graphql

package
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 Go to latest Published: May 6, 2019 License: GPL-3.0 Imports: 24 Imported by: 0

Documentation

Overview

Package graphql provides a GraphQL interface to Ethereum node data.

Index

Constants

This section is empty.

Variables

View Source 
var BlockInvariantError = errors.New("Block objects must be instantiated with at least one of num or hash.")
View Source 
var OnlyOnMainChainError = errors.New("This operation is only available for blocks on the canonical chain.")

Functions

func NewHandler 

func NewHandler(be *eth.EthAPIBackend) (http.Handler, error)

NewHandler returns a new `http.Handler` that will answer GraphQL queries. It additionally exports an interactive query browser on the / endpoint.

func RegisterGraphQLService 

func RegisterGraphQLService(stack *node.Node, endpoint string, cors, vhosts []string, timeouts rpc.HTTPTimeouts) error

RegisterGraphQLService is a utility function to construct a new service and register it against a node.

Types

type Account 

type Account struct {
	// contains filtered or unexported fields
}

Account represents an Ethereum account at a particular block.

func (*Account) Address 

func (a *Account) Address(ctx context.Context) (common.Address, error)

func (*Account) Balance 

func (a *Account) Balance(ctx context.Context) (hexutil.Big, error)

func (*Account) Code 

func (a *Account) Code(ctx context.Context) (hexutil.Bytes, error)

func (*Account) Storage 

func (a *Account) Storage(ctx context.Context, args struct{ Slot common.Hash }) (common.Hash, error)

func (*Account) TransactionCount 

func (a *Account) TransactionCount(ctx context.Context) (hexutil.Uint64, error)

type Block 

type Block struct {
	// contains filtered or unexported fields
}

Block represents an Ethereum block. backend, and either num or hash are mandatory. All other fields are lazily fetched when required.

func (*Block) Account 

func (b *Block) Account(ctx context.Context, args struct {
	Address common.Address
}) (*Account, error)

func (*Block) Call 

func (b *Block) Call(ctx context.Context, args struct {
	Data ethapi.CallArgs
}) (*CallResult, error)

func (*Block) Difficulty 

func (b *Block) Difficulty(ctx context.Context) (hexutil.Big, error)

func (*Block) EstimateGas 

func (b *Block) EstimateGas(ctx context.Context, args struct {
	Data ethapi.CallArgs
}) (hexutil.Uint64, error)

func (*Block) ExtraData 

func (b *Block) ExtraData(ctx context.Context) (hexutil.Bytes, error)

func (*Block) GasLimit 

func (b *Block) GasLimit(ctx context.Context) (hexutil.Uint64, error)

func (*Block) GasUsed 

func (b *Block) GasUsed(ctx context.Context) (hexutil.Uint64, error)

func (*Block) Hash 

func (b *Block) Hash(ctx context.Context) (common.Hash, error)

func (*Block) Logs 

func (b *Block) Logs(ctx context.Context, args struct{ Filter BlockFilterCriteria }) ([]*Log, error)

func (*Block) LogsBloom 

func (b *Block) LogsBloom(ctx context.Context) (hexutil.Bytes, error)

func (*Block) Miner 

func (b *Block) Miner(ctx context.Context, args BlockNumberArgs) (*Account, error)

func (*Block) MixHash 

func (b *Block) MixHash(ctx context.Context) (common.Hash, error)

func (*Block) Nonce 

func (b *Block) Nonce(ctx context.Context) (hexutil.Bytes, error)

func (*Block) Number 

func (b *Block) Number(ctx context.Context) (hexutil.Uint64, error)

func (*Block) OmmerAt 

func (b *Block) OmmerAt(ctx context.Context, args struct{ Index int32 }) (*Block, error)

func (*Block) OmmerCount 

func (b *Block) OmmerCount(ctx context.Context) (*int32, error)

func (*Block) OmmerHash 

func (b *Block) OmmerHash(ctx context.Context) (common.Hash, error)

func (*Block) Ommers 

func (b *Block) Ommers(ctx context.Context) (*[]*Block, error)

func (*Block) Parent 

func (b *Block) Parent(ctx context.Context) (*Block, error)

func (*Block) ReceiptsRoot 

func (b *Block) ReceiptsRoot(ctx context.Context) (common.Hash, error)

func (*Block) StateRoot 

func (b *Block) StateRoot(ctx context.Context) (common.Hash, error)

func (*Block) Timestamp 

func (b *Block) Timestamp(ctx context.Context) (hexutil.Uint64, error)

func (*Block) TotalDifficulty 

func (b *Block) TotalDifficulty(ctx context.Context) (hexutil.Big, error)

func (*Block) TransactionAt 

func (b *Block) TransactionAt(ctx context.Context, args struct{ Index int32 }) (*Transaction, error)

func (*Block) TransactionCount 

func (b *Block) TransactionCount(ctx context.Context) (*int32, error)

func (*Block) Transactions 

func (b *Block) Transactions(ctx context.Context) (*[]*Transaction, error)

func (*Block) TransactionsRoot 

func (b *Block) TransactionsRoot(ctx context.Context) (common.Hash, error)

type BlockFilterCriteria 

type BlockFilterCriteria struct {
	Addresses *[]common.Address // restricts matches to events created by specific contracts

