github.com/linapex/ethereum-go-chinese@v0.0.0-20190316121929-f8b7a73c3fa1/signer/storage/storage.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 19:16:42</date>
    10  //</624450111136600064>
    11  
    12  //
    13  
    14  package storage
    15  
    16  import (
    17  	"fmt"
    18  )
    19  
    20  type Storage interface {
    21  //按键存储值。0长度键导致无操作
    22  	Put(key, value string)
    23  //get返回以前存储的值，如果该值不存在或键的长度为0，则返回空字符串
    24  	Get(key string) string
    25  }
    26  
    27  //短暂存储是一种内存存储，它可以
    28  //不将值持久化到磁盘。主要用于测试
    29  type EphemeralStorage struct {
    30  	data      map[string]string
    31  	namespace string
    32  }
    33  
    34  func (s *EphemeralStorage) Put(key, value string) {
    35  	if len(key) == 0 {
    36  		return
    37  	}
    38  	fmt.Printf("storage: put %v -> %v\n", key, value)
    39  	s.data[key] = value
    40  }
    41  
    42  func (s *EphemeralStorage) Get(key string) string {
    43  	if len(key) == 0 {
    44  		return ""
    45  	}
    46  	fmt.Printf("storage: get %v\n", key)
    47  	if v, exist := s.data[key]; exist {
    48  		return v
    49  	}
    50  	return ""
    51  }
    52  
    53  func NewEphemeralStorage() Storage {
    54  	s := &EphemeralStorage{
    55  		data: make(map[string]string),
    56  	}
    57  	return s
    58  }
    59