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eSpace - Execution API

eth_accounts

Returns a list of addresses owned by client.

This method will use 10 Compute Units.

Reference: Here

Parameters

None

Returns

array of data - 20 Bytes - addresses owned by the client. As Validation Cloud does not store private keys, this method is expected to return an empty response.

// Result
{
	"jsonrpc": "2.0",
	"result": [],
	"id": 1
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}'

eth_blockNumber

Returns the number of most recent block.

This method will use 10 .

Reference:

Parameters

None

Returns

INTEGER - Value of the current block number the client is on

eth_call

Executes a new message call immediately without creating a transaction on the block chain.

This method will use 30 Compute Units.

Reference: Here

Parameters

Object - The transaction call object

from - [optional] String of the address the transaction is sent from.

to - String of the address the transaction is directed to.

gas - [optional] Integer of the gas provided for the transaction execution.

gasprice - [optional] Integer of the gasPrice used for each paid gas encoded as a hexadecimal.

value - [optional] Integer of the value sent with this transaction encoded as a hexadecimal.

data - [optional] String of the hash of the method signature and encoded parameters. For more information, see the Contract ABI description in the Solidity documentation.

QUANTITY | TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter

Returns

data - hex value of the executed call or contract

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x"
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"method":"eth_call","params":[{"from":null,"to":"0x6b175474e89094c44da98b954eedeac495271d0f","data":"0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"}, "latest"],"id":1,"jsonrpc":"2.0"}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"method":"eth_call","params":[{"from":null,"to":"0x6b175474e89094c44da98b954eedeac495271d0f","data":"0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"}, "latest"],"id":1,"jsonrpc":"2.0"}'

eth_chainId

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

This method will use 5 Compute Units.

Reference: Here

Parameters

None

Returns

chainId, hexadecimal value as a string representing the integer of the current chain id.

// Result
{
  "id":67,
  "jsonrpc": "2.0",
  "result": "0x1"
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":67}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":67}'

eth_estimateGas

Generates and returns an estimate of how much gas is necessary to allow the transaction to complete.

This method will use 100 Compute Units.

Reference: Here

Parameters

from - [optional] String of the address the transaction is sent from.

to - [optional] String of the address the transaction is directed to.

gas - [optional] Integer of the gas provided for the transaction execution.

gasprice - [optional] Integer of the gasPrice used for each paid gas encoded as a hexadecimal.

value - [optional] Integer of the value sent with this transaction encoded as a hexadecimal.

data - [optional] String of the hash of the method signature and encoded parameters. For more information, see the Contract ABI description in the Solidity documentation.

Returns

String - hex string value representing an integer of the amount of gas units used.

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x5208" // 21000
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{see above}],"id":1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{see above}],"id":1}'

eth_gasPrice

Returns the current price per gas in wei.

This method will use 20 .

Reference:

Parameters

None

Returns

String - hex string value representing an integer of the current price per gas in WEI.

eth_getBalance

Returns the balance of the account of given address.

This method will use 20 .

Reference:

Parameters

DATA, 20 Bytes - address to check for balance.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the

Returns

INTEGER - Hex value representing integer of the current balance in WEI.

eth_getBlockByHash

Returns information about a block by hash.

This method will use 30 .

Reference:

Parameters

DATA, 32 Bytes - Hash of a block.
Boolean - If true it returns the full transaction objects, if false only the hashes of the transactions are returned.

Returns

Object - A block object, or null when no block was found:

number: QUANTITY - the block number. null when its pending block.
hash: DATA, 32 Bytes - hash of the block. null when its pending block.
parentHash: DATA, 32 Bytes - hash of the parent block.
nonce: DATA, 8 Bytes - hash of the generated proof-of-work. null when its pending block.
sha3Uncles: DATA, 32 Bytes - SHA3 of the uncles data in the block.
logsBloom: DATA, 256 Bytes - the bloom filter for the logs of the block. null when its pending block.
transactionsRoot: DATA, 32 Bytes - the root of the transaction trie of the block.
stateRoot: DATA, 32 Bytes - the root of the final state trie of the block.
receiptsRoot: DATA, 32 Bytes - the root of the receipts trie of the block.
miner: DATA, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
difficulty: QUANTITY - integer of the difficulty for this block.
totalDifficulty: QUANTITY - integer of the total difficulty of the chain until this block.
extraData: DATA - the "extra data" field of this block.
size: QUANTITY - integer the size of this block in bytes.
gasLimit: QUANTITY - the maximum gas allowed in this block.
gasUsed: QUANTITY - the total used gas by all transactions in this block.
timestamp: QUANTITY - the unix timestamp for when the block was collated.
transactions: Array - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
uncles: Array - Array of uncle hashes.

eth_getBlockByNumber

Returns information about a block by block number.