	// The Topic list restricts matches to particular event topics. Each event has a list
	// of topics. Topics matches a prefix of that list. An empty element slice 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 *[][]common.Hash
}

BlockFilterCriteria encapsulates criteria passed to a `logs` accessor inside a block.

type BlockNumberArgs 

type BlockNumberArgs struct {
	Block *hexutil.Uint64
}

BlockNumberArgs encapsulates arguments to accessors that specify a block number.

func (BlockNumberArgs) Number 

func (a BlockNumberArgs) Number() rpc.BlockNumber

Number returns the provided block number, or rpc.LatestBlockNumber if none was provided.

type BlockType 

type BlockType int

type CallData 

type CallData struct {
	From     *common.Address // The Ethereum address the call is from.
	To       *common.Address // The Ethereum address the call is to.
	Gas      *hexutil.Uint64 // The amount of gas provided for the call.
	GasPrice *hexutil.Big    // The price of each unit of gas, in wei.
	Value    *hexutil.Big    // The value sent along with the call.
	Data     *hexutil.Bytes  // Any data sent with the call.
}

CallData encapsulates arguments to `call` or `estimateGas`. All arguments are optional.

type CallResult 

type CallResult struct {
	// contains filtered or unexported fields
}

CallResult encapsulates the result of an invocation of the `call` accessor.

func (*CallResult) Data 

func (c *CallResult) Data() hexutil.Bytes

func (*CallResult) GasUsed 

func (c *CallResult) GasUsed() hexutil.Uint64

func (*CallResult) Status 

func (c *CallResult) Status() hexutil.Uint64

type FilterCriteria 

type FilterCriteria struct {
	FromBlock *hexutil.Uint64   // beginning of the queried range, nil means genesis block
	ToBlock   *hexutil.Uint64   // end of the range, nil means latest block
	Addresses *[]common.Address // restricts matches to events created by specific contracts

	// The Topic list restricts matches to particular event topics. Each event has a list
	// of topics. Topics matches a prefix of that list. An empty element slice 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 *[][]common.Hash
}

FilterCriteria encapsulates the arguments to `logs` on the root resolver object.

type GraphiQL 

type GraphiQL struct{}

GraphiQL is an in-browser IDE for exploring GraphiQL APIs. This handler returns GraphiQL when requested.

For more information, see https://github.com/graphql/graphiql.

func (GraphiQL) ServeHTTP 

func (h GraphiQL) ServeHTTP(w http.ResponseWriter, r *http.Request)

type Log 

type Log struct {
	// contains filtered or unexported fields
}

Log represents an individual log message. All arguments are mandatory.

func (*Log) Account 

func (l *Log) Account(ctx context.Context, args BlockNumberArgs) *Account

func (*Log) Data 

func (l *Log) Data(ctx context.Context) hexutil.Bytes

func (*Log) Index 

func (l *Log) Index(ctx context.Context) int32

func (*Log) Topics 

func (l *Log) Topics(ctx context.Context) []common.Hash

func (*Log) Transaction 

func (l *Log) Transaction(ctx context.Context) *Transaction

type Pending 

type Pending struct {
	// contains filtered or unexported fields
}

func (*Pending) Account 

func (p *Pending) Account(ctx context.Context, args struct {
	Address common.Address
}) *Account

func (*Pending) Call 

func (p *Pending) Call(ctx context.Context, args struct {
	Data ethapi.CallArgs
}) (*CallResult, error)

func (*Pending) EstimateGas 

func (p *Pending) EstimateGas(ctx context.Context, args struct {
	Data ethapi.CallArgs
}) (hexutil.Uint64, error)

func (*Pending) TransactionCount 

func (p *Pending) TransactionCount(ctx context.Context) (int32, error)

func (*Pending) Transactions 

func (p *Pending) Transactions(ctx context.Context) (*[]*Transaction, error)

type Resolver 

type Resolver struct {
	// contains filtered or unexported fields
}

Resolver is the top-level object in the GraphQL hierarchy.

