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POST
/
v1
/
evm
/
flash-loans
/
prints
curl -X POST "https://api.blockdb.io/v1/evm/flash-loans/prints" \
  -H "Authorization: Bearer $BLOCKDB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "chain_id": 1,
  "from_block": 19000000,
  "to_block": 19000100,
  "limit": 50
}'

{
  "meta": {
    "chain_id": 1,
    "request_window": {
      "from_block": 19000000,
      "to_block": 19000100,
      "from_timestamp": null,
      "to_timestamp": null
    },
    "filters": {
      "pool_uids": [],
      "flash_loan_source_addresses": [],
      "token_addresses": [],
      "limit": 50,
      "cursor": null
    }
  },
  "data": [
    {
      "chain_id": 1,
      "block_number": 19000050,
      "block_time": "2025-11-11T10:00:00Z",
      "tx_index": 12,
      "log_index": 3,
      "pool_uid": "88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000",
      "exchange_id": 1,
      "type_id": 201,
      "flash_loan_source": "88e6a0c2ddd26feeb64f039a2c41296fcb3f564",
      "token": "c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
      "amount_borrowed": "1000000000000000000",
      "amount_repaid": "1003000000000000000",
      "fee_amount": "3000000000000000",
      "fee_rate_exact": "0.003",
      "_tracing_id": "0305c0ffee000000000000000000000000000000000000000000000000000001",
      "_parent_tracing_ids": [
        "0103c0ffee000000000000000000000000000000000000000000000000000001"
      ],
      "_created_at": "2025-11-11T10:00:05Z"
    }
  ],
  "cursor": null,
  "count": 1
}

​
Overview

  • Dataset ID: 0305 - Flash Loan Prints
  • Description: One row per borrowed token per on-chain flash loan event (V2-style flash swap, V3 Flash event, Balancer V2 Vault, etc.). pool_uid is NULL for vault-level events not tied to a single pool.
  • Sample: Hugging Face Sample

​
Parameters

​
chain_id
number
required
Target EVM network. See the Chain enumeration.

​
Range filters (mutually exclusive)

​
from_block
number
Starting block number (inclusive). Use with to_block.
​
to_block
number
Ending block number (inclusive). Use with from_block.
​
from_timestamp
string
Starting timestamp (ISO-8601). Use with to_timestamp.
​
to_timestamp
string
Ending timestamp (ISO-8601). Use with from_timestamp.
Provide either a block range or a time range or direct selectors (pool_uids, flash_loan_source_addresses, and/or token_addresses).
Do not mix block and timestamp ranges. Invalid combinations return HTTP 400.

​
Direct selectors

​
pool_uids
string[]
Filter to pool UIDs (32-byte hex, no 0x). Omitted or null pool_uid rows (vault-level) require other selectors if you need them.
​
flash_loan_source_addresses
string[]
Emitter contracts (20-byte hex, no 0x): pool or vault that emitted the event.
​
token_addresses
string[]
Borrowed token addresses (20-byte hex, no 0x).

​
Pagination

​
limit
number
default:"250"
Recommended default 250; maximum 1000 to stay under ~10 MB responses.
​
cursor
string
Opaque pagination cursor from a previous response.

​
Response fields

​
Meta

​
meta
object
Echo of request metadata applied to the response.
​
meta.chain_id
number
EVM chain ID echoed from the request.
​
meta.request_window
object
Normalized block/timestamp bounds derived from the request.
​
meta.filters
object
Echo of selectors and pagination from the request.

​
Data

​
data
object[]
Flash loan print records matching the request.
​
data.chain_id
number
EVM Chain ID for the record.
​
data.block_number
number
Block height of the event.
​
data.block_time
string
UTC timestamp of the block.
​
data.tx_index
number
Transaction index within the block.
​
data.log_index
number
Log index within the transaction.
​
data.pool_uid
string | null
32-byte internal pool id (hex), or null for vault-level flash loans.
​
data.exchange_id
number | null
Present when pool_uid is set; otherwise null.
​
data.type_id
number | null
Pool type id when pool_uid is set; otherwise null.
​
data.flash_loan_source
string
20-byte address of the contract that emitted the event (hex, no 0x).
​
data.token
string
20-byte ERC-20 token borrowed in this row (hex, no 0x).
​
data.amount_borrowed
string
Raw amount borrowed (not decimals-adjusted), as a string integer.
​
data.amount_repaid
string
Raw amount repaid including fee (not decimals-adjusted).
​
data.fee_amount
string
Raw fee: amount_repaid − amount_borrowed.
​
data.fee_rate_exact
string
Exact fee rate as lossless text (fee_amount / amount_borrowed).
​
data._tracing_id
string
Row tracing id (hex, no 0x).
​
data._parent_tracing_ids
string[]
Parent tracing ids.
​
data._created_at
string
Record creation timestamp (ISO-8601). The backing table does not define _updated_at; the API may omit it.

​
Envelope

​
cursor
string | null
Pagination cursor.
​
count
number
Number of rows in data.
curl -X POST "https://api.blockdb.io/v1/evm/flash-loans/prints" \
  -H "Authorization: Bearer $BLOCKDB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "chain_id": 1,
  "from_block": 19000000,
  "to_block": 19000100,
  "limit": 50
}'

{
  "meta": {
    "chain_id": 1,
    "request_window": {
      "from_block": 19000000,
      "to_block": 19000100,
      "from_timestamp": null,
      "to_timestamp": null
    },
    "filters": {
      "pool_uids": [],
      "flash_loan_source_addresses": [],
      "token_addresses": [],
      "limit": 50,
      "cursor": null
    }
  },
  "data": [
    {
      "chain_id": 1,
      "block_number": 19000050,
      "block_time": "2025-11-11T10:00:00Z",
      "tx_index": 12,
      "log_index": 3,
      "pool_uid": "88e6a0c2ddd26feeb64f039a2c41296fcb3f5640000000000000000000000000",
      "exchange_id": 1,
      "type_id": 201,
      "flash_loan_source": "88e6a0c2ddd26feeb64f039a2c41296fcb3f564",
      "token": "c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
      "amount_borrowed": "1000000000000000000",
      "amount_repaid": "1003000000000000000",
      "fee_amount": "3000000000000000",
      "fee_rate_exact": "0.003",
      "_tracing_id": "0305c0ffee000000000000000000000000000000000000000000000000000001",
      "_parent_tracing_ids": [
        "0103c0ffee000000000000000000000000000000000000000000000000000001"
      ],
      "_created_at": "2025-11-11T10:00:05Z"
    }
  ],
  "cursor": null,
  "count": 1
}
Last modified on March 21, 2026