Data Availability Layer API (DAL)

Pull-based oracle submission using Data Availability Layer API

The on-chain price data can be updated on-demand by a user through the pull-based oracle. Off-chain price data are updated at sub-second intervals. Users with valid API key can access and submit the latest price data on-chain. The price data can be either accessed through REST API or WebSocket API.

The DAL API requires the X-API-Key header. Please contact us to receive a valid API key.

Basic Return Types

Property	Type	Explanation
symbol	string	symbol name
value	string	price value
aggregateTime	string	timestamp value
proof	string	proof hexstring
feedHash	string	feed hash hexstring
decimals	string	decimals

Rest API

• Testnet (REST): https://dal.baobab.orakl.network

• Mainnet (REST): https://dal.cypress.orakl.network

GET /symbols

returns supported symbols

Example Request

curl --location --request GET 'https://dal.baobab.orakl.network/symbols' \
--header 'X-API-Key: $API_KEY' \
--header 'Content-Type: application/json'

Example Response

[
"WAVES-KRW",
"BTC-USDT",
"CHF-USD",
"DAI-USDT",
"JOY-USDT",
"PAXG-USDT",
"GBP-USD",
"WEMIX-USDT",
"ATOM-USDT",
"DOGE-USDT",
"KSP-KRW",
"LTC-USDT",
"TRX-USDT",
"EUR-USD",
"JPY-USD",
"MNR-KRW",
"USDC-USDT",
"XRP-KRW",
"BNB-USDT",
"ETH-KRW",
"ETH-USDT",
"MBX-KRW",
"PER-KLAY",
"BLAST-KRW",
"BTC-KRW",
"DOT-USDT",
"FTM-USDT",
"ZRO-KRW",
"USDT-KRW",
"XRP-USDT",
"AVAX-USDT",
"BORA-KRW",
"KRW-USD",
"SOL-USDT",
"UNI-USDT",
"PEPE-USDT",
"SHIB-USDT",
"SOL-KRW",
"ADA-USDT",
"AKT-KRW",
"KLAY-USDT",
"MATIC-USDT",
"ONDO-KRW"
]

GET /latest-data-feeds/all

returns latest submission parameters for all supported pairs

Example Request

curl --location --request GET 'https://dal.baobab.orakl.network/latest-data-feeds/all' \
--header 'X-API-Key: $API_KEY' \
--header 'Content-Type: application/json'

Example Response

[
    {
        "symbol": "BTC-USDT",
        "value": "6426575817343",
        "aggregateTime": "1721886857",
        "proof": "0x6cb90489dddc93c376425355cb497353695e53d91a7d61c3f1e122b1e5c0e2367dc95d36f40d5960784250008ed4a9f18d75b189f0d72eb9e2564e0a05ad374a1c",
        "feedHash": "0xa92bcb5bc51aa5535ed0cc3f522992dd9a6fb2e8dd6dcf484705d93eb3cd167a",
        "decimals": "8"
    },
    {
        "symbol": "ETH-USDT",
        "value": "318659264245",
        "aggregateTime": "1721886857",
        "proof": "0xd7c13dd825dd112de3ce52f704514d60c41f6d34bea3be13fc44a46394376ebd3947bdcb8d8dec9ae2959d1992b99220d4bf60988c7482b9ee98d3079199096b1b",
        "feedHash": "0x7020b52841bb268cbc78137a54d4bf1f5305eed1039fb5d003ba95b8ededc46c",
        "decimals": "8"
    }
    ...
]

GET /latest-data-feeds/{symbol,symbol,...}

returns the latest submission parameters for requested pairs

Example Request

curl --location --request GET 'https://dal.baobab.orakl.network/latest-data-feeds/all' \
--header 'X-API-Key: $API_KEY' \
--header 'Content-Type: application/json'

