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wallets.go
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wallets.go
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package main
import (
"bytes"
"crypto/elliptic"
"encoding/gob"
"fmt"
"io/ioutil"
"log"
"os"
)
type Wallets struct {
Wallets map[string]*Wallet
}
func NewWallets() (*Wallets, error) {
wallets := Wallets{}
wallets.Wallets = make(map[string]*Wallet)
err := wallets.LoadFromFile()
return &wallets, err
}
func (ws *Wallets) CreateWallet() string {
wallet := NewWallet()
address := fmt.Sprintf("%s", wallet.GetAddress())
ws.Wallets[address] = wallet
return address
}
func (ws *Wallets) GetAddresses() []string {
var addresses []string
for address := range ws.Wallets {
addresses = append(addresses, address)
}
return addresses
}
func (ws *Wallets) LoadFromFile() error {
if _, err := os.Stat(walletFile); os.IsNotExist(err) {
return err
}
fileContent, err := ioutil.ReadFile(walletFile)
if err != nil {
log.Panic(err)
}
var wallets Wallets
gob.Register(elliptic.P256())
decoder := gob.NewDecoder(bytes.NewReader(fileContent))
err = decoder.Decode(&wallets)
if err != nil {
log.Panic(err)
}
ws.Wallets = wallets.Wallets
return nil
}
func (ws Wallets) SaveToFile() {
var content bytes.Buffer
gob.Register(elliptic.P256())
encoder := gob.NewEncoder(&content)
err := encoder.Encode(ws)
if err != nil {
log.Panic(err)
}
err = ioutil.WriteFile(walletFile, content.Bytes(), 0644)
if err != nil {
log.Panic(err)
}
}
func (ws Wallets) GetWallet(address string) Wallet {
return *ws.Wallets[address]
}