94 lines
1.9 KiB
Go
94 lines
1.9 KiB
Go
package main
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import (
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"bytes"
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"crypto/elliptic"
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"encoding/gob"
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"fmt"
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"io/ioutil"
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"os"
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)
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const version = byte(0x00)
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const walletFile = "wallet.dat"
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const addressChecksumLen = 4
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// Wallets is pretty self-explanatory
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type Wallets struct {
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Wallets map[string]*Wallet
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}
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// NewWallets creates Wallets and fills it from a file if it exists
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func NewWallets() (*Wallets, error) {
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wallets := Wallets{}
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wallets.Wallets = make(map[string]*Wallet)
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err := wallets.LoadFromFile()
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return &wallets, err
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}
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// CreateWallet adds a Wallet to Wallets
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func (ws *Wallets) CreateWallet() string {
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wallet := NewWallet()
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address := fmt.Sprintf("%s", wallet.GetAddress())
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ws.Wallets[address] = wallet
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return address
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}
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// GetAddresses returns an array of addresses stored in the wallet file
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func (ws *Wallets) GetAddresses() []string {
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var addresses []string
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for address := range ws.Wallets {
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addresses = append(addresses, address)
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}
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return addresses
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}
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// GetWallet returns a wallet by its address
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func (ws Wallets) GetWallet(address string) Wallet {
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return *ws.Wallets[address]
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}
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// LoadFromFile loads wallets from the file
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func (ws *Wallets) LoadFromFile() error {
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if _, err := os.Stat(walletFile); os.IsNotExist(err) {
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return err
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}
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fileContent, err := ioutil.ReadFile(walletFile)
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if err != nil {
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exitWithError(err)
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}
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var wallets Wallets
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gob.Register(elliptic.P256())
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decoder := gob.NewDecoder(bytes.NewReader(fileContent))
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err = decoder.Decode(&wallets)
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if err != nil {
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exitWithError(err)
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}
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ws.Wallets = wallets.Wallets
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return nil
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}
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// SaveToFile saves the wallets to a file
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func (ws Wallets) SaveToFile() {
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var content bytes.Buffer
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gob.Register(elliptic.P256())
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encoder := gob.NewEncoder(&content)
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err := encoder.Encode(ws)
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if err != nil {
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exitWithError(err)
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}
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err = ioutil.WriteFile(walletFile, content.Bytes(), 0644)
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if err != nil {
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exitWithError(err)
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}
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}
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