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+# 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 {
+  # 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!
+}