
currencies 的表格行类型
{ "name": "currency", "base": "", "fields": [ { "name": "contract", "type": "name" }, { "name": "currency", "type": "asset" }, { "name": "fee", "type": "uint64" }, { "name": "maximum_fee", "type": "asset" }, { "name": "enabled", "type": "bool" } ] }