Response Body
The body contains the data you are interested in. Logs is in array containing raw events and stream information such as tag and the streamId. The body also contains a chainId, the blocknumber, internal transactions, the abis and a confirmed field that indicates if the block is confirmed.
How to verify the signature for the received webhook request​
In JavaScript or python, you can use this function, for other programming languages you can adapt this code. The secret key is the streams secret which you can find in setting page.
- index.js (JavaScript)
- index.py (Python)
const verifySignature = (req, secret) => {
const providedSignature = req.headers["x-signature"];
if (!providedSignature) throw new Error("Signature not provided");
const generatedSignature = web3.utils.sha3(JSON.stringify(req.body) + secret);
if (generatedSignature !== providedSignature)
throw new Error("Invalid Signature");
};
def verify_Signature(req, secret):
provided_signature = req.headers.get("x-signature")
if not provided_signature:
raise TypeError("Signature not provided")
data = req.data+secret.encode()
signature = Web3.keccak(text=data.decode()).hex()
if provided_signature != signature:
raise ValueError("Invalid Signature")
Native transaction​
For native transaction you have to set Native Transactions (txs) in admin interface when you create or update a Stream. Or you can set includeNativeTxs to true if you are using the swagger interface directly or the SDK.
{
"confirmed": false,
"chainId": "0x1",
"abi": [],
"streamId": "c28d9e2e-ae9d-4fe6-9fc0-5fcde2dcdd17",
"tag": "native_transactions",
"retries": 0,
"block": {
"number": "15988759",
"hash": "0x3aa07bd98e328db97ec273ce06b3a15fc645931fbd26337fe20c48b274277f76",
"timestamp": "1668676247"
},
"logs": [],
"txs": [
{
"hash": "0xd68700a0e2abd9c041eb236812e4194bf91c8182a2b03065887ab0f33d5c2958",
"gas": "149200",
"gasPrice": "13670412399",
"nonce": "57995",
"input": "0xf78dc253000000000000000000000000d9408f29026e32852aff8c5c9c8ea834b44b4e1c000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb4800000000000000000000000000000000000000000000000000000000109fad200000000000000000000000000000000000000000000009ab31572a589a72a11900000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000180000000000000003b6d0340a5c475167f03b1556c054e0da78192cd2779087fcfee7c08",
"transactionIndex": "52",
"fromAddress": "0x839d4641f97153b0ff26ab837860c479e2bd0242",
"toAddress": "0x1111111254eeb25477b68fb85ed929f73a960582",
"value": "0",
"type": "2",
"v": "1",
"r": "46904304245026065492026869531757792493071866863221741878090753056388581469881",
"s": "17075445080437932806356212399757328600893345374993510540712828450455909549452",
"receiptCumulativeGasUsed": "3131649",
"receiptGasUsed": "113816",
"receiptContractAddress": null,
"receiptRoot": null,
"receiptStatus": "1"
}
],
"txsInternal": [],
"erc20Transfers": [],
"erc20Approvals": [],
"nftApprovals": {
"ERC1155": [],
"ERC721": []
},
"nftTransfers": []
}
Native transactions and NFTs, ERC20s, Approvals events​
For native transactions there is also the option to get automatically the logs/events for NFTs, ERC20s and Approval events. For that you have to select Native Transactions (txs) and Contract interactions (logs) in admin interface when you create or update a Stream. Or you can set to true includeContractLogs and includeNativeTxs when using the swagger interface directly or the SDK.
{
"confirmed": true,
"chainId": "0x1",
"abi": [],
"streamId": "c28d9e2e-ae9d-4fe6-9fc0-5fcde2dcdd17",
"tag": "native_transactions_with_logs",
"retries": 0,
"block": {
"number": "15988780",
"hash": "0xf40d623518fa16c20614278656e426721820031913fd9c670330d4b2b751d50e",
"timestamp": "1668676499"
},
"logs": [
{
"logIndex": "135",
"transactionHash": "0x59cd370a41c699bdb77a020b3a27735bb7442ace68ec8313040b8b9ee2672244",
"address": "0x96beaa1316f85fd679ec49e5a63dacc293b044be",
"data": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"topic0": "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
"topic1": "0x0000000000000000000000001748789703159580520cc2ce6d1ba01e7359c44c",
"topic2": "0x0000000000000000000000001111111254eeb25477b68fb85ed929f73a960582",
"topic3": null
}
],
"txs": [
