Avalanche Manifest File

The Manifest project.yaml file can be seen as an entry point of your project and it defines most of the details on how SubQuery will index and transform the chain data. It clearly indicates where we are indexing data from, and to what on chain events we are subscribing to.

The Manifest can be in either YAML or JSON format. In this document, we will use YAML in all the examples.

Below is a standard example of a basic Avalanche project.yaml.

specVersion: 1.0.0
name: avalanche-subql-starter
version: 0.0.1
runner:
  node:
    name: "@subql/node-avalanche"
    version: latest
  query:
    name: "@subql/query"
    version: latest
description: "This project can be use as a starting point for developing your Avalanche based SubQuery project"
repository: https://github.com/subquery/avalanche-subql-starter
schema:
  file: ./schema.graphql
network:
  chainId: "mainnet"
  subnet: "C"
  # This endpoint must be a public non-pruned archive node
  # Public nodes may be rate limited, which can affect indexing speed
  # When developing your project we suggest getting a private API key
  # You can get them from OnFinality for free https://app.onfinality.io
  # https://documentation.onfinality.io/support/the-enhanced-api-service
  # If using an OnFinality Endpoint, you should append the API key like so:
  # endpoint: "https://avalanche.api.onfinality.io?apikey=xxxxx-xxxxx-xxxxxx-xxxxxxxx"
  # Note that we currently only support HTTP endpoints (not Websockets)
  endpoint: "https://avalanche.api.onfinality.io/public"
  # Optionally provide the HTTP endpoint of a full chain dictionary to speed up processing
  dictionary: https://api.subquery.network/sq/subquery/avalanche-dictionary
dataSources:
  - kind: avalanche/Runtime
    startBlock: 1 # Block to start indexing from
    options:
      # Must be a key of assets
      abi: erc20
      ## Pangolin token https://snowtrace.io/token/0x60781c2586d68229fde47564546784ab3faca982
      address: "0x60781C2586D68229fde47564546784ab3fACA982"
    assets:
      erc20:
        file: "IPangolinERC20.json"
    mapping:
      file: ./dist/index.js
      handlers:
        - handler: handleBlock
          kind: avalanche/BlockHandler
        - handler: handleTransaction
          kind: avalanche/TransactionHandler
          filter:
            ## The function can either be the function fragment or signature
            # function: '0x095ea7b3'
            # function: '0x7ff36ab500000000000000000000000000000000000000000000000000000000'
            function: approve(address spender, uint256 rawAmount)
            ## from: "0x60781C2586D68229fde47564546784ab3fACA982"
        - handler: handleLog
          kind: avalanche/LogHandler
          filter:
            topics:
              ## Follows standard log filters https://docs.ethers.io/v5/concepts/events/
              - Transfer(address indexed from, address indexed to, uint256 amount)

Overview

Top Level Spec

FieldTypeDescription
specVersionStringThe spec version of the manifest file
nameStringName of your project
versionStringVersion of your project
descriptionStringDiscription of your project
repositoryStringGit repository address of your project
schemaSchema SpecThe location of your GraphQL schema file
networkNetwork SpecDetail of the network to be indexed
dataSourcesDataSource SpecThe datasource to your project
templatesTemplates SpecAllows creating new datasources from this templates
runnerRunner SpecRunner specs info

Schema Spec

FieldTypeDescription
fileStringThe location of your GraphQL schema file

Network Spec

If you start your project by using the subql init command, you'll generally receive a starter project with the correct network settings. If you are changing the target chain of an existing project, you'll need to edit the Network Spec section of this manifest.

The chainId is the network identifier of the blockchain. Examples in Avalanche might be mainnet.

Additionally you will need to update the endpoint. This defines the wss endpoint of the blockchain to be indexed - this must be a full archive node. Public nodes may be rate limited which can affect indexing speed, when developing your project we suggest getting a private API key. You can retrieve endpoints for all parachains for free from OnFinalityopen in new window

FieldTypeDescription
chainIdStringA network identifier for the blockchain
endpointStringDefines the wss or ws endpoint of the blockchain to be indexed - This must be a full archive node. You can retrieve endpoints for all parachains for free from OnFinalityopen in new window
portNumberOptional port number on the endpoint to connect to
dictionaryStringIt is suggested to provide the HTTP endpoint of a full chain dictionary to speed up processing - read how a SubQuery Dictionary works.
bypassBlocksArrayBypasses stated block numbers, the values can be a range(e.g. "10- 50") or integer, see Bypass Blocks

Runner Spec

FieldTypeDescription
nodeRunner node specDescribe the node service use for indexing
queryRunner query specDescribe the query service

Runner Node Spec

FieldTypeDescription
nameString@subql/node-avalanche
versionStringVersion of the indexer Node service, it must follow the SEMVERopen in new window rules or latest, you can also find available versions in subquery SDK releasesopen in new window

Runner Query Spec

FieldTypeDescription
nameString@subql/query
versionStringVersion of the Query service, available versions can be found hereopen in new window, it also must follow the SEMVER rules or latest.

Datasource Spec

Defines the data that will be filtered and extracted and the location of the mapping function handler for the data transformation to be applied.

FieldTypeDescription
kindstringavalanche/Runtime
startBlockIntegerThis changes your indexing start block, set this higher to skip initial blocks with less data
mappingMapping Spec

Mapping Spec

FieldTypeDescription
handlers & filtersDefault handlers and filtersList all the mapping functions and their corresponding handler types, with additional mapping filters.

Data Sources and Mapping

In this section, we will talk about the default Avalanche runtime and its mapping. Here is an example:

dataSources:
  - kind: avalanche/Runtime # Indicates that this is default runtime
    startBlock: 1 # This changes your indexing start block, set this higher to skip initial blocks with less data
    mapping:
      file: dist/index.js # Entry path for this mapping
      ...

Mapping Handlers and Filters

The following table explains filters supported by different handlers.

Your SubQuery project will be much more efficient when you only use TransactionHandler or LogHandler handlers with appropriate mapping filters (e.g. NOT a BlockHandler).

HandlerSupported filter
avalanche/BlockHandlermodulo, timestamp
avalanche/TransactionHandlerfunction filters (either be the function fragment or signature), from (address), to (address)
avalanche/LogHandlertopics filters, and address

Default runtime mapping filters are an extremely useful feature to decide what block, event, or extrinsic will trigger a mapping handler.

Only incoming data that satisfies the filter conditions will be processed by the mapping functions. Mapping filters are optional but are highly recommended as they significantly reduce the amount of data processed by your SubQuery project and will improve indexing performance.

The modulo filter allows handling every N blocks, which is useful if you want to group or calculate data at a set interval. The following example shows how to use this filter.

filter:
  modulo: 50 # Index every 50 blocks: 0, 50, 100, 150....

Bypass Blocks

Bypass Blocks allows you to skip the stated blocks, this is useful when there are erroneous blocks in the chain or when a chain skips a block after an outage or a hard fork. It accepts both a range or single integer entry in the array.

When declaring a range use an string in the format of "start - end". Both start and end are inclusive, e.g. a range of "100-102" will skip blocks 100, 101, and 102.

network:
  chainId: "mainnet"
  subnet: "C"
  endpoint: "https://avalanche.api.onfinality.io/public"
  dictionary: https://api.subquery.network/sq/subquery/avalanche-dictionary
  bypassBlocks: [1, 2, 3, "105-200", 290]

Validating

You can validate your project manifest by running subql validate. This will check that it has the correct structure, valid values where possible and provide useful feedback as to where any fixes should be made.