Example Response

[
    {
        "symbol": "BTC-USDT",
        "value": "6426575817343",
        "aggregateTime": "1721886857",
        "proof": "0x6cb90489dddc93c376425355cb497353695e53d91a7d61c3f1e122b1e5c0e2367dc95d36f40d5960784250008ed4a9f18d75b189f0d72eb9e2564e0a05ad374a1c",
        "feedHash": "0xa92bcb5bc51aa5535ed0cc3f522992dd9a6fb2e8dd6dcf484705d93eb3cd167a",
        "decimals": "8"
    },
    {
        "symbol": "ETH-USDT",
        "value": "318659264245",
        "aggregateTime": "1721886857",
        "proof": "0xd7c13dd825dd112de3ce52f704514d60c41f6d34bea3be13fc44a46394376ebd3947bdcb8d8dec9ae2959d1992b99220d4bf60988c7482b9ee98d3079199096b1b",
        "feedHash": "0x7020b52841bb268cbc78137a54d4bf1f5305eed1039fb5d003ba95b8ededc46c",
        "decimals": "8"
    }
    ...
]

GET /latest-data-feeds/transpose/all

returns latest submission paramters for all pairs in transpose format

Example Request

curl --location 'https://dal.baobab.orakl.network/latest-data-feeds/transpose/all' \
--header 'X-API-Key: $API_KEY'

Example Response

{
    "symbols": [
        "ADA-USDT",
        "BTC-USDT",
        ...
    ],
    "values": [
        "39386169",
        "6416315907599",
        ...
    ],
    "aggregateTimes": [
        "1721888065",
        "1721888065",
        ...
    ],
    "proofs": [
        "0xb2257cad024889288e0a047d8ab55e0553a9ccafbfbb3ada10392abc2c2bc24c0398189260c4141a3e39b1361445d3d394b2fe0b953b97eaabe9c081dff4c4441b",
        "0x0ad8a61c99bd5b911b37c98d5424c02f7c22afad5b18a434c9e4132a4542da9a2e499b26b75e6e256bc1d77301e5f9edeb62967c3180db2b7b3dbf2c0e8c0c6c1c",
        ...
    ],
    "feedHashes": [
        "0x5f741f7995dc7d3a3a89dd2daccc6c019033c69204605aabf2739c3aa5ec8a62",
        "0xa92bcb5bc51aa5535ed0cc3f522992dd9a6fb2e8dd6dcf484705d93eb3cd167a",
        ...
    ],
    "decimals": [
        "8",
        "8",
        ...
    ]
}

Get /latest-data-feeds/transpose/{symbol, symbol..}

returns latest submission paramters for certain pairs in transpose format

Example Request

curl --location 'https://dal.baobab.orakl.network/latest-data-feeds/transpose/ADA-USDT,BTC-USDT' \
--header 'X-API-Key: $API_KEY'

Example Response

{
    "symbols": [
        "ADA-USDT",
        "BTC-USDT"
    ],
    "values": [
        "39386169",
        "6416315907599"
    ],
    "aggregateTimes": [
        "1721888065",
        "1721888065"
    ],
    "proofs": [
        "0xb2257cad024889288e0a047d8ab55e0553a9ccafbfbb3ada10392abc2c2bc24c0398189260c4141a3e39b1361445d3d394b2fe0b953b97eaabe9c081dff4c4441b",
        "0x0ad8a61c99bd5b911b37c98d5424c02f7c22afad5b18a434c9e4132a4542da9a2e499b26b75e6e256bc1d77301e5f9edeb62967c3180db2b7b3dbf2c0e8c0c6c1c"
    ],
    "feedHashes": [
        "0x5f741f7995dc7d3a3a89dd2daccc6c019033c69204605aabf2739c3aa5ec8a62",
        "0xa92bcb5bc51aa5535ed0cc3f522992dd9a6fb2e8dd6dcf484705d93eb3cd167a"
    ],
    "decimals": [
        "8",
        "8"
    ]
}

WebSocket API

Testnet (WS): ws://dal.baobab.orakl.network/ws

Mainnet (WS): ws://dal.cypress.orakl.network/ws

Connect and Request /ws

subscribes and pushes price feeds

Example Request

# connect
websocat ws://dal.baobab.orakl.network/ws -H "X-API-Key: $API_KEY"
# subscribe
{
  "method": "SUBSCRIBE",
  "params": [
    "submission@BTC-USDT"
  ]
}

Example Response

{
        "symbol": "BTC-USDT",
        "value": "6426575817343",
        "aggregateTime": "1721886857",
        "proof": "0x6cb90489dddc93c376425355cb497353695e53d91a7d61c3f1e122b1e5c0e2367dc95d36f40d5960784250008ed4a9f18d75b189f0d72eb9e2564e0a05ad374a1c",
        "feedHash": "0xa92bcb5bc51aa5535ed0cc3f522992dd9a6fb2e8dd6dcf484705d93eb3cd167a",
        "decimals": "8"
}

On-chain Price Data Submission

The price data is submitted on-chain through SubmissionProxy contract. The contract address can be found at JSON configuration.

submit function

Submits in bulk without strict checks. It will silently skip invalid submissions and submit only valid submissions.

