erc20-subgraph/schema.graphql

#
# Main entities
#

type Token @entity {
  id: ID!               # Token address is used as ID

  " Token address "
  address: Bytes!

  #
  # Token data (from contract)
  #

  " Number of decimals the token uses "
  decimals: Int!

  " Human-readable name of the token "
  name: String!

  " Symbol of the token "
  symbol: String!

  #
  # Additinal data (from registry)
  #

  " Token description "
  description: String

  " Image URL "
  imageUrl: String

  #
  # TODO: Summary information
  #

  # " Number of token holders "
  # holderCount: BigInt!

  # " Total token supply "
  # totalSupply: BigDecimal!

  # totalMinted: BigDecimal

  # totalBurned: BigDecimal

  # events: [TokenEvent!]! @derivedFrom(field: "token")
}


#
# Events
#

interface TokenEvent {
  id: ID!               # Concatenation of block number and log ID
  token: Bytes!         # Used to derive relationships to Token
  amount: BigInt!
}

type BurnEvent implements TokenEvent @entity {
  id: ID!
  token: Bytes!
  amount: BigInt!
}

type MintEvent implements TokenEvent @entity {
  id: ID!
  token: Bytes!
  amount: BigInt!
}

type TransferEvent implements TokenEvent @entity {
  id: ID!
  token: Bytes!
  from: Bytes!
  to: Bytes!
  amount: BigInt!
}