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table.go
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table.go
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package types
import (
"fmt"
"github.com/33cn/chain33/common/db"
"github.com/33cn/chain33/common/db/table"
"github.com/33cn/chain33/types"
)
/*
table struct
data: oracle
index: addr,status,index,type
*/
var opt = &table.Option{
Prefix: "LODB",
Name: "oracle",
Primary: "eventid",
Index: []string{"status", "addr_status", "type_status"},
}
//NewTable 新建表
func NewTable(kvdb db.KV) *table.Table {
rowmeta := NewOracleRow()
table, err := table.NewTable(rowmeta, kvdb, opt)
if err != nil {
panic(err)
}
return table
}
//OracleRow table meta 结构
type OracleRow struct {
*ReceiptOracle
}
//NewOracleRow 新建一个meta 结构
func NewOracleRow() *OracleRow {
return &OracleRow{ReceiptOracle: &ReceiptOracle{}}
}
//CreateRow 新建数据行(注意index 数据一定也要保存到数据中,不能就保存eventid)
func (tx *OracleRow) CreateRow() *table.Row {
return &table.Row{Data: &ReceiptOracle{}}
}
//SetPayload 设置数据
func (tx *OracleRow) SetPayload(data types.Message) error {
if txdata, ok := data.(*ReceiptOracle); ok {
tx.ReceiptOracle = txdata
return nil
}
return types.ErrTypeAsset
}
//Get 按照indexName 查询 indexValue
func (tx *OracleRow) Get(key string) ([]byte, error) {
if key == "eventid" {
return []byte(tx.EventID), nil
} else if key == "status" {
return []byte(fmt.Sprintf("%2d", tx.Status)), nil
} else if key == "addr_status" {
return []byte(fmt.Sprintf("%s:%2d", tx.Addr, tx.Status)), nil
} else if key == "type_status" {
return []byte(fmt.Sprintf("%s:%2d", tx.Type, tx.Status)), nil
}
return nil, types.ErrNotFound
}