{
"hash": "0x0bd4d05cfee0107ac69f7add8e21d66c3e4fd014b7aad595d6336910a6bfee39",
"gas": "109803",
"gasPrice": "13481860832",
"nonce": "291",
"input": "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",
"transactionIndex": "92",
"fromAddress": "0x3ec92c9d09403a76bda445ffdfaf6de59717219f",
"toAddress": "0x1111111254eeb25477b68fb85ed929f73a960582",
"value": "0",
"type": "2",
"v": "0",
"r": "5776335037912114053229884461119750189570811705028494471955321961511802532800",
"s": "50481622078880425443801093626517935308993319586804232237135731552994210947860",
"receiptCumulativeGasUsed": "7225224",
"receiptGasUsed": "70168",
"receiptContractAddress": null,
"receiptRoot": null,
"receiptStatus": "1"
}
],
"txsInternal": [],
"erc20Transfers": [],
"erc20Approvals": [
{
"transactionHash": "0x59cd370a41c699bdb77a020b3a27735bb7442ace68ec8313040b8b9ee2672244",
"logIndex": "135",
"contract": "0x96beaa1316f85fd679ec49e5a63dacc293b044be",
"owner": "0x1748789703159580520cc2ce6d1ba01e7359c44c",
"spender": "0x1111111254eeb25477b68fb85ed929f73a960582",
"value": "115792089237316195423570985008687907853269984665640564039457584007913129639935",
"tokenName": "This Is Not Alpha",
"tokenSymbol": "TINA",
"tokenDecimals": "18",
"valueWithDecimals": "1.15792089237316195423570985008687907853269984665640564039457584007913129639935e+59"
}
],
"nftApprovals": {
"ERC1155": [],
"ERC721": []
},
"nftTransfers": []
}
ERC20 Transfers​
The ERC20 transfer data is automatically decoded from the logs and is provided for no additional record cost. The data is included in both the confirmed: false and confirmed: true payload for valid ERC20 transfers. We provide you with some useful metadata such as tokenName, tokenSymbol and tokenDecimals, in addition to the to, from, value, transactionHash, logIndex and address of the contract.
{
"confirmed": false,
"chainId": "0x5",
"abi": [],
"streamId": "c4cf9b1a-0cb3-4c79-9ca3-04f11856c555",
"tag": "ChrisWallet",
"retries": 0,
"block": {
"number": "8037952",
"hash": "0x607ff512f17f890bf9ee6206e2029cd8530819ab72b2b9161f9b90d18ece8e03",
"timestamp": "1669667244"
},
"logs": [
{
"logIndex": "132",
"transactionHash": "0x1642a3b9b39e63d7fe571e7c22b80a5b059d2647fe4866d3f7105630f822d833",
"address": "0x0041ebd11f598305d401cc1052df49219630ab79",
"data": "0x0000000000000000000000000000000000000000000069e10006afc3291c0000",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"topic1": "0x0000000000000000000000000a46413965858a6ac4ed5184d7643dc055a4fea3",
"topic2": "0x000000000000000000000000e496601436da37a045d8e88bbd6b2c2e17d8fe33",
"topic3": null
}
],
"txs": [
{
"hash": "0x1642a3b9b39e63d7fe571e7c22b80a5b059d2647fe4866d3f7105630f822d833",
"gas": "85359",
"gasPrice": "6129141152",
"nonce": "88",
"input": "0xa9059cbb000000000000000000000000e496601436da37a045d8e88bbd6b2c2e17d8fe330000000000000000000000000000000000000000000069e10006afc3291c0000",
"transactionIndex": "49",
"fromAddress": "0x0a46413965858a6ac4ed5184d7643dc055a4fea3",
"toAddress": "0x0041ebd11f598305d401cc1052df49219630ab79",
"value": "0",
"type": "2",
"v": "1",
"r": "86947778944630951418310264989677611886333891146913483133255814972120449355054",
"s": "7019311275916215306620036726907048105130260362064080269753410507440852031640",
"receiptCumulativeGasUsed": "11882265",
"receiptGasUsed": "56906",
"receiptContractAddress": null,
"receiptRoot": null,
"receiptStatus": "1"
}
],
"txsInternal": [],
"erc20Transfers": [
{
"transactionHash": "0x1642a3b9b39e63d7fe571e7c22b80a5b059d2647fe4866d3f7105630f822d833",
"logIndex": "132",
"contract": "0x0041ebd11f598305d401cc1052df49219630ab79",
"from": "0x0a46413965858a6ac4ed5184d7643dc055a4fea3",
"to": "0xe496601436da37a045d8e88bbd6b2c2e17d8fe33",
"value": "499999000000000000000000",
"tokenName": "Example Token",
"tokenSymbol": "Token",
"tokenDecimals": "18",
"valueWithDecimals": "499999"
}
],
"erc20Approvals": [],
"nftApprovals": {
"ERC1155": [],
"ERC721": []
},
"nftTransfers": []
}
NFT Transfers​
The NFT transfer data is also automatically decoded from the logs and is provided for no additional record cost, similar to ERC20 Transfers. The NFT data is included in both the confirmed: false and confirmed: true payload for valid NFT transfers.