This method will use 20 .

Reference:

Parameters

QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the .
Boolean - If true it returns the full transaction objects, if false only the hashes of the transactions.

Returns

Object - A block object, or null when no block was found:

number: QUANTITY - the block number. null when its pending block.
hash: DATA, 32 Bytes - hash of the block. null when its pending block.
parentHash: DATA, 32 Bytes - hash of the parent block.
nonce: DATA, 8 Bytes - hash of the generated proof-of-work. null when its pending block.
sha3Uncles: DATA, 32 Bytes - SHA3 of the uncles data in the block.
logsBloom: DATA, 256 Bytes - the bloom filter for the logs of the block. null when its pending block.
transactionsRoot: DATA, 32 Bytes - the root of the transaction trie of the block.
stateRoot: DATA, 32 Bytes - the root of the final state trie of the block.
receiptsRoot: DATA, 32 Bytes - the root of the receipts trie of the block.
miner: DATA, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
difficulty: QUANTITY - integer of the difficulty for this block.
totalDifficulty: QUANTITY - integer of the total difficulty of the chain until this block.
extraData: DATA - the "extra data" field of this block.
size: QUANTITY - integer the size of this block in bytes.
gasLimit: QUANTITY - the maximum gas allowed in this block.
gasUsed: QUANTITY - the total used gas by all transactions in this block.
timestamp: QUANTITY - the unix timestamp for when the block was collated.
transactions: Array - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
uncles: Array - Array of uncle hashes.

eth_getBlockTransactionCountByHash

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

This method will use 20 Compute Units.

Reference: Here

Parameters

DATA, 32 Bytes - hash of a block

params: ["0xf6e5d0e39d2c922c6772abba968eec0dbf2d82d7d26ec2342fb11fb7c5118548"]

Returns

QUANTITY - integer of the number of transactions in this block.

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0xb" // 11
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByHash","params":["0xf6e5d0e39d2c922c6772abba968eec0dbf2d82d7d26ec2342fb11fb7c5118548"],"id":1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getBlockTransactionCountByHash","params":["0xb4e54eb9c573ebd122be4aa4625082c414d16355bab67647dd9668c9389fb527"],"id":1}'

eth_getBlockTransactionCountByNumber

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

This method will use 20 .

Reference:

Parameters

QUANTITY|TAG - integer of a block number, or the string "earliest", "latest" or "pending", as in the .

Returns

QUANTITY - integer of the number of transactions in this block.

eth_getCode

Returns code at a given address.

This method will use 20 .

Reference:

Parameters

DATA, 20 Bytes - address.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the

Returns

DATA - the code from the given address.

eth_getFilterChanges

Polling method for a filter, which returns an array of logs which occurred since last poll.

This method will use 20 Compute Units.

Reference: Here

Parameters

QUANTITY - the filter id.

params: 
[
  "0x16", // 22
]

Returns

Array - Array of log objects, or an empty array if nothing has changed since last poll.

For filters created with eth_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].
For filters created with eth_newPendingTransactionFilter the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].
For filters created with eth_newFilter logs are objects with following params:
- removed: TAG - true when the log was removed, due to a chain reorganization. false if its a valid log.
- logIndex: QUANTITY - integer of the log index position in the block. null when its pending log.
- transactionIndex: QUANTITY - integer of the transactions index position log was created from. null when its pending log.
- transactionHash: DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.
- blockHash: DATA, 32 Bytes - hash of the block where this log was in. null when its pending. null when its pending log.
- blockNumber: QUANTITY - the block number where this log was in. null when its pending. null when its pending log.
- address: DATA, 20 Bytes - address from which this log originated.
- data: DATA - contains one or more 32 Bytes non-indexed arguments of the log.
- topics: Array of DATA - Array of 0 to 4 32 Bytes DATA of indexed log arguments. (In solidity: The first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), except you declared the event with the anonymous specifier.)

