types

package
v0.29.4 Latest Latest
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 Go to latest Published: Nov 22, 2019 License: Apache-2.0 Imports: 5 Imported by: 7

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Index

Constants

View Source 
const (
	EventFieldTypeInt     = "int"
	EventFieldTypeUInt    = "uint"
	EventFieldTypeAddress = "address"
	EventFieldTypeBytes   = "bytes"
	EventFieldTypeBool    = "bool"
	EventFieldTypeString  = "string"
)

Defined event input types - these are currently align with EVM types but they technically define a pair/mapping of EVM type -> SQL type

View Source 
const (
	PostgresDB = "postgres"
	SQLiteDB   = "sqlite"
)

supported databases

View Source 
const (
	// event related
	EventNameLabel  = "eventName"
	EventTypeLabel  = "eventType"
	EventIndexLabel = "eventIndex"

	// block related
	ChainIDLabel     = "chainID"
	BlockHeightLabel = "height"
	TxIndexLabel     = "txIndex"

	// transaction related
	TxTxHashLabel = "txHash"
)

labels for column mapping

Variables

View Source 
var DefaultSQLColumnNames = SQLColumnNames{

	Id:          "_id",
	TimeStamp:   "_timestamp",
	TableName:   "_tablename",
	EventName:   "_eventname",
	EventFilter: "_eventfilter",
	Height:      "_height",
	TxHash:      "_txhash",
	Action:      "_action",
	DataRow:     "_datarow",
	SqlStmt:     "_sqlstmt",
	SqlValues:   "_sqlvalues",

	ColumnName:   "_columnname",
	ColumnType:   "_columntype",
	ColumnLength: "_columnlength",
	PrimaryKey:   "_primarykey",
	ColumnOrder:  "_columnorder",

	BurrowVersion: "_burrowversion",
	ChainID:       "_chainid",

	TxIndex:     "_txindex",
	EventIndex:  "_eventindex",
	EventType:   "_eventtype",
	BlockHeader: "_blockheader",
	TxType:      "_txtype",
	Envelope:    "_envelope",
	Events:      "_events",
	Result:      "_result",
	Receipt:     "_receipt",
	Origin:      "_origin",
	Exception:   "_exception",
}
View Source 
var DefaultSQLNames = SQLNames{
	Tables:  DefaultSQLTableNames,
	Columns: DefaultSQLColumnNames,
}
View Source 
var DefaultSQLTableNames = SQLTableNames{
	Log:        "_vent_log",
	Dictionary: "_vent_dictionary",
	Block:      "_vent_block",
	Tx:         "_vent_tx",
	ChainInfo:  "_vent_chain",
}

Functions

func ProjectionSpecSchema added in v0.28.0 

func ProjectionSpecSchema() *jsonschema.Schema

Types

type DBAction 

type DBAction string

DBAction generic type 

const (
	ActionDelete      DBAction = "DELETE"
	ActionUpsert      DBAction = "UPSERT"
	ActionRead        DBAction = "READ"
	ActionCreateTable DBAction = "CREATE"
	ActionAlterTable  DBAction = "ALTER"
)

type EventClass 

type EventClass struct {
	// Destination table in DB
	TableName string
	// Burrow event filter query in query peg grammar
	Filter string
	// The name of a solidity event field that when present indicates that the rest of the event should be interpreted
	// as requesting a row deletion (rather than upsert) in the projection table.
	DeleteMarkerField string `json:",omitempty"`
	// EventFieldMapping from solidity event field name to EventFieldMapping descriptor
	FieldMappings []*EventFieldMapping
	// contains filtered or unexported fields
}

EventClass struct (table name where to persist filtered events and it structure)

func (*EventClass) GetFieldMapping 

func (ec *EventClass) GetFieldMapping(fieldName string) *EventFieldMapping

func (*EventClass) GetFilter 

func (ec *EventClass) GetFilter() string

func (*EventClass) Query 

func (ec *EventClass) Query() (query.Query, error)

Get a (memoised) Query from the EventClass Filter string

func (*EventClass) Validate 

func (ec *EventClass) Validate() error

Validate checks the structure of an EventClass

type EventData 

type EventData struct {
	BlockHeight uint64
	Tables      map[string]EventDataTable
}

EventData contains data for each block of events already mapped to SQL columns & tables Tables map key is the table name

type EventDataRow 

type EventDataRow struct {
	Action  DBAction
	RowData map[string]interface{}
	// The EventClass that caused this row to be emitted (if it was caused by an specific event)
	EventClass *EventClass `json:"-"`
}

