eth_newFilter

Creates a new filter in the node, based on filter options. Used to notify state changes (logs). To check for state changes call eth_getFilterChanges.

Parameters​

Name	Type	Description
Filter	Filter	Filter logs based on this filter.

Filter

type Filter = {
  address?: Address; // Address from which logs generated.
  fromBlock?: HexString<Number> | "latest" | "earliest" | "pending"; // Block number or string the string "latest", "earliest" or "pending" to search from.
  toBlock?: HexString<Number> | "latest" | "earliest" | "pending"; // Block number or string the string "latest", "earliest" or "pending" to search to.
  topics?: HexString<Topic>[]; // Array of 0 - 4 topics.
  blockHash?: HexString<Hash>; // Block from which logs generated.
};

Return Type​

HexString<FilterId> - The new associated filter id.

Example​

await provider.request({
  method: "eth_newFilter",
  params: [
    {
      topics: [
        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
      ],
    },
  ],
});
// "0x10ff0bfba9472c87932c56632eef8f5cc70910e8e71d"