// Result
{
  "id":1,
  "jsonrpc":"2.0",
  "result": [{
    "logIndex": "0x1", // 1
    "blockNumber":"0x1b4", // 436
    "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
    "transactionIndex": "0x0", // 0
    "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
    },{
      ...
    }]
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0x16"],"id":73}'

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getFilterChanges","params":["0x16"],"id":73}'

eth_getFilterLogs

Returns an array of all logs matching filter with given id.

This method will use 70 Compute Units.

Reference: Here

Parameters

QUANTITY - the filter id.

params: 
[
  "0x16", // 22
]

Returns

Array - Array of log objects, or an empty array if nothing has changed since last poll.

For filters created with eth_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].
For filters created with eth_newPendingTransactionFilter the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].
For filters created with eth_newFilter logs are objects with following params:
- removed: TAG - true when the log was removed, due to a chain reorganization. false if its a valid log.
- logIndex: QUANTITY - integer of the log index position in the block. null when its pending log.
- transactionIndex: QUANTITY - integer of the transactions index position log was created from. null when its pending log.
- transactionHash: DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.
- blockHash: DATA, 32 Bytes - hash of the block where this log was in. null when its pending. null when its pending log.
- blockNumber: QUANTITY - the block number where this log was in. null when its pending. null when its pending log.
- address: DATA, 20 Bytes - address from which this log originated.
- data: DATA - contains one or more 32 Bytes non-indexed arguments of the log.
- topics: Array of DATA - Array of 0 to 4 32 Bytes DATA of indexed log arguments. (In solidity: The first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), except you declared the event with the anonymous specifier.)

// Result
{
  "id":1,
  "jsonrpc":"2.0",
  "result": [{
    "logIndex": "0x1", // 1
    "blockNumber":"0x1b4", // 436
    "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
    "transactionIndex": "0x0", // 0
    "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
    },{
      ...
    }]
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getFilterLogs","params":["0x16"],"id":74}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getFilterLogs","params":["0x16"],"id":74}'

eth_getLogs

Returns an array of all logs matching a given filter object.

This method will use 80 Compute Units.

Reference: Here

Parameters

Object - The filter options:

fromBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
toBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block or "pending", "earliest" for not yet mined transactions.
address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics. Topics are order-dependent. Each topic can also be an array of DATA with "or" options.
blockhash: DATA, 32 Bytes - (optional, future) With the addition of EIP-234, blockHash will be a new filter option which restricts the logs returned to the single block with the 32-byte hash blockHash. Using blockHash is equivalent to fromBlock = toBlock = the block number with hash blockHash. If blockHash is present in in the filter criteria, then neither fromBlock nor toBlock are allowed.

params: [
  {
    topics: [
      "0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b",
    ],
  },
]

Returns

See eth_getFilterChanges:

Array - Array of log objects, or an empty array if nothing has changed since last poll.

For filters created with eth_newBlockFilter the return are block hashes (DATA, 32 Bytes), e.g. ["0x3454645634534..."].
For filters created with eth_newPendingTransactionFilter the return are transaction hashes (DATA, 32 Bytes), e.g. ["0x6345343454645..."].
For filters created with eth_newFilter logs are objects with following params:
- removed: TAG - true when the log was removed, due to a chain reorganization. false if its a valid log.
- logIndex: QUANTITY - integer of the log index position in the block. null when its pending log.
- transactionIndex: QUANTITY - integer of the transactions index position log was created from. null when its pending log.
- transactionHash: DATA, 32 Bytes - hash of the transactions this log was created from. null when its pending log.
- blockHash: DATA, 32 Bytes - hash of the block where this log was in. null when its pending. null when its pending log.
- blockNumber: QUANTITY - the block number where this log was in. null when its pending. null when its pending log.
- address: DATA, 20 Bytes - address from which this log originated.
- data: DATA - contains one or more 32 Bytes non-indexed arguments of the log.
- topics: Array of DATA - Array of 0 to 4 32 Bytes DATA of indexed log arguments. (In solidity: The first topic is the hash of the signature of the event (e.g. Deposit(address,bytes32,uint256)), except you declared the event with the anonymous specifier.)

