Get Event Logs by Transaction Hash#
Query all event logs emitted by a single transaction, returned as a flat list (each element of the data array is one log). A single transaction returns at most 1000 logs, with no pagination. This endpoint supports EVM-compatible chains only.
Supported chains: see Get Event Log API Supported Chains (apiName: by-transaction).
Request URL#
GET
https://web3.okx.com/api/v6/explorer/log/by-transactionRequest Parameters#
| Parameter | Type | Required | Description |
|---|---|---|---|
| chainIndex | String | Yes | Unique identifier of the chain, e.g., 1 for ETH and 0 for BTC. See Get Event Log API Supported Chains for supported values. |
| txId | String | Yes | Transaction hash. |
Response Parameters#
| Parameter | Type | Description |
|---|---|---|
| height | String | Block height. |
| address | String | Contract address that emitted the event log. |
| topics | Array | Topic list, with String elements. |
| data | String | The event log's data field, as a hexadecimal string. |
| methodId | String | methodId, identifying the method that triggered the log. |
| blockHash | String | Block hash. |
| transactionTime | String | Transaction time, as a Unix timestamp in milliseconds. |
| logIndex | String | Log index. |
| txId | String | Transaction hash. |
Request Example#
shell
curl --location --request GET 'https://web3.okx.com/api/v6/explorer/log/by-transaction?chainIndex=1&txId=0x2d4f6b8e1c3a5d7f9b2e4c6a8d0f37d4b1e9c3a5f70d2b8e6c4a1f9d3b5e7c0a' \
--header 'OK-ACCESS-KEY: 37c541a1-****-****-****-10fe7a038418' \
--header 'OK-ACCESS-SIGN: leaV********3uw=' \
--header 'OK-ACCESS-PASSPHRASE: 1****6' \
--header 'OK-ACCESS-TIMESTAMP: 2023-10-18T12:21:41.274Z'
Response Example#
json
{
"code": "0",
"msg": "",
"data": [
{
"height": "21284215",
"address": "0xdac17f958d2ee523a2206206994597c13d831ec7",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x0000000000000000000000005041ed759dd4afc3a72b8192c143f72f4724081a",
"0x00000000000000000000000068b3465833fb72a70ecdf485e0e4c7bd8665fc45"
],
"data": "0x00000000000000000000000000000000000000000000000000000002540be400",
"methodId": "0x38ed1739",
"blockHash": "0xd9f2b4c6e8a0d1f3b5c7e9a2d4f6b8c0e1a1f3c5a0d9e7b2c4a6d8f0b1c3e5a7",
"transactionTime": "1733200079000",
"logIndex": "118",
"txId": "0x2d4f6b8e1c3a5d7f9b2e4c6a8d0f37d4b1e9c3a5f70d2b8e6c4a1f9d3b5e7c0a"
},
{
"height": "21284215",
"address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x00000000000000000000000068b3465833fb72a70ecdf485e0e4c7bd8665fc45",
"0x0000000000000000000000005041ed759dd4afc3a72b8192c143f72f4724081a"
],
"data": "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
"methodId": "0x38ed1739",
"blockHash": "0xd9f2b4c6e8a0d1f3b5c7e9a2d4f6b8c0e1a1f3c5a0d9e7b2c4a6d8f0b1c3e5a7",
"transactionTime": "1733200079000",
"logIndex": "119",
"txId": "0x2d4f6b8e1c3a5d7f9b2e4c6a8d0f37d4b1e9c3a5f70d2b8e6c4a1f9d3b5e7c0a"
}
]
}