coins
The coin objects that exist in the network.
The type field is a string of the inner type of the coin by which to
filter (e.g. 0x2::iota::IOTA). If no type is provided, it will
default to 0x2::iota::IOTA.
coins(
  first: Int
  after: String
  last: Int
  before: String
  type: String
): CoinConnection!