// Result
{
  "id":1,
  "jsonrpc":"2.0",
  "result": [{
    "logIndex": "0x1", // 1
    "blockNumber":"0x1b4", // 436
    "blockHash": "0x8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "transactionHash":  "0xdf829c5a142f1fccd7d8216c5785ac562ff41e2dcfdf5785ac562ff41e2dcf",
    "transactionIndex": "0x0", // 0
    "address": "0x16c5785ac562ff41e2dcfdf829c5a142f1fccd7d",
    "data":"0x0000000000000000000000000000000000000000000000000000000000000000",
    "topics": ["0x59ebeb90bc63057b6515673c3ecf9438e5058bca0f92585014eced636878c9a5"]
    },{
      ...
    }]
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]}],"id":74}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getLogs","params":[{"topics":["0x000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"]}],"id":74}'

eth_getStorageAt

Returns the balance of the account of given address.

This method will use 20 Compute Units.

Reference: Here

Parameters

DATA, 20 Bytes - address of the storage.
QUANTITY - integer of the position in the storage.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the default block parameter

Returns

String - Hex value representing data at this storage position.

// Result
{
  "id":83,
  "jsonrpc": "2.0",
  "result": "0x0000000000000000000000000000000000000000000000000000000000000000" 
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}'

eth_getTransactionByBlockHashAndIndex

Returns information about a transaction by block hash and transaction index position.

This method will use 20 Compute Units.

Reference: Here

Parameters

DATA, 32 Bytes - hash of a block.
QUANTITY - integer of the transaction index position.

params: [
  "0xf6e5d0e39d2c922c6772abba968eec0dbf2d82d7d26ec2342fb11fb7c5118548",
  "0x0", // 0
]

Returns

Object - A transaction object, or null when no transaction was found:

blockHash: DATA, 32 Bytes - hash of the block where this transaction was in. null when its pending.
blockNumber: QUANTITY - block number where this transaction was in. null when its pending.
from: DATA, 20 Bytes - address of the sender.
gas: QUANTITY - gas provided by the sender.
gasPrice: QUANTITY - gas price provided by the sender in Wei.
hash: DATA, 32 Bytes - hash of the transaction.
input: DATA - the data send along with the transaction.
nonce: QUANTITY - the number of transactions made by the sender prior to this one.
to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
transactionIndex: QUANTITY - integer of the transactions index position in the block. null when its pending.
value: QUANTITY - value transferred in Wei.
v: QUANTITY - ECDSA recovery id
r: QUANTITY - ECDSA signature r
s: QUANTITY - ECDSA signature s

// Result
{
  "jsonrpc":"2.0",
  "id":1,
  "result":{
    "blockHash":"0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
    "blockNumber":"0x5daf3b", // 6139707
    "from":"0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
    "gas":"0xc350", // 50000
    "gasPrice":"0x4a817c800", // 20000000000
    "hash":"0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
    "input":"0x68656c6c6f21",
    "nonce":"0x15", // 21
    "to":"0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
    "transactionIndex":"0x41", // 65
    "value":"0xf3dbb76162000", // 4290000000000000
    "v":"0x25", // 37
    "r":"0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
    "s":"0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c"
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockHashAndIndex","params":["0xf6e5d0e39d2c922c6772abba968eec0dbf2d82d7d26ec2342fb11fb7c5118548", "0x0"],"id":1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}'

eth_getTransactionByBlockNumberAndIndex

Returns information about a transaction by block number and transaction index position.

This method will use 20 Compute Units.

Reference: Here

Parameters

QUANTITY|TAG - a block number, or the string "earliest", "latest" or "pending", as in the default block parameter.
QUANTITY - the transaction index position.

params: [
  "0x29c", // 668
  "0x0", // 0
]

Returns

Object - A transaction object, or null when no transaction was found:

blockHash: DATA, 32 Bytes - hash of the block where this transaction was in. null when its pending.
blockNumber: QUANTITY - block number where this transaction was in. null when its pending.
from: DATA, 20 Bytes - address of the sender.
gas: QUANTITY - gas provided by the sender.
gasPrice: QUANTITY - gas price provided by the sender in Wei.
hash: DATA, 32 Bytes - hash of the transaction.
input: DATA - the data send along with the transaction.
nonce: QUANTITY - the number of transactions made by the sender prior to this one.
to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
transactionIndex: QUANTITY - integer of the transactions index position in the block. null when its pending.
value: QUANTITY - value transferred in Wei.
v: QUANTITY - ECDSA recovery id
r: QUANTITY - ECDSA signature r
s: QUANTITY - ECDSA signature s

