createContractEventFilter
Creates a Filter to retrieve event logs that can be used with getFilterChanges or getFilterLogs.
Usage
By default, an Event Filter with an ABI (abi) will retrieve events defined on the ABI.
ts
import { publicClient } from './client'
import { wagmiAbi } from './abi'
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi
})
/**
* {
* abi: [...],
* id: '0x345a6572337856574a76364e457a4366',
* type: 'event'
* }
*/
ts
export const wagmiAbi = [
...
{
inputs: [
{
indexed: true,
name: "from",
type: "address",
},
{ indexed: true, name: "to", type: "address" },
{
indexed: true,
name: "tokenId",
type: "uint256",
},
],
name: "Transfer",
type: "event",
},
...
] as const;
ts
import { createPublicClient, http } from 'viem'
import { mainnet } from 'viem/chains'
export const publicClient = createPublicClient({
chain: mainnet,
transport: http()
})
Scoping
You can also scope a Filter to a set of given attributes (listed below).
Address
A Filter can be scoped to an address:
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
address: '0xfba3912ca04dd458c843e2ee08967fc04f3579c2'
})
Event
A Filter can be scoped to an event:
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
address: '0xfba3912ca04dd458c843e2ee08967fc04f3579c2',
eventName: 'Transfer'
})
Arguments
A Filter can be scoped to given indexed arguments:
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
address: '0xfba3912ca04dd458c843e2ee08967fc04f3579c2',
eventName: 'Transfer',
args: {
from: '0xd8da6bf26964af9d7eed9e03e53415d37aa96045',
to: '0xa5cc3c03994db5b0d9a5eedd10cabab0813678ac'
}
})
Only indexed arguments in event are candidates for args.
A Filter Argument can also be an array to indicate that other values can exist in the position:
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
address: '0xfba3912ca04dd458c843e2ee08967fc04f3579c2',
eventName: 'Transfer',
args: {
// '0xd8da...' OR '0xa5cc...' OR '0xa152...'
from: [
'0xd8da6bf26964af9d7eed9e03e53415d37aa96045',
'0xa5cc3c03994db5b0d9a5eedd10cabab0813678ac',
'0xa152f8bb749c55e9943a3a0a3111d18ee2b3f94e',
],
}
})
Block Range
A Filter can be scoped to a block range:
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
address: '0xfba3912ca04dd458c843e2ee08967fc04f3579c2',
eventName: 'Transfer',
fromBlock: 16330000n,
toBlock: 16330050n
})
Returns
Parameters
abi
- Type:
Abi
The contract's ABI.
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
})
address (optional)
- Type:
Address | Address[]
The contract address or a list of addresses from which Logs should originate. If no addresses are provided, then it will query all events matching the event signatures on the ABI.
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
address: '0xfba3912ca04dd458c843e2ee08967fc04f3579c2'
})
eventName (optional)
- Type:
string
The event name.
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
eventName: 'Transfer'
})
args (optional)
- Type: Inferred.
A list of indexed event arguments.
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
eventName: 'Transfer',
args: {
from: '0xd8da6bf26964af9d7eed9e03e53415d37aa96045',
to: '0xa5cc3c03994db5b0d9a5eedd10cabab0813678ac'
}
})
fromBlock (optional)
- Type:
bigint
Block to start querying/listening from.
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
fromBlock: 69420n
})
toBlock (optional)
- Type:
bigint
Block to query/listen until.
ts
const filter = await publicClient.createContractEventFilter({
abi: wagmiAbi,
fromBlock: 70120n
})