#
# Main entities
#

type Account @entity {
  id: ID!
  address: Bytes!
}

type AccountBalance @entity {
  id: ID!
  account: Account!
  token: Token!
  amount: BigDecimal!
}

# This entity is used to provide information about evolution of account balances
type AccountBalanceLog @entity {
  id: ID!
  account: Account!
  token: Token!
  amount: BigDecimal!

  event: TokenEvent

  block: BigInt!
  transaction: Bytes!
  timestamp: BigInt!
}

type Token @entity {
  id: ID!

  " Token address "
  address: Bytes!

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

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

  " Symbol of the token "
  symbol: String!

  " Token description "
  description: String

  " Image URL "
  imageUrl: String

  " Token flags"
  flags: [String!]!

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

  # TODO: Total token supply
  # totalSupply: BigDecimal!

  # TODO:
  # totalMinted: BigDecimal

  # TODO:
  # totalBurned: BigDecimal

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

#
# Events
#

interface TokenEvent @entity {
  id: ID!
  token: Token!
  amount: BigDecimal!
  sender: Bytes!

  block: BigInt!
  timestamp: BigInt!
  transaction: Bytes!
}

type BurnEvent implements TokenEvent @entity {
  id: ID!

  " Token address "
  token: Token!

  " Quantity of tokens burned "
  amount: BigDecimal!

  " Transaction sender address "
  sender: Bytes!

  " Address of burner account "
  burner: Bytes!

  " Block number "
  block: BigInt!

  " Event timestamp "
  timestamp: BigInt!

  " Transaction hash "
  transaction: Bytes!
}

type MintEvent implements TokenEvent @entity {
  id: ID!

  " Token address "
  token: Token!

  " Quantity of tokens minted "
  amount: BigDecimal!

  " Transaction sender address "
  sender: Bytes!

  " Address of minter account "
  minter: Bytes!

  " Address of destination account "
  destination: Bytes!

  " Block number "
  block: BigInt!

  " Event timestamp "
  timestamp: BigInt!

  " Transaction hash "
  transaction: Bytes!
}

type TransferEvent implements TokenEvent @entity {
  id: ID!

  " Token address "
  token: Token!

  " Quantity of tokens transferred "
  amount: BigDecimal!

  " Transaction sender address "
  sender: Bytes!

  " Address of source account "
  source: Bytes!

  " Address of destination account "
  destination: Bytes!

  " Block number "
  block: BigInt!

  " Event timestamp "
  timestamp: BigInt!

  " Transaction hash "
  transaction: Bytes!
}