# Bytes32 is a 32 byte binary string, represented as 0x-prefixed hexadecimal.
scalar Bytes32

# Address is a 20 byte Ethereum address, represented as 0x-prefixed hexadecimal.
scalar Address

# Bytes is an arbitrary length binary string, represented as 0x-prefixed hexadecimal.
# An empty byte string is represented as '0x'. Byte strings must have an even number of hexadecimal nybbles.
scalar Bytes

# BigInt is a large integer. Input is accepted as either a JSON number or as a string.
# Strings may be either decimal or 0x-prefixed hexadecimal. Output values are all
# 0x-prefixed hexadecimal.
scalar BigInt

# Long is a 64 bit unsigned integer.
scalar Long

schema {
  query: Query
  mutation: Mutation
}

# Account is an Ethereum account at a particular block.
type Account {
  # Address is the address owning the account.
  address: Address!

  # Balance is the balance of the account, in wei.
  balance: BigInt!

  # TransactionCount is the number of transactions sent from this account,
  # or in the case of a contract, the number of contracts created. Otherwise
  # known as the nonce.
  transactionCount: Long!

  # Code contains the smart contract code for this account, if the account
  # is a (non-self-destructed) contract.
  code: Bytes!

  # Storage provides access to the storage of a contract account, indexed
  # by its 32 byte slot identifier.
  storage(slot: Bytes32!): Bytes32!
}

# Log is an Ethereum event log.
type Log {
  # Index is the index of this log in the block.
  index: Int!

  # Account is the account which generated this log - this will always
  # be a contract account.
  account(block: Long): Account!

  # Topics is a list of 0-4 indexed topics for the log.
  topics: [Bytes32!]!

  # Data is unindexed data for this log.
  data: Bytes!

  # Transaction is the transaction that generated this log entry.
  transaction: Transaction!
}

# Transaction is an Ethereum transaction.
type Transaction {
  # Hash is the hash of this transaction.
  hash: Bytes32!

  # Nonce is the nonce of the account this transaction was generated with.
  nonce: Long!

  # Index is the index of this transaction in the parent block. This will
  # be null if the transaction has not yet been mined.
  index: Int

  # From is the account that sent this transaction - this will always be
  # an externally owned account.
  from(block: Long): Account!

  # To is the account the transaction was sent to. This is null for
  # contract-creating transactions.
  to(block: Long): Account

  # Value is the value, in wei, sent along with this transaction.
  value: BigInt!

  # GasPrice is the price offered to miners for gas, in wei per unit.
  gasPrice: BigInt!

  # Gas is the maximum amount of gas this transaction can consume.
  gas: Long!

  # InputData is the data supplied to the target of the transaction.
  inputData: Bytes!

  # Block is the block this transaction was mined in. This will be null if
  # the transaction has not yet been mined.
  block: Block

  #----------------------- Receipt fields ---------------------------------

  # Status is the return status of the transaction. This will be 1 if the
  # transaction succeeded, or 0 if it failed (due to a revert, or due to
  # running out of gas). If the transaction has not yet been mined, this
  # field will be null.
  status: Long

  # GasUsed is the amount of gas that was used processing this transaction.
  # If the transaction has not yet been mined, this field will be null.
  gasUsed: Long

  # CumulativeGasUsed is the total gas used in the block up to and including
  # this transaction. If the transaction has not yet been mined, this field
  # will be null.
  cumulativeGasUsed: Long

  # CreatedContract is the account that was created by a contract creation
  # transaction. If the transaction was not a contract creation transaction,
  # or it has not yet been mined, this field will be null.
  createdContract(block: Long): Account

  # Logs is a list of log entries emitted by this transaction. If the
  # transaction has not yet been mined, this field will be null.
  logs: [Log!]
}

# BlockFilterCriteria encapsulates log filter criteria for a filter applied
# to a single block.
input BlockFilterCriteria {
  # Addresses is list of addresses that are of interest. If this list is
  # empty, results will not be filtered by address.
  addresses: [Address!]

