lotus/chain/wallet/wallet.go

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package wallet
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import (
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"sort"
"strings"
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"github.com/filecoin-project/go-bls-sigs"
"github.com/minio/blake2b-simd"
"golang.org/x/xerrors"
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"github.com/filecoin-project/go-lotus/chain/address"
"github.com/filecoin-project/go-lotus/chain/types"
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"github.com/filecoin-project/go-lotus/lib/crypto"
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)
const (
KNamePrefix = "wallet-"
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)
type Wallet struct {
keys map[address.Address]*Key
keystore types.KeyStore
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}
func NewWallet(keystore types.KeyStore) (*Wallet, error) {
w := &Wallet{
keys: make(map[address.Address]*Key),
keystore: keystore,
}
return w, nil
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}
func (w *Wallet) Sign(addr address.Address, msg []byte) (*types.Signature, error) {
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ki, err := w.findKey(addr)
if err != nil {
return nil, err
}
switch ki.Type {
case types.KTSecp256k1:
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b2sum := blake2b.Sum256(msg)
sig, err := crypto.Sign(ki.PrivateKey, b2sum[:])
if err != nil {
return nil, err
}
return &types.Signature{
Type: types.KTSecp256k1,
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Data: sig,
}, nil
case types.KTBLS:
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var pk bls.PrivateKey
copy(pk[:], ki.PrivateKey)
sig := bls.PrivateKeySign(pk, msg)
return &types.Signature{
Type: types.KTBLS,
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Data: sig[:],
}, nil
default:
panic("cant do it sir")
}
}
func (w *Wallet) findKey(addr address.Address) (*Key, error) {
k, ok := w.keys[addr]
if ok {
return k, nil
}
ki, err := w.keystore.Get(KNamePrefix + addr.String())
if err != nil {
return nil, xerrors.Errorf("getting from keystore: %w", err)
}
k, err = NewKey(ki)
if err != nil {
return nil, xerrors.Errorf("decoding from keystore: %w", err)
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}
w.keys[k.Address] = k
return k, nil
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}
func (w *Wallet) Export(addr address.Address) ([]byte, error) {
panic("nyi")
}
func (w *Wallet) Import(kdata []byte) (address.Address, error) {
panic("nyi")
}
func (w *Wallet) ListAddrs() ([]address.Address, error) {
all, err := w.keystore.List()
if err != nil {
return nil, xerrors.Errorf("listing keystore: %w", err)
}
sort.Strings(all)
out := make([]address.Address, 0, len(all))
for _, a := range all {
if strings.HasPrefix(a, KNamePrefix) {
name := strings.TrimPrefix(a, KNamePrefix)
addr, err := address.NewFromString(name)
if err != nil {
return nil, xerrors.Errorf("converting name to address: %w", err)
}
out = append(out, addr)
}
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}
return out, nil
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}
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func (w *Wallet) GenerateKey(typ string) (address.Address, error) {
var k *Key
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switch typ {
case types.KTSecp256k1:
priv, err := crypto.GenerateKey()
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if err != nil {
return address.Undef, err
}
ki := types.KeyInfo{
Type: typ,
PrivateKey: priv,
}
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k, err = NewKey(ki)
if err != nil {
return address.Undef, err
}
case types.KTBLS:
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priv := bls.PrivateKeyGenerate()
ki := types.KeyInfo{
Type: typ,
PrivateKey: priv[:],
}
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var err error
k, err = NewKey(ki)
if err != nil {
return address.Undef, err
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}
default:
return address.Undef, xerrors.Errorf("invalid key type: %s", typ)
}
err := w.keystore.Put(KNamePrefix+k.Address.String(), k.KeyInfo)
if err != nil {
return address.Undef, xerrors.Errorf("saving to keystore: %w", err)
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}
w.keys[k.Address] = k
return k.Address, nil
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}
type Key struct {
types.KeyInfo
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PublicKey []byte
Address address.Address
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}
func NewKey(keyinfo types.KeyInfo) (*Key, error) {
k := &Key{
KeyInfo: keyinfo,
}
switch k.Type {
case types.KTSecp256k1:
k.PublicKey = crypto.PublicKey(k.PrivateKey)
var err error
k.Address, err = address.NewSecp256k1Address(k.PublicKey)
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if err != nil {
return nil, xerrors.Errorf("converting Secp256k1 to address: %w", err)
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}
case types.KTBLS:
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var pk bls.PrivateKey
copy(pk[:], k.PrivateKey)
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pub := bls.PrivateKeyPublicKey(pk)
k.PublicKey = pub[:]
var err error
k.Address, err = address.NewBLSAddress(k.PublicKey)
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if err != nil {
return nil, xerrors.Errorf("converting BLS to address: %w", err)
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}
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default:
return nil, xerrors.Errorf("unknown key type")
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}
return k, nil
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}