func (*Resolver) Block 

func (r *Resolver) Block(ctx context.Context, args struct {
	Number *hexutil.Uint64
	Hash   *common.Hash
}) (*Block, error)

func (*Resolver) Blocks 

func (r *Resolver) Blocks(ctx context.Context, args struct {
	From hexutil.Uint64
	To   *hexutil.Uint64
}) ([]*Block, error)

func (*Resolver) GasPrice 

func (r *Resolver) GasPrice(ctx context.Context) (hexutil.Big, error)

func (*Resolver) Logs 

func (r *Resolver) Logs(ctx context.Context, args struct{ Filter FilterCriteria }) ([]*Log, error)

func (*Resolver) Pending 

func (r *Resolver) Pending(ctx context.Context) *Pending

func (*Resolver) ProtocolVersion 

func (r *Resolver) ProtocolVersion(ctx context.Context) (int32, error)

func (*Resolver) SendRawTransaction 

func (r *Resolver) SendRawTransaction(ctx context.Context, args struct{ Data hexutil.Bytes }) (common.Hash, error)

func (*Resolver) Syncing 

func (r *Resolver) Syncing() (*SyncState, error)

Syncing returns false in case the node is currently not syncing with the network. It can be up to date or has not yet received the latest block headers from its pears. In case it is synchronizing: - startingBlock: block number this node started to synchronise from - currentBlock: block number this node is currently importing - highestBlock: block number of the highest block header this node has received from peers - pulledStates: number of state entries processed until now - knownStates: number of known state entries that still need to be pulled

func (*Resolver) Transaction 

func (r *Resolver) Transaction(ctx context.Context, args struct{ Hash common.Hash }) (*Transaction, error)

type Service 

type Service struct {
	// contains filtered or unexported fields
}

Service encapsulates a GraphQL service.

func NewService 

func NewService(backend *eth.EthAPIBackend, endpoint string, cors, vhosts []string, timeouts rpc.HTTPTimeouts) (*Service, error)

NewService constructs a new service instance.

func (*Service) APIs 

func (s *Service) APIs() []rpc.API

APIs returns the list of APIs exported by this service.

func (*Service) Protocols 

func (s *Service) Protocols() []p2p.Protocol

Protocols returns the list of protocols exported by this service.

func (*Service) Start 

func (s *Service) Start(server *p2p.Server) error

Start is called after all services have been constructed and the networking layer was also initialized to spawn any goroutines required by the service.

func (*Service) Stop 

func (s *Service) Stop() error

Stop terminates all goroutines belonging to the service, blocking until they are all terminated.

type SyncState 

type SyncState struct {
	// contains filtered or unexported fields
}

SyncState represents the synchronisation status returned from the `syncing` accessor.

func (*SyncState) CurrentBlock 

func (s *SyncState) CurrentBlock() hexutil.Uint64

func (*SyncState) HighestBlock 

func (s *SyncState) HighestBlock() hexutil.Uint64

func (*SyncState) KnownStates 

func (s *SyncState) KnownStates() *hexutil.Uint64

func (*SyncState) PulledStates 

func (s *SyncState) PulledStates() *hexutil.Uint64

func (*SyncState) StartingBlock 

func (s *SyncState) StartingBlock() hexutil.Uint64

type Transaction 

type Transaction struct {
	// contains filtered or unexported fields
}

Transaction represents an Ethereum transaction. backend and hash are mandatory; all others will be fetched when required.

func (*Transaction) Block 

func (t *Transaction) Block(ctx context.Context) (*Block, error)

func (*Transaction) CreatedContract 

func (t *Transaction) CreatedContract(ctx context.Context, args BlockNumberArgs) (*Account, error)

func (*Transaction) CumulativeGasUsed 

func (t *Transaction) CumulativeGasUsed(ctx context.Context) (*hexutil.Uint64, error)

func (*Transaction) From 

func (t *Transaction) From(ctx context.Context, args BlockNumberArgs) (*Account, error)

func (*Transaction) Gas 

func (t *Transaction) Gas(ctx context.Context) (hexutil.Uint64, error)

func (*Transaction) GasPrice 

func (t *Transaction) GasPrice(ctx context.Context) (hexutil.Big, error)

func (*Transaction) GasUsed 

func (t *Transaction) GasUsed(ctx context.Context) (*hexutil.Uint64, error)

func (*Transaction) Hash 

func (tx *Transaction) Hash(ctx context.Context) common.Hash

func (*Transaction) Index 

func (t *Transaction) Index(ctx context.Context) (*int32, error)

func (*Transaction) InputData 

func (t *Transaction) InputData(ctx context.Context) (hexutil.Bytes, error)

func (*Transaction) Logs 

func (t *Transaction) Logs(ctx context.Context) (*[]*Log, error)

func (*Transaction) Nonce 

func (t *Transaction) Nonce(ctx context.Context) (hexutil.Uint64, error)

func (*Transaction) Status 

func (t *Transaction) Status(ctx context.Context) (*hexutil.Uint64, error)

func (*Transaction) To 

func (t *Transaction) To(ctx context.Context, args BlockNumberArgs) (*Account, error)

func (*Transaction) Value 

func (t *Transaction) Value(ctx context.Context) (hexutil.Big, error)

Source Files

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