schema.graphql

type Account @entity {
    id: ID! # Set to `Account.address.toHexString()`
    asErc20: Erc20Contract
    Erc20balances: [Erc20Balance!]! @derivedFrom(field: "account")
    Erc20approvalsOwner: [Erc20Approval!]! @derivedFrom(field: "owner")
    Erc20approvalsSpender: [Erc20Approval!]! @derivedFrom(field: "spender")
    Erc20transferFromEvent: [Erc20Transfer!]! @derivedFrom(field: "from")
    Erc20transferToEvent: [Erc20Transfer!]! @derivedFrom(field: "to")
    events: [Event!]! @derivedFrom(field: "emitter")
}

type Erc20Contract @entity(immutable: true) {
    id: ID! # Set to `Erc20Contract.address.toHexString()`
    asAccount: Account!
    name: String
    symbol: String
    decimals: Int!
    totalSupply: Erc20Balance!
    balances: [Erc20Balance!]! @derivedFrom(field: "contract")
    approvals: [Erc20Approval!]! @derivedFrom(field: "contract")
    transfers: [Erc20Transfer!]! @derivedFrom(field: "contract")
}

type Erc20Balance @entity {
    id: ID! # Set to `contract.id + '-' + (account ? account.id : 'totalSupply')`
    contract: Erc20Contract!
    account: Account
    value: BigDecimal!
    valueExact: BigInt!
    transferFromEvent: [Erc20Transfer!]! @derivedFrom(field: "fromBalance")
    transferToEvent: [Erc20Transfer!]! @derivedFrom(field: "toBalance")
}

type Erc20Approval @entity {
    id: ID! # Set to `contract.id + '-' + owner.id + '-' + spender.id`
    contract: Erc20Contract!
    owner: Account!
    spender: Account!
    value: BigDecimal!
    valueExact: BigInt!
}

type Erc20Transfer implements Event @entity(immutable: true) {
    id: ID! # Set to `transaction.id + '-' + event.logIndex.toString()`
    emitter: Account!
    transaction: Transaction!
    timestamp: BigInt!
    contract: Erc20Contract!
    from: Account
    fromBalance: Erc20Balance
    to: Account
    toBalance: Erc20Balance
    value: BigDecimal!
    valueExact: BigInt!
}

interface Event {
    id: ID!
    transaction: Transaction!
    emitter: Account!
    timestamp: BigInt!
}

type Transaction @entity(immutable: true) {
    id: ID! # Set to `event.transaction.hash.toHexString()`
    timestamp: BigInt!
    blockNumber: BigInt!
    events: [Event!]! @derivedFrom(field: "transaction")
}