Standard Ethereum JSON-RPC Methods (Supported by Shardeum)

web3_clientVersion

Returns the current client version. Parameters

None

Returns

result (string): The current client version.

Example Implementation in JS:

async function getClientVersion() {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'web3_clientVersion',
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

web3_sha3

Returns Keccak-256 (not the standardized SHA3-256) of the given data. Parameters

data (string): The data in hexadecimal form to convert into a SHA3 hash.

Returns

result (string): The SHA3 result of the given string.

Example Implementation in JS:

async function sha3(data) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'web3_sha3',
      params: [data],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const result = await res.json();
  if (result.error) throw new Error(result.error.message);
  return result.result;
}

net_version

Returns the current network id. Parameters

None

Returns

result (string): The current network id.

Example Implementation in JS:

async function getNetworkId() {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'net_version',
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

net_listening

Returns true if client is actively listening for network connections. Parameters

None

Returns

result (boolean): true when listening, otherwise false.

Example Implementation in JS:

async function isListening() {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'net_listening',
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_chainId

Returns the chain ID used for signing replay-protected transactions. Parameters

None

Returns

result (string): Hexadecimal value as a string representing the integer of the current chain id.

Example Implementation in JS:

async function getChainId() {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_chainId',
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_blockNumber

Returns the number of most recent block. Parameters

None

Returns

result (string): The number of the most recent block.

Example Implementation in JS:

async function getBlockNumber() {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_blockNumber',
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getBalance

Returns the balance of the account of given address. Parameters

address (string): The address to check for balance.
QUANTITY|TAG (string): An integer block number, or the string “latest”/“earliest”.

Returns

result (string): An integer of the current balance in wei (hex string).

Example Implementation in JS:

async function getBalanceOf(address) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getBalance',
      params: [address, 'latest'],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return ethers.formatEther(data.result); // Convert Wei to SHM
}

eth_getStorageAt

Returns the value from a storage position at a given address. Parameters

address (string): The address of the storage.
position (string): The position in the storage.
QUANTITY|TAG (string): An integer block number, or the string “latest”/“earliest”.

Returns

result (string): The value at the given storage position.

Example Implementation in JS:

async function getStorageAt(address, position) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getStorageAt',
      params: [address, position, 'latest'],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getTransactionCount

Returns the number of transactions sent from an address. Parameters

address (string): The address to check for transaction count.
QUANTITY|TAG (string): An integer block number, or the string “latest”/“earliest”.

Returns

result (string): The number of transactions sent from the given address.

Example Implementation in JS:

async function getTransactionCount(address) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getTransactionCount',
      params: [address, 'latest'],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getBlockTransactionCountByHash

Returns the number of transactions in a block from a block matching the given block hash. Parameters

blockHash (string): The hash of the block.

Returns

result (string): The number of transactions in the block.

Example Implementation in JS:

async function getBlockTransactionCountByHash(blockHash) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getBlockTransactionCountByHash',
      params: [blockHash],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getBlockTransactionCountByNumber

Returns the number of transactions in a block matching the given block number. Parameters

blockNumber (string): The block number.

Returns

result (string): The number of transactions in the block.

Example Implementation in JS:

async function getBlockTransactionCountByNumber(blockNumber) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getBlockTransactionCountByNumber',
      params: [blockNumber],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_signTransaction

Returns a signed transaction. Parameters

transaction (object): The transaction to sign.

Returns

result (string): The signed transaction.

Example Implementation in JS:

async function signTransaction(transaction) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_signTransaction',
      params: [transaction],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_sendTransaction

Sends a transaction to the network. Parameters

transaction (object): The transaction to send.

Returns

result (string): The transaction hash.

Example Implementation in JS:

async function sendTransaction(transaction) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_sendTransaction',
      params: [transaction],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_sendRawTransaction

Sends a raw transaction to the network. Parameters

rawTransaction (string): The raw transaction data.

Returns

result (string): The transaction hash.

Example Implementation in JS:

async function sendRawTransaction(rawTransaction) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_sendRawTransaction',
      params: [rawTransaction],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_subscribe

Subscribes to a new block header or a new pending transaction. Parameters

subscriptionType (string): The type of subscription (“newHeads” or “newPendingTransactions”).

Returns

result (string): The subscription ID.

Example Implementation in JS:

async function subscribe(subscriptionType) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_subscribe',
      params: [subscriptionType],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_estimateGas

Returns an estimate of how much gas is necessary to allow a transaction to complete. Parameters

transaction (object): The transaction to estimate gas for.

Returns

result (string): The estimated gas.

Example Implementation in JS:

async function estimateGas(transaction) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_estimateGas',
      params: [transaction],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getBlockByHash

Returns information about a block by hash. Parameters

blockHash (string): The hash of the block.

Returns

result (object): Block information object.

Example Implementation in JS:

async function getBlockByHash(blockHash) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getBlockByHash',
      params: [blockHash],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getBlockByNumber

Returns information about a block by number. Parameters

blockNumber (string): The block number.

Returns

result (object): Block information object.

Example Implementation in JS:

async function getBlockByNumber(blockNumber) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getBlockByNumber',
      params: [blockNumber],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getTransactionByHash

Returns the information about a transaction requested by transaction hash. Parameters

txHash (string): The hash of a transaction.

Returns

result (object): Transaction details object.

Example Implementation in JS:

async function getTransactionByHash(txHash) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getTransactionByHash',
      params: [txHash],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

eth_getTransactionReceipt

Returns the receipt of a transaction by transaction hash. Parameters

txHash (string): The hash of the transaction.

Returns

result (object): Transaction receipt object.

Example Implementation in JS:

async function getTransactionReceipt(txHash) {
  const res = await fetch('https://api-testnet.shardeum.org', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      method: 'eth_getTransactionReceipt',
      params: [txHash],
      id: 1,
      jsonrpc: '2.0'
    })
  });
  const data = await res.json();
  if (data.error) throw new Error(data.error.message);
  return data.result;
}

​web3_clientVersion

​web3_sha3

​net_version

​net_listening

​eth_chainId

​eth_blockNumber

​eth_getBalance

​eth_getStorageAt

​eth_getTransactionCount

​eth_getBlockTransactionCountByHash

​eth_getBlockTransactionCountByNumber

​eth_signTransaction

​eth_sendTransaction

​eth_sendRawTransaction

​eth_subscribe

​eth_estimateGas

​eth_getBlockByHash

​eth_getBlockByNumber

​eth_getTransactionByHash

​eth_getTransactionReceipt

web3_clientVersion

web3_sha3

net_version

net_listening

eth_chainId

eth_blockNumber

eth_getBalance

eth_getStorageAt

eth_getTransactionCount

eth_getBlockTransactionCountByHash

eth_getBlockTransactionCountByNumber

eth_signTransaction

eth_sendTransaction

eth_sendRawTransaction

eth_subscribe

eth_estimateGas

eth_getBlockByHash

eth_getBlockByNumber

eth_getTransactionByHash

eth_getTransactionReceipt