I'd rather pay with with utility isEvenCoins, rather than with USD. Also, our entire stack is GraphQL-based, so we must have a GraphQL API according to this sc

I'd rather pay with with utility isEvenCoins, rather than with USD. Also, our entire stack is GraphQL-based, so we must have a GraphQL API according to this schema: schema { query: Query mutation: Mutation subscription: Subscription } type Query { balance: Int! isEven(input: isEvenInput!): isEvenPayload! } type Mutation { depositCoins(amount: Int!): DepositPayload! withdrawCoins(amount: Int!): WithdrawPayload! } type Subscription { coinsDeposited: Int! coinsWithdrawn: Int! coinsSpent: Int! } input isEvenInput { number: Int! gas: Int! } type isEvenPayload { result: bool balanceLeft: Int! isError: bool! errMsg: String } type DepositPayload { newBalance: Int! isError: bool! errMsg: String } type WithdrawPayload { newBalance: Int! isError: bool! errMsg: String }