Ethereum API

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JSON-RPC API Methods

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1. Web3 Namespace

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web3_clientVersion

• Description: Returns the current client version.
• Parameters: None
• Returns: String - Client version
• Example:
  {
    "jsonrpc": "2.0",
    "method": "web3_clientVersion",
    "params": [],
    "id": 1
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": "Geth/v1.9.25-stable-..."
  }
  

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web3_sha3

• Description: Returns the Keccak-256 (SHA3) of the given data.
• Parameters: String - Data to be hashed
• Returns: Data - Keccak-256 hash of the input data
• Example:
  {
    "jsonrpc": "2.0",
    "method": "web3_sha3",
    "params": ["0x68656c6c6f20776f726c64"],
    "id": 1
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x47173285a8d730..."
  }
  

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2. Net Namespace

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net_version

• Description: Returns the current network ID.
• Parameters: None
• Returns: String - Network ID
• Example:
  {
    "jsonrpc": "2.0",
    "method": "net_version",
    "params": [],
    "id": 67
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 67,
    "result": "1"
  }
  

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net_peerCount

• Description: Returns the number of peers currently connected to the client.
• Parameters: None
• Returns: Quantity - Number of connected peers
• Example:
  {
    "jsonrpc": "2.0",
    "method": "net_peerCount",
    "params": [],
    "id": 74
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 74,
    "result": "0x2"
  }
  

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net_listening

• Description: Returns true if the client is actively listening for network connections.
• Parameters: None
• Returns: Boolean - Listening status
• Example:
  {
    "jsonrpc": "2.0",
    "method": "net_listening",
    "params": [],
    "id": 67
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 67,
    "result": true
  }
  

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3. Eth Namespace

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eth_protocolVersion

• Description: Returns the current Ethereum protocol version.
• Parameters: None
• Returns: String - Protocol version
• Example:
  {
    "jsonrpc": "2.0",
    "method": "eth_protocolVersion",
    "params": [],
    "id": 67
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 67,
    "result": "0x41"
  }
  

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eth_syncing

• Description: Returns an object with data about the sync status or false.
• Parameters: None
• Returns: Boolean or Object - Sync status
• Example:
  {
    "jsonrpc": "2.0",
    "method": "eth_syncing",
    "params": [],
    "id": 1
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
      "startingBlock": "0x384",
      "currentBlock": "0x386",
      "highestBlock": "0x454"
    }
  }
  

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eth_gasPrice

• Description: Returns the current price per gas in wei.
• Parameters: None
• Returns: Quantity - Gas price in wei
• Example:
  {
    "jsonrpc": "2.0",
    "method": "eth_gasPrice",
    "params": [],
    "id": 73
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 73,
    "result": "0x09184e72a000"
  }
  

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eth_blockNumber

• Description: Returns the number of the most recent block.
• Parameters: None
• Returns: Quantity - Block number
• Example:
  {
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": [],
    "id": 83
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 83,
    "result": "0x4b7"
  }
  

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eth_getBlockByNumber

• Description: Returns information about a block by block number.
• Parameters:
  • String - Block number or one of the string tags latest, earliest, pending
  • Boolean - If true it returns the full transaction objects, if false only the hashes of the transactions
• Returns: Object - Block information
• Example:
  {
    "jsonrpc": "2.0",
    "method": "eth_getBlockByNumber",
    "params": [
      "0x1b4",
      true
    ],
    "id": 1
  }
  
  Response:
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": {
      "number": "0x1b4",
      "hash": "0x1234...",
      "parentHash": "0x5678...",
      "nonce": "0x0000000000000000",
      "sha3Uncles": "0x1dcc4...",
      "logsBloom": "0x0000...",
      "transactionsRoot": "0x56e8...",
      "stateRoot": "0x7b3e...",
      "receiptsRoot": "0x56e8...",
      "miner": "0x0000000000000000000000000000000000000000",
      "difficulty": "0x027f07",
      "totalDifficulty": "0x027f07",
      "extraData": "0x00",
      "size": "0x027f07",
      "gasLimit": "0x9f759",
      "gasUsed": "0x9f759",
      "timestamp": "0x54e34e8e",
      "transactions": [{
        "hash": "0x1234...",
        "nonce": "0x15",
        "blockHash": "0x1234...",
        "blockNumber": "0x1b4",
        "transactionIndex": "0x1",
        "from": "0x1234...",
        "to": "0x5678...",
        "value": "0x1",
        "gas": "0x5208",
        "gasPrice": "0x3b9aca00",
        "input": "0x"
      }],
      "uncles": []
    }
  }
  

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eth_getTransactionByHash

• Description: Retrieves detailed information about a transaction specified by its hash.
• Parameters:
  • Hash (String): The transaction hash to retrieve, represented as a hexadecimal string.
• Returns:
  • Object: An object containing the following fields about the transaction:
    • blockHash (String): The hash of the block where the transaction is included.
    • blockNumber (String): The number of the block where the transaction is included.
    • from (String): The address of the sender of the transaction.
    • gas (String): The amount of gas used by the transaction.
    • gasPrice (String): The gas price in wei used for each unit of gas.
    • hash (String): The transaction hash.
    • input (String): The input data of the transaction, typically used for invoking smart contracts.
    • nonce (String): The nonce of the sender’s account.
    • to (String): The address of the receiver of the transaction. It is empty if the transaction is a contract creation.
    • transactionIndex (String): The index of the transaction within the block.
    • value (String): The amount of Ether transferred in the transaction, represented in wei.
• Example:

{
  "jsonrpc": "2.0",
  "method": "eth_getTransactionByHash",
  "params": [
    "0x4bc7f80482d38e6ee3e48e5d46697e66b5d18909a0c7f59d6cfa4bc5f77c6334"
  ],
  "id": 1
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "blockHash": "0x6fd9c2d0aef8cbf49d56a0d8108d0c6f7aaab33fa47c287b18a8e0fdd9f1a95b",
    "blockNumber": "0x5BAD55",
    "from": "0xc94770007dda54cF92009BFF0dE90c06F603a09f",
    "gas": "0xc350",
    "gasPrice": "0x4A817C800",
    "hash": "0x4bc7f80482d38e6ee3e48e5d46697e66b5d18909a0c7f59d6cfa4bc5f77c6334",
    "input": "0x68656c6c6f21",
    "nonce": "0x15",
    "to": "0x5c504ed432cb51138bcf08aa2f8622e54f03c2b4",
    "transactionIndex": "0x0",
    "value": "0x7f110"
  }
}