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API Objects
The following objects are parameters for or returned by Enter API methods.

Block object

Key
Type
Value
number
Quantity, Integer
Block number. null when block is pending.
hash
Data, 32 bytes
Hash of the block. null when block is pending.
parentHash
Data, 32 bytes
Hash of the parent block.
nonce
Data, 8 bytes
Hash of the generated proof of work. null when block is pending.
sha3Uncles
Data, 32 bytes
SHA3 of the uncle’s data in the block.
logsBloom
Data, 256 bytes
Bloom filter for the block logs. null when block is pending.
transactionsRoot
Data, 32 bytes
Root of the transaction trie for the block.
stateRoot
Data, 32 bytes
Root of the final state trie for the block.
receiptsRoot
Data, 32 bytes
Root of the receipts trie for the block.
miner
Data, 20 bytes
Address to pay mining rewards to.
difficulty
Quantity, Integer
Difficulty for this block.
totalDifficulty
Quantity, Integer
Total difficulty of the chain until this block.
extraData
Data
Extra data field for this block. The first 32 bytes is vanity data you can set using the --miner-extra-data command line option. Stores extra data when used with Clique and IBFT.
size
Quantity, Integer
Size of block in bytes.
gasLimit
Quantity
Maximum gas allowed in this block.
gasUsed
Quantity
Total gas used by all transactions in this block.
timestamp
Quantity
Unix timestamp for block assembly.
transactions
Array
Array of transaction objects, or 32 byte transaction hashes depending on the specified boolean parameter.
uncles
Array
Array of uncle hashes.
baseFeePerGas
Quantity
The block’s base fee per gas. This field is empty for blocks created before EIP-1559.

Fee history results object

Returned by eth_feeHistory for the requested block range. If blocks in the specified block range are not available, then only the fee history for available blocks is returned.
Key
Type
Value
oldestBlock
Quantity, Integer
Lowest number block of the returned range.
baseFeePerGas
Array
Array of block base fees per gas, including an extra block value. The extra value is the next block after the newest block in the returned range. Returns zeroes for blocks created before EIP-1559.
gasUsedRatio
Array
Array of block gas used ratios. These are calculated as the ratio of gasUsed and gasLimit.

Filter options object

Parameter for eth_newFilter, eth_getLogs, and priv_getLogs. Used to filter logs.
Key
Type
Required/Optional
Value
fromBlock
Quantity | Tag
Optional
Integer block number or latest, pending, earliest. See Block Parameter. Default is latest.
toBlock
Quantity | Tag
Optional
Integer block number or latest, pending, earliest. See Block Parameter. Default is latest.
address
Data | Array
Optional
Contract address or array of addresses from which logs originate.
topics
Array of Data, 32 bytes each
Optional
Array of topics by which to filter logs.
eth_getLogs and priv_getLogs have an extra key.
Key
Type
Required/Optional
Value
blockHash
Data, 32 bytes
Optional.
Hash of block for which to return logs. If you specify blockHash, you cannot specify fromBlock and toBlock.

Log object

Returned by eth_getFilterChanges and priv_getLogs. Transaction receipt objects can contain an array of log objects.
Key
Type
Value
removed
Tag
true if log removed because of a chain reorganization. false if a valid log.
logIndex
Quantity, Integer
Log index position in the block. null when log is pending.
transactionIndex
Quantity, Integer
Index position of the starting transaction for the log. null when log is pending.
transactionHash
Data, 32 bytes
Hash of the starting transaction for the log. null when log is pending.
blockHash
Data, 32 bytes
Hash of the block that includes the log. null when log is pending.
blockNumber
Quantity
Number of block that includes the log. null when log is pending.
address
Data, 20 bytes
Address the log originated from.
data
Data
Non-indexed arguments of the log.
topics
Array of Data, 32 bytes each

Miner data object

Key
Type
Value
netBlockReward
Quantity, Integer
The net block reward, in Wei, is staticBlockReward + transactionFee + uncleInclusionReward.
staticBlockReward
Quantity, Integer
The static block reward, in Wei, is preset on a hard fork.
transactionFee
Quantity, Integer
The transaction fee, in Wei, is sum of upfront cost - refund amount for all transactions.
uncleInclusionReward
Quantity, Integer
The uncle inclusion reward, in Wei, is static block reward * number of ommers/32.
uncleRewards
Map
Map of uncle block hashes and uncle miner coinbase addresses.
coinbase
Data, 20 bytes
Coinbase address.
extraData
Data
Extra data field for this block. The first 32 bytes is vanity data you can set using the --miner-extra-data command line option.
difficulty
Quantity, Integer
Difficulty of this block.
totalDifficulty
Quantity, Integer
Total difficulty of the chain until this block.