// Result
{
  "jsonrpc":"2.0",
  "id":1,
  "result":{
    "blockHash":"0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2",
    "blockNumber":"0x5daf3b", // 6139707
    "from":"0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
    "gas":"0xc350", // 50000
    "gasPrice":"0x4a817c800", // 20000000000
    "hash":"0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b",
    "input":"0x68656c6c6f21",
    "nonce":"0x15", // 21
    "to":"0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
    "transactionIndex":"0x41", // 65
    "value":"0xf3dbb76162000", // 4290000000000000
    "v":"0x25", // 37
    "r":"0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea",
    "s":"0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c"
  }

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getTransactionByBlockNumberAndIndex","params":["0x29c", "0x0"],"id":1}'

eth_getTransactionByHash

Returns the information about a transaction requested by transaction hash.

This method will use 20 .

Reference:

Parameters

DATA, 32 Bytes - hash of a transaction

Returns

Object - A transaction object, or null when no transaction was found:

blockHash: DATA, 32 Bytes - hash of the block where this transaction was in. null when its pending.
blockNumber: QUANTITY - block number where this transaction was in. null when its pending.
from: DATA, 20 Bytes - address of the sender.
gas: QUANTITY - gas provided by the sender.
gasPrice: QUANTITY - gas price provided by the sender in Wei.
hash: DATA, 32 Bytes - hash of the transaction.
input: DATA - the data send along with the transaction.
nonce: QUANTITY - the number of transactions made by the sender prior to this one.
to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
transactionIndex: QUANTITY - integer of the transactions index position in the block. null when its pending.
value: QUANTITY - value transferred in Wei.
v: QUANTITY - ECDSA recovery id
r: QUANTITY - ECDSA signature r
s: QUANTITY - ECDSA signature s

eth_getTransactionCount

Returns the number of transactions sent from an address.

This method will use 30 .

Reference:

Parameters

DATA, 20 Bytes - address.
QUANTITY|TAG - integer block number, or the string "latest", "earliest" or "pending", see the

Returns

QUANTITY - String hex value representing integer of the number of transactions sent from this address.

eth_getTransactionReceipt

Returns the receipt of a transaction by transaction hash. Note that the receipt is not available for pending transactions.

This method will use 20 .

Reference:

Parameters

DATA, 32 Bytes - hash of a transaction

Returns

Object - A transaction receipt object, or null when no receipt was found:

transactionHash : DATA, 32 Bytes - hash of the transaction.
transactionIndex: QUANTITY - integer of the transactions index position in the block.
blockHash: DATA, 32 Bytes - hash of the block where this transaction was in.
blockNumber: QUANTITY - block number where this transaction was in.
from: DATA, 20 Bytes - address of the sender.
to: DATA, 20 Bytes - address of the receiver. null when its a contract creation transaction.
cumulativeGasUsed : QUANTITY - The total amount of gas used when this transaction was executed in the block.
effectiveGasPrice : QUANTITY - The sum of the base fee and tip paid per unit of gas.
gasUsed : QUANTITY - The amount of gas used by this specific transaction alone.
contractAddress : DATA, 20 Bytes - The contract address created, if the transaction was a contract creation, otherwise null.
logs: Array - Array of log objects, which this transaction generated.
logsBloom: DATA, 256 Bytes - Bloom filter for light clients to quickly retrieve related logs.
type: DATA - integer of the transaction type, 0x00 for legacy transactions, 0x01 for access list types, 0x02 for dynamic fees. It also returns either :
root : DATA 32 bytes of post-transaction stateroot (pre Byzantium)
status: QUANTITY either 1 (success) or 0 (failure)

eth_getUncleByBlockHashAndIndex

Returns information about a uncle of a block by hash and uncle index position.

This method will use 20 .

Note: There is no concept of uncle (aka ommer) blocks in Conflux. The eth_getUncleByBlockHashAndIndex and eth_getUncleByBlockNumberAndIndex methods will always return null.

Reference:

Parameters

DATA, 32 Bytes - The hash of a block.
QUANTITY - The uncle's index position.

