dappservicex 合约 概览 操作 (9) 结构体 (16) 表 (5) 应用二进制接口 结构体 (16) pricing 的结构体属性 package { "name": "pricing", "base": "", "fields": [ { "name": "action", "type": "name" }, { "name": "cost_per_action", "type": "uint64" } ] }