Pending transaction object

Key
Type
Value
accessList
Array
(Optional) List of addresses and storage keys the transaction plans to access. Used in ACCESS_LIST transactions and may be used in EIP1559 transactions.
from
Data, 20 bytes
Address of the sender.
gas
Quantity
Gas provided by the sender.
gasPrice
Quantity
(Optional) Gas price, in Wei, provided by the sender. Not used only in EIP1559 transactions.
maxPriorityFeePerGas
Quantity, Integer
(Optional) Maximum fee, in Wei, the sender is willing to pay per gas above the base fee. Used only in EIP1559 transactions.
maxFeePerGas
Quantity, Integer
(Optional) Maximum total fee (base fee + priority fee), in Wei, the sender is willing to pay per gas. Used only in EIP1559 transactions.
hash
Data, 32 bytes
Hash of the transaction.
input
Data
Data sent with the transaction to create or invoke a contract.
nonce
Quantity
Number of transactions made by the sender before this one.
to
Data, 20 bytes
Address of the receiver. null if a contract creation transaction.
transactionType
String
value
Quantity
Value transferred, in Wei.
v
Quantity
ECDSA Recovery ID.
r
Data, 32 bytes
ECDSA signature r.
s
Data, 32 bytes
ECDSA signature s.

Private transaction object

Key
Type
Value
from
Data, 20 bytes
Address of the sender.
gas
Quantity
Gas provided by the sender.
gasPrice
Quantity
Gas price, in Wei, provided by the sender.
hash
Data, 32 bytes
Hash of the transaction.
input
Data
The data to create or invoke a contract.
nonce
Quantity
Number of transactions made by the sender to the privacy group before this one.
to
Data, 20 bytes
null if a contract creation transaction, otherwise, the contract address.
value
Quantity
null because private transactions cannot transfer Ether.
v
Quantity
ECDSA Recovery ID.
r
Data, 32 bytes
ECDSA signature r.
s
Data, 32 bytes
ECDSA signature s.
privateFrom
Data, 32 bytes
Tessera public key of the sender.
privateFor
Array of Data, 32 bytes each
Tessera public keys of recipients. Not returned if using privacyGroupId to send the transaction.
privacyGroupId
Data, 32 bytes
Tessera privacy group ID of recipients. Not returned if using privateFor to send the transaction.
restriction
String
Must be restricted.

Range object

Key
Type
Value
storage
Object
Key hash and value. Pre-image key is null if it falls outside the cache.
nextKey
Hash
Hash of next key if further storage in range. Otherwise, not included.

Structured log object

Log information returned as part of the Trace object.
Key
Type
Value
pc
Integer
Current program counter.
op
String
Current OpCode.
gas
Integer
Gas remaining.
gasCost
Integer
Cost in wei of each gas unit.
depth
Integer
Execution depth.
exceptionalHaltReasons
Array
One or more strings representing an error condition causing the EVM execution to terminate. These strings suggest that EVM execution terminated for reasons such as running out of gas or attempting to execute an unknown instruction. Generally a single exceptional halt reason returns but it’s possible for more than one to occur at once.
stack
Array of 32 byte arrays
EVM execution stack before executing current operation.
memory
Array of 32 byte arrays
Memory space of the contract before executing current operation.
storage
Object
Storage entries changed by the current transaction.

Trace object

Key
Type
Value
gas
Integer
Gas used by the transaction.
failed
Boolean
True if transaction failed, otherwise, false.
returnValue
String
Bytes returned from transaction execution (without a 0x prefix).
structLogs
Array
Array of structured log objects.

Transaction object

Key
Type
Value
accessList
Array
(Optional) List of addresses and storage keys the transaction plans to access. Used in ACCESS_LIST transactions and may be used in EIP1559 transactions.
blockHash
Data, 32 bytes
Hash of the block containing this transaction. null when transaction is pending.
blockNumber
Quantity
Block number of the block containing this transaction. null when transaction is pending.
chainId
Quantity
from
Data, 20 bytes
Address of the sender.
gas
Quantity
Gas provided by the sender.
gasPrice
Quantity
(Optional) Gas price, in Wei, provided by the sender. Not used only in EIP1559 transactions.
maxPriorityFeePerGas
Quantity, Integer
(Optional) Maximum fee, in Wei, the sender is willing to pay per gas above the base fee. Used only in EIP1559 transactions.
maxFeePerGas
Quantity, Integer
(Optional) Maximum total fee (base fee + priority fee), in Wei, the sender is willing to pay per gas. Used only in EIP1559 transactions.
hash
Data, 32 bytes
Hash of the transaction.
input
Data
Data sent with the transaction to create or invoke a contract. For private transactions, it’s a pointer to the transaction location in Tessera.
nonce
Quantity
Number of transactions made by the sender before this one.
publicKey
Data, 64 bytes
Public key of the sender.
raw
Data
This signed transaction in Recursive Length Prefix (RLP) encoded form.
to
Data, 20 bytes
Address of the receiver. null if a contract creation transaction.
transactionIndex
Quantity, Integer
Index position of the transaction in the block. null when transaction is pending.
transactionType
String
value
Quantity
Value transferred, in Wei.
v
Quantity
ECDSA Recovery ID.
r
Data, 32 bytes
ECDSA signature r.