Returns:

Object - A block object, or null when no block was found:

number: QUANTITY - the block number. null when its pending block.
hash: DATA, 32 Bytes - hash of the block. null when its pending block.
parentHash: DATA, 32 Bytes - hash of the parent block.
nonce: DATA, 8 Bytes - hash of the generated proof-of-work. null when its pending block.
sha3Uncles: DATA, 32 Bytes - SHA3 of the uncles data in the block.
logsBloom: DATA, 256 Bytes - the bloom filter for the logs of the block. null when its pending block.
transactionsRoot: DATA, 32 Bytes - the root of the transaction trie of the block.
stateRoot: DATA, 32 Bytes - the root of the final state trie of the block.
receiptsRoot: DATA, 32 Bytes - the root of the receipts trie of the block.
miner: DATA, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
difficulty: QUANTITY - integer of the difficulty for this block.
totalDifficulty: QUANTITY - integer of the total difficulty of the chain until this block.
extraData: DATA - the "extra data" field of this block.
size: QUANTITY - integer the size of this block in bytes.
gasLimit: QUANTITY - the maximum gas allowed in this block.
gasUsed: QUANTITY - the total used gas by all transactions in this block.
timestamp: QUANTITY - the unix timestamp for when the block was collated.
transactions: Array - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
uncles: Array - Array of uncle hashes.

eth_getUncleByBlockNumberAndIndex

Returns information about a uncle of a block by number and uncle index position.

This method will use 20 .

Note: There is no concept of uncle (aka ommer) blocks in Conflux. The eth_getUncleByBlockHashAndIndex and eth_getUncleByBlockNumberAndIndex methods will always return null.

Reference:

Parameters

QUANTITY|TAG - a block number, or the string "earliest", "latest" or "pending", as in the .
QUANTITY - the uncle's index position.

eth_getUncleCountByBlockHash

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

This method will use 20 .

Note: There is no concept of uncle (aka ommer) blocks in Conflux. The eth_getUncleCountByBlockHash and eth_getUncleCountByBlockNumber methods return zero for valid block IDs and null for invalid block IDs.

Reference:

Parameters

DATA, 32 Bytes - hash of a block

Returns

QUANTITY - integer of the number of uncles in this block.

eth_getUncleCountByBlockNumber

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

This method will use 20 .

Reference:

Parameters

QUANTITY|TAG - integer of a block number, or the string "latest", "earliest" or "pending", see the

Returns

QUANTITY - integer of the number of uncles in this block.

eth_newBlockFilter

Creates a filter in the node, to notify when a new block arrives. To check if the state has changed, call .

This method will use 20 .

Reference:

Parameters

None

Returns

QUANTITY - A filter id.

eth_newFilter

Creates a filter object, based on filter options, to notify when the state changes (logs). To check if the state has changed, call .

This method will use 20 .

Reference:

A note on specifying topic filters: Topics are order-dependent. A transaction with a log with topics [A, B] will be matched by the following topic filters:

[] "anything"
[A] "A in first position (and anything after)"
[null, B] "anything in first position AND B in second position (and anything after)"
[A, B] "A in first position AND B in second position (and anything after)"
[[A, B], [A, B]] "(A OR B) in first position AND (A OR B) in second position (and anything after)"

Parameters

Object - The filter options:

fromBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block, "safe" for the latest safe block, "finalized" for the latest finalized block, or "pending", "earliest" for not yet mined transactions.
toBlock: QUANTITY|TAG - (optional, default: "latest") Integer block number, or "latest" for the last mined block, "safe" for the latest safe block, "finalized" for the latest finalized block, or "pending", "earliest" for not yet mined transactions.
address: DATA|Array, 20 Bytes - (optional) Contract address or a list of addresses from which logs should originate.
topics: Array of DATA, - (optional) Array of 32 Bytes DATA topics. Topics are order-dependent. Each topic can also be an array of DATA with "or" options.

Returns

QUANTITY - A filter id.

eth_newPendingTransactionFilter

Creates a filter in the node, to notify when new pending transactions arrive. To check if the state has changed, call .

This method will use 20 .

Reference:

Parameters

None

Returns

QUANTITY - A filter id.

eth_sendRawTransaction

Creates new message call transaction or a contract creation for signed transactions.

This method will use 270 .

Note: eth_sendRawTransaction supports legacy(EIP-155), type-1(EIP-2930) and type-2(EIP-1559) transactions. Type-3 transactions (EIP-4844) transactions are not yet supported.

Reference:

Parameters

DATA, The signed transaction data.

Returns

DATA, 32 Bytes - the transaction hash, or the zero hash if the transaction is not yet available.

