: owner, spender, and value. Configure your parameters based on your conditions to achieve your goals.

Template Variable Description

Variable	Description	Example
$block.time	Block where the event was generated	16073651
$tx.hash	Transaction hash that generated the event	transaction hash
$event.contract	Contract address that generated the event	16073651
$event.params.{abc}	Key fields parsed from the event	$event.params.tokens
$chain.explore	Prefix of the current chain's explorer	https://etherscan.io/
$subscription.id	Subscription alert ID	306310837801629120
$subscription.name	Subscription alert name	USDC New Mint

Default Notification Template

[ {$subscription.name} ]
  Contract: {$event.contract}
  Time: {$block.time}
  Explore: {$chain.explore}/tx/{$tx.hash}
  Created By ChainBot.io

Learn about alert notification templates?

Notification Message Example

[ CRV Liquidation Call Monitor ] Contract: 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9 Amount: 187743.2161384799 CRV Time: 2022-11-23T02:09:23+08:00 Explore: https://etherscan.io/tx/0x47ffc7939cf8deed6a28357934f98402892b370ac2d3be0c6576f733f6d97b1e Created By ChainBot.io

Event Bot Monitoring Cases

Event Bot Case Study