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fix: gob: type elliptic.p256Curve has no exported fields. #95

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fix: gob: type elliptic.p256Curve has no exported fields. #95

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54 changes: 45 additions & 9 deletions wallets.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,21 +2,29 @@ package main

import (
"bytes"
"crypto/ecdsa"
"crypto/elliptic"
"encoding/gob"
"fmt"
"io/ioutil"
"log"
"math/big"
"os"
)

const walletFile = "wallet_%s.dat"

// Wallets stores a collection of wallets
type Wallets struct {
Wallets map[string]*Wallet
}

// SerializableWallet Solve gob: type elliptic.p256Curve has no exported fields
type SerializableWallet struct {
D *big.Int
X, Y *big.Int
PublicKey []byte
}

// NewWallets creates Wallets and fills it from a file if it exists
func NewWallets(nodeID string) (*Wallets, error) {
wallets := Wallets{}
Expand Down Expand Up @@ -55,7 +63,9 @@ func (ws Wallets) GetWallet(address string) Wallet {

// LoadFromFile loads wallets from the file
func (ws *Wallets) LoadFromFile(nodeID string) error {

walletFile := fmt.Sprintf(walletFile, nodeID)
//fmt.Println(walletFile)
if _, err := os.Stat(walletFile); os.IsNotExist(err) {
return err
}
Expand All @@ -65,15 +75,29 @@ func (ws *Wallets) LoadFromFile(nodeID string) error {
log.Panic(err)
}

var wallets Wallets
gob.Register(elliptic.P256())
var wallets map[string]SerializableWallet
//gob.Register(elliptic.P256())
gob.Register(SerializableWallet{})
decoder := gob.NewDecoder(bytes.NewReader(fileContent))
err = decoder.Decode(&wallets)
if err != nil {
log.Panic(err)
}

ws.Wallets = wallets.Wallets
ws.Wallets = make(map[string]*Wallet)
//ws.Wallets = wallets.Wallets
for k, v := range wallets {
ws.Wallets[k] = &Wallet{
PrivateKey: ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: elliptic.P256(),
X: v.X,
Y: v.Y,
},
D: v.D,
},
PublicKey: v.PublicKey,
}
}

return nil
}
Expand All @@ -82,17 +106,29 @@ func (ws *Wallets) LoadFromFile(nodeID string) error {
func (ws Wallets) SaveToFile(nodeID string) {
var content bytes.Buffer
walletFile := fmt.Sprintf(walletFile, nodeID)

gob.Register(elliptic.P256())
//fmt.Println(walletFile)

gob.Register(SerializableWallet{})

wallets := make(map[string]SerializableWallet)
for k, v := range ws.Wallets {
wallets[k] = SerializableWallet{
D: v.PrivateKey.D,
X: v.PrivateKey.PublicKey.X,
Y: v.PrivateKey.PublicKey.Y,
PublicKey: v.PublicKey,
}
}

encoder := gob.NewEncoder(&content)
err := encoder.Encode(ws)
err := encoder.Encode(wallets)
if err != nil {
log.Panic(err)
}

err = ioutil.WriteFile(walletFile, content.Bytes(), 0644)
err = os.WriteFile(walletFile, content.Bytes(), 0644)
if err != nil {
log.Panic(err)
}

}