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WSS
Messages
subscribe
type:object
unsubscribe
type:object
subscribe_response
type:object
unsubscribe_response
type:object
update
type:object

​
Overview

  • Dataset ID: 0701 - Liquidity Pool TVL (USD)
  • Description: Pool TVL (Total Value Locked) snapshots in USD, computed from reserves multiplied by fiat prices. Grain: one row per (pool, event triple); pool_uid → blockdb_evm.b0211_liquidity_pools_v1.
  • Sample: Hugging Face Sample

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Subscription Parameters

​
chain_id
number
required
Target EVM network. See the Chain enumeration.
​
pool_uids
string[]
Optional filters: pool UIDs (32-byte hex, no 0x prefix).

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Message Fields

​
pool_uid
string
Pool identifier (hex).
​
exchange_id
number
Exchange identifier.
​
type_id
number
Pool type identifier.
​
block_number
number
Observation block.
​
block_time
string
Block time (ISO-8601).
​
tx_index
number
Transaction index.
​
log_index
number
Log index.
​
token_amounts
string[]
Decimals-adjusted token amounts (decimal strings), aligned with pool token order.
​
tvl_usd
string
Total value locked in USD (decimal string).
​
_tracing_id
string
Lineage id (hex).
​
_parent_tracing_ids
string[]
Parent lineage ids (hex).
​
_created_at
string
Record creation time (ISO-8601).
​
_updated_at
string
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": "0701", "chain_id": 1, "params": {}}'

​
Response Example

{
  "chain_id": 1,
  "dataset_id": "0701",
  "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,
    "token_amounts": [
      "1250.000000000000000000",
      "3950000.000000000000000000"
    ],
    "tvl_usd": "8750000.00",
    "_tracing_id": "0701c0ffee000000000000000000000000000000000000000000000000000001",
    "_parent_tracing_ids": [
      "0301c0ffee000000000000000000000000000000000000000000000000000001"
    ],
    "_created_at": "2025-12-20T12:35:01Z",
    "_updated_at": "2025-12-20T12:35:01Z"
  }
}
Last modified on April 6, 2026