Signature

function submit(
    bytes32[] calldata _feedHashes,
    int256[] calldata _answers,
    uint256[] calldata _timestamps,
    bytes[] calldata _proofs
)

ABI

[
  {
    "type": "function",
    "name": "submit",
    "inputs": [
      {
        "name": "_feedHashes",
        "type": "bytes32[]",
        "internalType": "bytes32[]"
      },
      {
        "name": "_answers",
        "type": "int256[]",
        "internalType": "int256[]"
      },
      {
        "name": "_timestamps",
        "type": "uint256[]",
        "internalType": "uint256[]"
      },
      {
        "name": "_proofs",
        "type": "bytes[]",
        "internalType": "bytes[]"
      }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  }
]

submitStrict function

Submits in bulk with strict checks. If one of the submission entry fails, the whole tx will fail with error

• signature

function submitStrict(
        bytes32[] calldata _feedHashes,
        int256[] calldata _answers,
        uint256[] calldata _timestamps,
        bytes[] calldata _proofs
    )

• abi

[
  {
    "type": "function",
    "name": "submitStrict",
    "inputs": [
      {
        "name": "_feedHashes",
        "type": "bytes32[]",
        "internalType": "bytes32[]"
      },
      { "name": "_answers", "type": "int256[]", "internalType": "int256[]" },
      {
        "name": "_timestamps",
        "type": "uint256[]",
        "internalType": "uint256[]"
      },
      { "name": "_proofs", "type": "bytes[]", "internalType": "bytes[]" }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  }
]

submitSingle function

Submits single entry with checks.

• signature

function submitSingle(bytes32 _feedHash, int256 _answer, uint256 _timestamp, bytes calldata _proof)

• abi

[
  {
    "type": "function",
    "name": "submitSingle",
    "inputs": [
      { "name": "_feedHash", "type": "bytes32", "internalType": "bytes32" },
      { "name": "_answer", "type": "int256", "internalType": "int256" },
      { "name": "_timestamp", "type": "uint256", "internalType": "uint256" },
      { "name": "_proof", "type": "bytes", "internalType": "bytes" }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  }
]

submitWithoutSupersedValidation function

Submit a batch of answers to multiple feeds. The answers are ignored if they have been superseded. If any of the answers do not meet the rest of required conditions the whole batch is reverted.

• signature

    function submitWithoutSupersedValidation(
        bytes32[] calldata _feedHashes,
        int256[] calldata _answers,
        uint256[] calldata _timestamps,
        bytes[] calldata _proofs
    )

• abi

[
  {
    "type": "function",
    "name": "submitWithoutSupersedValidation",
    "inputs": [
      {
        "name": "_feedHashes",
        "type": "bytes32[]",
        "internalType": "bytes32[]"
      },
      { "name": "_answers", "type": "int256[]", "internalType": "int256[]" },
      {
        "name": "_timestamps",
        "type": "uint256[]",
        "internalType": "uint256[]"
      },
      { "name": "_proofs", "type": "bytes[]", "internalType": "bytes[]" }
    ],
    "outputs": [],
    "stateMutability": "nonpayable"
  }
]

submitSingleWithoutSupersedValidation function

Submit a single submission to a feed. The submission is ignored if it has been superseded. If the submission does not meet the rest of required conditions the submission is reverted.

• signature

function submitSingleWithoutSupersedValidation(bytes32 _feedHash, int256 _answer, uint256 _timestamp, bytes calldata _proof)

• abi

{
  "type": "function",
  "name": "submitSingleWithoutSupersedValidation",
  "inputs": [
    { "name": "_feedHash", "type": "bytes32", "internalType": "bytes32" },
    { "name": "_answer", "type": "int256", "internalType": "int256" },
    { "name": "_timestamp", "type": "uint256", "internalType": "uint256" },
    { "name": "_proof", "type": "bytes", "internalType": "bytes" }
  ],
  "outputs": [],
  "stateMutability": "nonpayable"
}