Transaction call object

Parameter for eth_call and eth_estimateGas.
Note
All transaction call object parameters are optional for eth_estimateGas. Only the to parameter is required for eth_call.
Key
Type
Value
from
Data, 20 bytes
Address of the sender.
to
Data, 20 bytes
Address of the action receiver.
gas
Quantity, Integer
Gas provided by the sender. eth_call consumes zero gas, but other executions might need this parameter. eth_estimateGas ignores this value.
gasPrice
Quantity, Integer
Gas price, in Wei, provided by the sender. The default is 0. Can’t be used only in EIP1559 transactions.
maxPriorityFeePerGas
Quantity, Integer
Maximum fee, in Wei, the sender is willing to pay per gas above the base fee. Can be used only in EIP1559 transactions. If used, must specify maxFeePerGas.
maxFeePerGas
Quantity, Integer
Maximum total fee (base fee + priority fee), in Wei, the sender is willing to pay per gas. Can be used only in EIP1559 transactions. If used, must specify maxPriorityFeePerGas.
value
Quantity, Integer
Value transferred, in Wei.
data
Data
Hash of the method signature and encoded parameters. For details, see Ethereum Contract ABI.
strict
Tag
If true, checks that the from account’s ether balance is sufficient to cover the transaction and gas fee. If false, this balance is not checked. The default is false.

Transaction receipt object

Key
Type
Value
blockHash
Data, 32 bytes
Hash of block containing this transaction.
blockNumber
Quantity
Block number of block containing this transaction.
contractAddress
Data, 20 bytes
Contract address created, if contract creation transaction, otherwise, null.
cumulativeGasUsed
Quantity
Total amount of gas used by previous transactions in the block and this transaction.
effectiveGasPrice
Quantity
The actual value per gas deducted from the sender’s account.
from
Data, 20 bytes
Address of the sender.
gasUsed
Quantity
Amount of gas used by this specific transaction.
logs
Array
Array of log objects generated by this transaction.
logsBloom
Data, 256 bytes
Bloom filter for light clients to quickly retrieve related logs.
status
Quantity
Either 0x0 (failure), 0x1 (success), or 0x2 (invalid).
to
Data, 20 bytes
Address of the receiver, if sending ether, otherwise, null.
transactionHash
Data, 32 bytes
Hash of the transaction.
transactionIndex
Quantity, Integer
Index position of transaction in the block.
transactionType
String
revertReason
String
ABI-encoded string that displays the reason for reverting the transaction. Only available if revert reason is enabled.
Note
For pre-Byzantium transactions, the transaction receipt object includes the following instead of status:
Key
Type
Value
root
Data, 32 bytes
Post-transaction state root

Transaction trace object

Key
Type
Value
output
Boolean
Transaction result. 1 for success and 0 for failure.
transactionHash
Data, 32 bytes
Hash of the replayed transaction.

Private transaction receipt object

Key
Type
Value
blockHash
Data, 32 bytes
Hash of block containing this transaction.
blockNumber
Quantity
Block number of block containing this transaction.
contractAddress
Data, 20 bytes
Contract address created if a contract creation transaction, otherwise, null.
from
Data, 20 bytes
Address of the sender.
logs
Array
Array of log objects generated by this private transaction.
to
Data, 20 bytes
Address of the receiver, if sending ether, otherwise, null.
transactionHash
Data, 32 bytes
Hash of the private transaction.
transactionIndex
Quantity, Integer
Index position of transaction in the block.
revertReason
String
ABI-encoded string that displays the reason for reverting the transaction. Only available if revert reason is enabled.
output
Data
RLP-encoded return value of a contract call if a value returns, otherwise, null.
commitmentHash
Data, 32 bytes
Hash of the privacy marker transaction.
status
Quantity
Either 0x1 (success) or 0x0 (failure).
privateFrom
Data, 32 bytes
Tessera public key of the sender.
privateFor or privacyGroupId
Array or Data, 32 bytes
Tessera public keys or privacy group ID of the recipients.
logsBloom
Data, 256 bytes
Bloom filter for light clients to quickly retrieve related logs.