schema.graphql

# Define a Transfer type representing the transfer of tokens
type Transfer @entity(immutable: true) {
  id: ID! # Unique identifier for the transfer entity
  from: Account! # Reference to the Account entity sending the tokens
  to: Account! # Reference to the Account entity receiving the tokens
  value: BigInt! # Amount of tokens transferred
  timestamp: BigInt! # Timestamp when the transfer occurred
}

# Define an Account type representing a user account
type Account @entity {
  id: ID! # Unique identifier for the account entity
  sentTransfers: [Transfer!]! @derivedFrom(field: "from") # Array of transfers sent by the account # Use @derivedFrom to create a relationship from Transfer 'from' field
  receivedTransfers: [Transfer!]! @derivedFrom(field: "to") # Array of transfers received by the account # Use @derivedFrom to create a relationship from Transfer 'to' field
  totalSent: BigInt! # Total amount of tokens sent by the account
  totalReceived: BigInt! # Total amount of tokens received by the account
  sentCount: Int! # Number of transfers sent by the account
  receivedCount: Int! # Number of transfers received by the account
}