  # Topics list restricts matches to particular event topics. Each event has a list
  # of topics. Topics matches a prefix of that list. An empty element array matches any
  # topic. Non-empty elements represent an alternative that matches any of the
  # contained topics.
  #
  # Examples:
  #  - [] or nil      matches any topic list
  #  - [[A]]        matches topic A in first position
  #  - [[], [B]]      matches any topic in first position, B in second position
  #  - [[A], [B]]     matches topic A in first position, B in second position
  #  - [[A, B]], [C, D]]  matches topic (A OR B) in first position, (C OR D) in second position
  topics: [[Bytes32!]!]
}

# Block is an Ethereum block.
type Block {
  # Number is the number of this block, starting at 0 for the genesis block.
  number: Long!

  # Hash is the block hash of this block.
  hash: Bytes32!

  # Parent is the parent block of this block.
  parent: Block

  # Nonce is the block nonce, an 8 byte sequence determined by the miner.
  nonce: Bytes!

  # TransactionsRoot is the keccak256 hash of the root of the trie of transactions in this block.
  transactionsRoot: Bytes32!

  # TransactionCount is the number of transactions in this block. if
  # transactions are not available for this block, this field will be null.
  transactionCount: Int

  # StateRoot is the keccak256 hash of the state trie after this block was processed.
  stateRoot: Bytes32!

  # ReceiptsRoot is the keccak256 hash of the trie of transaction receipts in this block.
  receiptsRoot: Bytes32!

  # Miner is the account that mined this block.
  miner(block: Long): Account!

  # ExtraData is an arbitrary data field supplied by the miner.
  extraData: Bytes!

  # GasLimit is the maximum amount of gas that was available to transactions in this block.
  gasLimit: Long!

  # GasUsed is the amount of gas that was used executing transactions in this block.
  gasUsed: Long!

  # Timestamp is the unix timestamp at which this block was mined.
  timestamp: BigInt!

  # LogsBloom is a bloom filter that can be used to check if a block may
  # contain log entries matching a filter.
  logsBloom: Bytes!

  # MixHash is the hash that was used as an input to the PoW process.
  mixHash: Bytes32!

  # Difficulty is a measure of the difficulty of mining this block.
  difficulty: BigInt!

  # TotalDifficulty is the sum of all difficulty values up to and including
  # this block.
  totalDifficulty: BigInt!

  # OmmerCount is the number of ommers (AKA uncles) associated with this
  # block. If ommers are unavailable, this field will be null.
  ommerCount: Int

  # Ommers is a list of ommer (AKA uncle) blocks associated with this block.
  # If ommers are unavailable, this field will be null. Depending on your
  # node, the transactions, transactionAt, transactionCount, ommers,
  # ommerCount and ommerAt fields may not be available on any ommer blocks.
  ommers: [Block]

  # OmmerAt returns the ommer (AKA uncle) at the specified index. If ommers
  # are unavailable, or the index is out of bounds, this field will be null.
  ommerAt(index: Int!): Block

  # OmmerHash is the keccak256 hash of all the ommers (AKA uncles)
  # associated with this block.
  ommerHash: Bytes32!

  # Transactions is a list of transactions associated with this block. If
  # transactions are unavailable for this block, this field will be null.
  transactions: [Transaction!]

  # TransactionAt returns the transaction at the specified index. If
  # transactions are unavailable for this block, or if the index is out of
  # bounds, this field will be null.
  transactionAt(index: Int!): Transaction

  # Logs returns a filtered set of logs from this block.
  logs(filter: BlockFilterCriteria!): [Log!]!

  # Account fetches an Ethereum account at the current block's state.
  account(address: Address!): Account

  # Call executes a local call operation at the current block's state.
  call(data: CallData!): CallResult

  # EstimateGas estimates the amount of gas that will be required for
  # successful execution of a transaction at the current block's state.
  estimateGas(data: CallData!): Long!
}

# CallData represents the data associated with a local contract call.
# All fields are optional.
input CallData {
  # From is the address making the call.
  from: Address

  # To is the address the call is sent to.
  to: Address

  # Gas is the amount of gas sent with the call.
  gas: Long

  # GasPrice is the price, in wei, offered for each unit of gas.
  gasPrice: BigInt

  # Value is the value, in wei, sent along with the call.
  value: BigInt

  # Data is the data sent to the callee.
  data: Bytes
}

# CallResult is the result of a local call operation.
type CallResult {
  # Data is the return data of the called contract.
  data: Bytes!