EventDataRow contains each SQL column name and a corresponding value to upsert map key is the column name and map value is the given column value if Action == 'delete' then the row has to be deleted

type EventDataTable 

type EventDataTable []EventDataRow

EventDataTable is an array of rows

type EventFieldMapping 

type EventFieldMapping struct {
	// EVM event field name to process
	Field string
	// EVM type of this field - used to derive SQL type
	Type string
	// Destination SQL column name to which to map this event field
	ColumnName string
	// Whether this event field should map to a primary key
	Primary bool `json:",omitempty"`
	// Whether to convert this event field from bytes32 to string
	BytesToString bool `json:",omitempty"`
	// Notification channels on which submit (via a trigger) a payload that contains this column's new value (upsert) or
	// old value (delete). The payload will contain all other values with the same channel set as a JSON object.
	Notify []string `json:",omitempty"`
}

EventFieldMapping struct (table column definition)

func (EventFieldMapping) Validate 

func (evColumn EventFieldMapping) Validate() error

Validate checks the structure of an EventFieldMapping

type EventTables 

type EventTables map[string]*SQLTable

EventTables contains SQL tables definition Map from TableName to SQLTable

type ProjectionSpec added in v0.28.0 

type ProjectionSpec []*EventClass

ProjectionSpec contains all event class specifications

type SQLCleanDBQuery 

type SQLCleanDBQuery struct {
	SelectChainIDQry    string
	DeleteChainIDQry    string
	InsertChainIDQry    string
	SelectDictionaryQry string
	DeleteDictionaryQry string
	DeleteLogQry        string
}

SQLCleanDBQuery stores queries needed to clean the database

type SQLColumnNames added in v0.26.0 

type SQLColumnNames struct {
	// log
	Id          string
	TimeStamp   string
	TableName   string
	EventName   string
	EventFilter string
	Height      string
	TxHash      string
	Action      string
	DataRow     string
	SqlStmt     string
	SqlValues   string
	// dictionary
	ColumnName   string
	ColumnType   string
	ColumnLength string
	PrimaryKey   string
	ColumnOrder  string
	// chain info
	BurrowVersion string
	ChainID       string
	// context
	TxIndex     string
	EventIndex  string
	EventType   string
	BlockHeader string
	TxType      string
	Envelope    string
	Events      string
	Result      string
	Receipt     string
	Origin      string
	Exception   string
}

type SQLColumnType 

type SQLColumnType int

SQLColumnType to store generic SQL column types 

const (
	SQLColumnTypeBool SQLColumnType = iota
	SQLColumnTypeByteA
	SQLColumnTypeInt
	SQLColumnTypeSerial
	SQLColumnTypeText
	SQLColumnTypeVarchar
	SQLColumnTypeTimeStamp
	SQLColumnTypeNumeric
	SQLColumnTypeJSON
	SQLColumnTypeBigInt
)

generic SQL column types

func (SQLColumnType) IsNumeric 

func (ct SQLColumnType) IsNumeric() bool

IsNumeric determines if an sqlColumnType is numeric

func (SQLColumnType) String 

func (ct SQLColumnType) String() string

type SQLConnection 

type SQLConnection struct {
	DBAdapter string
	DBURL     string
	DBSchema  string
	Log       *logging.Logger
}

SQLConnection stores parameters to build a new db connection & initialize the database

type SQLErrorType 

type SQLErrorType int

SQLErrorType stores generic SQL error types 

const (
	SQLErrorTypeDuplicatedSchema SQLErrorType = iota
	SQLErrorTypeDuplicatedColumn
	SQLErrorTypeDuplicatedTable
	SQLErrorTypeInvalidType
	SQLErrorTypeUndefinedTable
	SQLErrorTypeUndefinedColumn
	SQLErrorTypeGeneric
)

generic SQL error types

type SQLNames added in v0.26.0 

type SQLNames struct {
	Tables  SQLTableNames
	Columns SQLColumnNames
}

type SQLTable 

type SQLTable struct {
	Name    string
	Columns []*SQLTableColumn
	// Map of channel name -> columns to be sent as payload on that channel
	NotifyChannels map[string][]string
	// contains filtered or unexported fields
}

SQLTable contains the structure of a SQL table,

func (*SQLTable) GetColumn 

func (table *SQLTable) GetColumn(columnName string) *SQLTableColumn

type SQLTableColumn 

type SQLTableColumn struct {
	Name    string
	Type    SQLColumnType
	Primary bool
	// Length of variable column type where applicable 0 indicates variable/unbounded length
	Length int
}

SQLTableColumn contains the definition of a SQL table column, the Order is given to be able to sort the columns to be created

func (*SQLTableColumn) Equals 

func (col *SQLTableColumn) Equals(otherCol *SQLTableColumn) bool

func (*SQLTableColumn) String 

func (col *SQLTableColumn) String() string

type SQLTableNames added in v0.26.0 

type SQLTableNames struct {
	Log        string
	Dictionary string
	Block      string
	Tx         string
	ChainInfo  string
}

type UpsertDeleteQuery 

type UpsertDeleteQuery struct {
	Query    string
	Values   string
	Pointers []interface{}
}

UpsertDeleteQuery contains query and values to upsert or delete row data

Source Files

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