Messages
No examples found{
"action": "<string>",
"chain_id": 123,
"dataset_id": "<string>"
}No examples foundNo examples found{
"chain_id": 123,
"dataset_id": "<string>",
"is_reorg": true,
"data": {
"pool_uid": "<string>",
"total_fee": "<string>",
"user_fee": "<string>",
"protocol_fee": "<string>",
"block_number": 123,
"_tracing_id": "<string>"
}
}Entities
Pool Fee Terms
Subscribe to real-time updates for AMM pool fee configurations.
WSS
/
Overview
- Dataset ID:
0212 - Liquidity Pool Fee Terms - Description: Per-pool fee configuration (total fee + split between user/LP, protocol, and extra recipients).
- Sample: Hugging Face Sample
Subscription Parameters
Filter updates to specific BlockDB pool identifiers.
Filter updates by exchange identifiers. See the DigitalExchange enumeration.
Message Fields
BlockDB pool identifier.
Exchange/DEX identifier.
Pool type identifier.
Block height where the fee-terms record is anchored.
Block time (ISO-8601).
Transaction index.
Log index.
Total fee fraction (e.g.,
0.003 = 0.30%). String to preserve NUMERIC(18,18) precision.Absolute fee fraction allocated to LPs/users (same units as
total_fee).Absolute fee fraction allocated to protocol/treasury (same units as
total_fee).Absolute fee fraction allocated to extra destinations (same units as
total_fee).Row-level lineage hash for correlation.
Parent lineage ids (hex).
Record creation time (ISO-8601).
Record last update time (ISO-8601).
Subscription Example
# Use wscat to connect and subscribe
wscat -c wss://api.blockdb.io/v1/evm/ \
-H "Authorization: Bearer $BLOCKDB_API_KEY" \
-x '{"action": "subscribe", "dataset_id": "0212", "chain_id": 1, "params": {"pool_uids": ["88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000"]}}'
#include <libwebsockets.h>
#include <string.h>
#include <stdio.h>
static int callback_blockdb(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len) {
switch (reason) {
case LWS_CALLBACK_CLIENT_ESTABLISHED:
lws_callback_on_writable(wsi);
break;
case LWS_CALLBACK_CLIENT_RECEIVE:
printf("Received: %s\n", (char *)in);
break;
case LWS_CALLBACK_CLIENT_WRITEABLE: {
unsigned char buf[LWS_PRE + 512];
unsigned char *p = &buf[LWS_PRE];
size_t n = sprintf((char *)p, "{\"action\": \"subscribe\", \"dataset_id\": \"0212\", \"chain_id\": 1, \"params\": {\"pool_uids\": [\"88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000\"]}}");
lws_write(wsi, p, n, LWS_WRITE_TEXT);
break;
}
}
return 0;
}
using System;
using System.Net.WebSockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
class Program {
static async Task Main() {
using var ws = new ClientWebSocket();
ws.Options.SetRequestHeader("Authorization", $"Bearer {Environment.GetEnvironmentVariable("BLOCKDB_API_KEY")}");
await ws.ConnectAsync(new Uri("wss://api.blockdb.io/v1/evm/"), CancellationToken.None);
var subMsg = "{\"action\": \"subscribe\", \"dataset_id\": \"0212\", \"chain_id\": 1, \"params\": {\"pool_uids\": [\"88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000\"]}}";
await ws.SendAsync(new ArraySegment<byte>(Encoding.UTF8.GetBytes(subMsg)), WebSocketMessageType.Text, true, CancellationToken.None);
var buffer = new byte[1024 * 4];
while (ws.State == WebSocketState.Open) {
var result = await ws.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
Console.WriteLine(Encoding.UTF8.GetString(buffer, 0, result.Count));
}
}
}
import websocket
import json
import os
def on_message(ws, message):
print(f"Received: {message}")
def on_open(ws):
msg = {
"action": "subscribe",
"dataset_id": "0212",
"chain_id": 1,
"params": {
"pool_uids": ["88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000"]
}
}
ws.send(json.dumps(msg))
ws = websocket.WebSocketApp(
"wss://api.blockdb.io/v1/evm/",
header={"Authorization": f"Bearer {os.getenv('BLOCKDB_API_KEY')}"},
on_message=on_message,
on_open=on_open
)
ws.run_forever()
const WebSocket = require('ws');
const ws = new WebSocket('wss://api.blockdb.io/v1/evm/', {
headers: { 'Authorization': `Bearer ${process.env.BLOCKDB_API_KEY}` }
});
ws.on('open', () => {
ws.send(JSON.stringify({
action: 'subscribe',
dataset_id: '0212',
chain_id: 1,
params: {
pool_uids: ["88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000"]
}
}));
});
ws.on('message', (data) => {
console.log('Received:', JSON.parse(data));
});
package main
import (
"fmt"
"log"
"net/http"
"os"
"github.com/gorilla/websocket"
)
func main() {
header := http.Header{"Authorization": []string{"Bearer " + os.Getenv("BLOCKDB_API_KEY")}}
c, _, err := websocket.DefaultDialer.Dial("wss://api.blockdb.io/v1/evm/", header)
if err != nil {
log.Fatal("dial:", err)
}
defer c.Close()
sub := `{"action": "subscribe", "dataset_id": "0212", "chain_id": 1, "params": {"pool_uids": ["88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000"]}}`
err = c.WriteMessage(websocket.TextMessage, []byte(sub))
if err != nil {
log.Fatal("write:", err)
}
for {
_, message, err := c.ReadMessage()
if err != nil {
log.Fatal("read:", err)
}
fmt.Printf("Received: %s\n", message)
}
}
Response Example
{
"chain_id": 1,
"dataset_id": "0212",
"is_reorg": false,
"data": {
"pool_uid": "88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000",
"exchange_id": 1,
"type_id": 201,
"block_number": 19001234,
"block_time": "2025-12-20T12:34:56Z",
"tx_index": 7,
"log_index": 12,
"total_fee": "0.003000000000000000",
"user_fee": "0.003000000000000000",
"protocol_fee": "0.000000000000000000",
"extra_fee": "0.000000000000000000",
"_tracing_id": "0212c0ffee000000000000000000000000000000000000000000000000000001",
"_parent_tracing_ids": [
"0103c0ffee000000000000000000000000000000000000000000000000000001"
],
"_created_at": "2025-12-20T12:35:01Z",
"_updated_at": "2025-12-20T12:35:01Z"
}
}
Messages
No examples found{
"action": "<string>",
"chain_id": 123,
"dataset_id": "<string>"
}No examples foundNo examples found{
"chain_id": 123,
"dataset_id": "<string>",
"is_reorg": true,
"data": {
"pool_uid": "<string>",
"total_fee": "<string>",
"user_fee": "<string>",
"protocol_fee": "<string>",
"block_number": 123,
"_tracing_id": "<string>"
}
}subscribe
type:object
unsubscribe
type:object
subscribe_response
type:object
unsubscribe_response
type:object
update
type:object
Last modified on April 6, 2026
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