  # GasUsed is the amount of gas used by the call, after any refunds.
  gasUsed: Long!

  # Status is the result of the call - 1 for success or 0 for failure.
  status: Long!
}

# FilterCriteria encapsulates log filter criteria for searching log entries.
input FilterCriteria {
  # FromBlock is the block at which to start searching, inclusive. Defaults
  # to the latest block if not supplied.
  fromBlock: Long

  # ToBlock is the block at which to stop searching, inclusive. Defaults
  # to the latest block if not supplied.
  toBlock: Long

  # Addresses is a list of addresses that are of interest. If this list is
  # empty, results will not be filtered by address.
  addresses: [Address!]

  # Topics list restricts matches to particular event topics. Each event has a list
  # of topics. Topics matches a prefix of that list. An empty element array matches any
  # topic. Non-empty elements represent an alternative that matches any of the
  # contained topics.
  #
  # Examples:
  #  - [] or nil          matches any topic list
  #  - [[A]]              matches topic A in first position
  #  - [[], [B]]          matches any topic in first position, B in second position
  #  - [[A], [B]]         matches topic A in first position, B in second position
  #  - [[A, B]], [C, D]]  matches topic (A OR B) in first position, (C OR D) in second position
  topics: [[Bytes32!]!]
}

# SyncState contains the current synchronisation state of the client.
type SyncState{
  # StartingBlock is the block number at which synchronisation started.
  startingBlock: Long!

  # CurrentBlock is the point at which synchronisation has presently reached.
  currentBlock: Long!

  # HighestBlock is the latest known block number.
  highestBlock: Long!

  # PulledStates is the number of state entries fetched so far, or null
  # if this is not known or not relevant.
  pulledStates: Long

  # KnownStates is the number of states the node knows of so far, or null
  # if this is not known or not relevant.
  knownStates: Long
}

# Pending represents the current pending state.
type Pending {
  # TransactionCount is the number of transactions in the pending state.
  transactionCount: Int!

  # Transactions is a list of transactions in the current pending state.
  transactions: [Transaction!]

  # Account fetches an Ethereum account for the pending state.
  account(address: Address!): Account

  # Call executes a local call operation for the pending state.
  call(data: CallData!): CallResult

  # EstimateGas estimates the amount of gas that will be required for
  # successful execution of a transaction for the pending state.
  estimateGas(data: CallData!): Long!
}

type Query {
  # Account fetches an Ethereum account at the specified block number.
  # If blockNumber is not provided, it defaults to the most recent block.
  account(address: Address!, blockNumber: Long): Account!

  # Block fetches an Ethereum block by number or by hash. If neither is
  # supplied, the most recent known block is returned.
  block(number: Long, hash: Bytes32): Block

  # Blocks returns all the blocks between two numbers, inclusive. If
  # to is not supplied, it defaults to the most recent known block.
  blocks(from: Long!, to: Long): [Block!]!

  # Pending returns the current pending state.
  pending: Pending!

  # Transaction returns a transaction specified by its hash.
  transaction(hash: Bytes32!): Transaction

  # Logs returns log entries matching the provided filter.
  logs(filter: FilterCriteria!): [Log!]!

  # GasPrice returns the node's estimate of a gas price sufficient to
  # ensure a transaction is mined in a timely fashion.
  gasPrice: BigInt!

  # ProtocolVersion returns the current wire protocol version number.
  protocolVersion: Int!

  # Syncing returns information on the current synchronisation state.
  syncing: SyncState
}

type Mutation {
  # SendRawTransaction sends an RLP-encoded transaction to the network.
  sendRawTransaction(data: Bytes!): Bytes32!
}