Query Node Manifest

Overview

Field	Type	Description
version	String	A Semver version indicating which version of this API is being used.
description	String	An optional description of the substrate chain.
hydraVersion	String	SemVer range of Hydra Processor used by the mappings.
indexerVersionRange	String	Semver version range of supported Hydra Indexers. If not set, same as hydraVersion
repository	String	An optional link to where the subgraph lives.
dataSources	Data Source Spec	Each data source spec defines the data that will be ingested
entities	String	Glob path to schema model files (with typeorm metadata)
typegen	TypeGen Spec	Specification for Typegen tool

Data Source

Field	Type	Description
kind	String	The type of data source. Possible values: substrate.
node	String	Chain name

Typegen

Field	Type	Description
metadata	String	The type of data source. Possible values: substrate.
metadata.source	String	Chain name
metadata.blockHash	String	block hash to from where the metadata is fetched
events	List	A list of event names for which the typescript classes will be generated
calls	List	A list of extrinsics to be generated
outDir	String	The root directory of the generated classes
customTypes.typedefsLoc	String	Location of the type definitions json

Mapping

The mapping field may be one of the following supported mapping manifests:

Field	Type	Description
mappingsModule	String	A JS module to be loaded by the processor (should have all the handler functions exported)
imports	List	A list of modules that should be additionally loaded by the processor (e.g. generated event and extrinsic classes)
range	String	A string representation of the block height range for the run (see Range rep for details)
eventHandlers	List of Handler Spec	Specification of event handlers
extrinsicHandlers	List of Handler Spec	Specification of extrinsic handlers
preBlockHooks	List of Handler Spec	Specification of hooks run before all the events in the block
postBlockHooks	List of Handler Spec	Specification of hooks run after all the events in the block

Handler

Field	Type	Description
handler	String	Handler name
event	String	(For eventHandlers only) An identifier for an event that will be handled in the mapping script.
extrinsic	String	(For extrinsicHandlers only) An identifier for an extrinsic that will be handled in the mapping script.
triggerEvents	String	(For extrinsicHandlers only) A list of event identifier that triggers the extrinsic handlers. Default: system.ExtrinsicSuccess
filter	Filter Spec	Additional filter specifying the condition for the handler to be triggered
filter.height	String	String representation of the block height range
filter.specVersion	String	Range of RuntimeVersion.specVersion. Useful when dealing with runtime upgrades

Range

Range is an open, semi-open, or closed interval. An interval can either be finite or infinite. It is represented by a string as below

From X to Y, inclusive: [X, Y]

From X to Y, exclusive: (X, Y)

From X (excl) to Y, incl: (X, Y]

From X (excl) to infinity: (X, )