We provide you with some useful metadata such as:
tokenName: the name of the NFTtokenSymbol: the symbol of the NFT (only for ERC721)tokenContractType: the type of the NFT (either ERC721 or ERC1155)to: the receiver address of the NFT transferfrom: the sender address of the NFT transferamount: the amount of NFT transferred in the transaction (1for ERC721)transactionHash: the transaction hash of the NFT transfer on the blockchaintokenId: the token ID of the NFT transferredoperator: a third party address that has been approved to manage NFTs owned byfromaddress. You can read more about operator in the EIP1155 standard.contract: the contract address of the NFT transferred
{
"confirmed": false,
"chainId": "0x13881",
"abi": [],
"streamId": "c4cf9b1a-0cb3-4c79-9ca3-04f11856c555",
"tag": "ChrisWallet",
"retries": 0,
"block": {
"number": "29381772",
"hash": "0xdd64099df718e2a439a9805d25a3ab88e943a8c713f2259d9777460d7051572c",
"timestamp": "1669640635"
},
"logs": [
{
"logIndex": "72",
"transactionHash": "0x5ecd6b57593ab2f4f3e39fbb3318a3933e2cf9fdcf5b7ca671fb0fc2ce9dc4b5",
"address": "0x26b4e79bca1a550ab26a8e533be97c40973b2671",
"data": "0x",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"topic1": "0x00000000000000000000000074f64bebb1a9615fc7c2ead9c894b6ffd1803582",
"topic2": "0x000000000000000000000000e496601436da37a045d8e88bbd6b2c2e17d8fe33",
"topic3": "0x0000000000000000000000000000000000000000000000000000000000000000"
}
],
"txs": [],
"txsInternal": [],
"erc20Transfers": [],
"erc20Approvals": [],
"nftApprovals": {
"ERC1155": [],
"ERC721": []
},
"nftTransfers": [
{
"operator": null,
"from": "0x74f64bebb1a9615fc7c2ead9c894b6ffd1803582",
"to": "0xe496601436da37a045d8e88bbd6b2c2e17d8fe33",
"tokenId": "0",
"amount": "1",
"transactionHash": "0x5ecd6b57593ab2f4f3e39fbb3318a3933e2cf9fdcf5b7ca671fb0fc2ce9dc4b5",
"logIndex": "72",
"contract": "0x26b4e79bca1a550ab26a8e533be97c40973b2671",
"tokenName": "Test",
"tokenSymbol": "SYMBOL",
"tokenContractType": "ERC721"
}
]
}
Smart contract events only​
For smart contract events (logs) you select Contract interactions (logs) and Event Emittance in admin interface when you create or update a Steam. After that you have to provide an ABI and to select at least a topic from the list of topics from that ABI. If you are using the swagger directly or the SDK you have to set includeContractLogs to true and to provide an ABI and topic.
{
"confirmed": false,
"chainId": "0x1",
"abi": [
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"name": "reserve0",
"type": "uint112"
},
{
"indexed": false,
"name": "reserve1",
"type": "uint112"
}
],
"name": "Sync",
"type": "event"
}
],
"streamId": "6378fe38-54c7-4816-8d61-fca8e128e260",
"tag": "test_events",
"retries": 1,
"block": {
"number": "15984246",
"hash": "0x7f8d8285b572a60f6a14d5f1dcbd40e487ccffd9ec78f8dfbccb49aa191fbb95",
"timestamp": "1668621827"
},
"logs": [
{
"logIndex": "320",
"transactionHash": "0xf1682fa49b83689093b467ac6937785102895fc3ba418624c28d04f9af6e5e2b",
"address": "0x4cd36d6f32586177e36179a810595a33163a20bf",
"data": "0x00000000000000000000000000000000000000000000944ad388817e590ab6070000000000000000000000000000000000000000000000000000008a602de18e",
"topic0": "0x1c411e9a96e071241c2f21f7726b17ae89e3cab4c78be50e062b03a9fffbbad1",
"topic1": null,
"topic2": null,
"topic3": null
}
],
"txs": [],
"txsInternal": [],
"erc20Transfers": [],
"erc20Approvals": [],
"nftApprovals": {
"ERC1155": [],
"ERC721": []
},
"nftTransfers": []
}
Internal Transactions​
For internal transactions you select Internal Transactions (txsInternal) in Admin interface when you create or update a Stream. Or you can set includeInternalTxs to true if you are using the swagger interface directly or the SDK.
{
"confirmed": false,
"chainId": "0x1",
"abi": [],
"streamId": "c28d9e2e-ae9d-4fe6-9fc0-5fcde2dcdd17",
"tag": "internal transactions",
"retries": 0,
"block": {
"number": "15988462",
"hash": "0xa4520ca85758374d05c31f6e6869f081997daa6e6b18449d49cfac4558f9e7f8",
"timestamp": "1668672659"
},
"logs": [],
"txs": [],
"txsInternal": [
{
"from": "0x1111111254eeb25477b68fb85ed929f73a960582",
"to": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
"value": "11000000000000000",
"gas": "117885",
"transactionHash": "0x0e5c3114c0ee7d29cca17aa0b8e790c4d7d25b4789bd14150f113956b5ce94de"
}
],
"erc20Transfers": [],
"erc20Approvals": [],
"nftApprovals": {
"ERC1155": [],
"ERC721": []
},
"nftTransfers": []
}