Use to get the contract address, after the transaction was mined, when you created a contract.

eth_subscribe

Returns an object with data about the sync status or false.

This method will use 10 .

Reference:

Parameters

subscription name - string - The type of event you want to subscribe to (i.e., newHeads or logs). This method supports the following subscription types:

newHeads - Fires a notification each time a new header is appended to the chain, including chain reorganizations.
logs - Returns logs that are included in new imported blocks and match the given filter criteria.

data - object - (Optional) - Arguments such as an address, multiple addresses, and topics. Note, only logs that are created from these addresses or match the specified topics will return logs.

Returns

result - string - Hex encoded subscription ID. This ID will be attached to all received events and can also be used to cancel the subscription using .

eth_syncing

Returns an object with data about the sync status or false.

This method will use 5 Compute Units.

Reference: Here

Parameters

None

Returns

Object|Boolean, An object with sync status data or FALSE, when not syncing:

startingBlock: QUANTITY - The block at which the import started (will only be reset, after the sync reached his head)
currentBlock: QUANTITY - The current block, same as eth_blockNumber
highestBlock: QUANTITY - The estimated highest block

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": {
    startingBlock: '0x384',
    currentBlock: '0x386',
    highestBlock: '0x454'
  }
}
// Or when not syncing
{
  "id":1,
  "jsonrpc": "2.0",
  "result": false
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}'

eth_uninstallFilter

Uninstalls a filter with given id. Should always be called when watch is no longer needed. Additionally Filters timeout when they aren't requested with eth_getFilterChanges for a period of time.

This method will use 10 Compute Units.

Reference: Here

Parameters

QUANTITY - The filter id.

params: [
  "0xb", // 11
]

Returns

Boolean - true if the filter was successfully uninstalled, otherwise false.

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": true
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_uninstallFilter","params":["0xb"],"id":73}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_uninstallFilter","params":["0xb"],"id":73}'

eth_unsubscribe

Cancels an existing subscription so that no further events are sent.

This method will use 10 Compute Units.

Parameters

subscription name - string, same as previously returned from an eth_subscribe call

params: [
  "0x5302037dae412a3454143512a3c7617b",
]

Returns

true if a subscription was successfully cancelled, or false if no subscription existed with the given ID.

// Result
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": true
}

wscat -c wss:///mainnet.conflux.validationcloud.io/v1/wss/<YOUR_API_KEY_HERE>
# wait for connection
{"jsonrpc":  "2.0",  "id":  1,  "method":"eth_subscribe","params":["newHeads"]}
# subscription ID returned
{"jsonrpc":"2.0","result":"0x5302037dae412a3454143512a3c7617b","id":1}

# Use subscription ID to cancel
{"id": 1, "jsonrpc":  "2.0", "method": "eth_unsubscribe", "params": ["0x5302037dae412a3454143512a3c7617b"]}
{"jsonrpc":"2.0","result":true,"id":1}

wscat -c wss:///testnet.conflux.validationcloud.io/v1/wss/<YOUR_API_KEY_HERE>
# wait for connection
{"jsonrpc":  "2.0",  "id":  1,  "method":"eth_subscribe","params":["newHeads"]}
# subscription ID returned
{"jsonrpc":"2.0","result":"0x5302037dae412a3454143512a3c7617b","id":1}

# Use subscription ID to cancel
{"id": 1, "jsonrpc":  "2.0", "method": "eth_unsubscribe", "params": ["0x5302037dae412a3454143512a3c7617b"]}
{"jsonrpc":"2.0","result":true,"id":1}

net_version

Returns the current network id.

This method will use 5 Compute Units.

Reference: Here

Parameters

None

Returns

String - The current network id.

The full list of current network IDs is available at chainlist.org. Some common ones are:

1: Ethereum Mainnet
1030: Conflux eSpace Mainnet
71: Conflux eSpace Testnet

// Result
{
  "id":67,
  "jsonrpc": "2.0",
  "result": "1030"
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}'

web3_clientVersion

Returns the current client version.

This method will use 20 Compute Units.

Reference: Here

Parameters

None

Returns

string - The current client version 20 Bytes - addresses owned by the client

// Result
{
	"jsonrpc": "2.0",
	"result": "conflux-rust/v2.4.0-205095d-20240628/x86_64-linux-gnu/rustc1.77.2",
	"id": 67
}

curl https://mainnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":67}'

curl https://testnet.conflux.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":67}'