RPC eth_getFilterChanges dose not work as expected with blockNumber filter

[banishee]

System info: [Include Ethermint commit, operating system name, and other relevant details]

• branch dev

Steps to reproduce:

1. Deploy a contract (make sure this contract will emit events), then get specific block height and contract address
2. Enter the contract address, topic names and starting block height, then create a filter parameter
3. Based on this filter parameter, try to call eth_getFilterChanges api to get logs.
4. But the result log is null.

The test code is as follows:

func TestEth_GetFilterChanges_Addresses(t *testing.T) {
        // Deploy contract which will emit event in constructor function
	_, receipt := deployTestContract(t, hexAddr1, testContractKind)
	contractAddrHex := receipt["contractAddress"].(string)
	blockHeight := receipt["blockNumber"].(string)
	
        // Create filter
	param := make([]map[string]interface{}, 1)
	param[0] = make(map[string]interface{})
	param[0]["addresses"] = []string{contractAddrHex}
	param[0]["topics"] = []string{helloTopic, worldTopic}
	param[0]["fromBlock"] = blockHeight
	rpcRes := Call(t, "eth_newFilter", param)

	var ID string
	require.NoError(t, json.Unmarshal(rpcRes.Result, &ID))
	t.Logf("create filter focusing on contract %s successfully with ID %s\n", contractAddrHex, ID)

	// Based on this filter id, query the changed ethlogs
	changesRes := Call(t, "eth_getFilterChanges", []string{ID})

	var logs []ethtypes.Log
	require.NoError(t, json.Unmarshal(changesRes.Result, &logs))
	require.Equal(t, 1, len(logs))
}

The error output:

=== RUN   TestEth_GetFilterChanges_Addresses
    utils_test.go:143: 0x2CF4ea7dF75b513509d95946B43062E26bD88035 has deployed a contract 0xe786781cb7a89017c758570b8e1e223551f7b71a with tx hash 0xcf67e7385c067ee5616ce32f6992c55725238e5d7cf200f332b02b15bb80729c successfully
    rpc_test.go:1083: create filter focusing on contract 0xe786781cb7a89017c758570b8e1e223551f7b71a successfully with ID 0xb821364c629d465dd6357b34b1efb47
    rpc_test.go:1090: 
        	Error Trace:	rpc_test.go:1090
        	Error:      	Not equal: 
        	            	expected: 1
        	            	actual  : 0
        	Test:       	TestEth_GetFilterChanges_Addresses
--- FAIL: TestEth_GetFilterChanges_Addresses (8.06s)

Expected behavior: [What you expected to happen]

• It should return a specific log

Actual behavior: [What actually happened]

• Developers cannot use filter api to query events with specified conditions

Additional info: [Include gist of relevant config, logs, etc.]

[github-actions[bot]]

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