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ledger.go
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ledger.go
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package ledger
import (
"context"
"time"
ledgerpb "github.com/tron-us/go-btfs-common/protos/ledger"
"github.com/tron-us/go-btfs-common/crypto"
"github.com/tron-us/go-btfs-common/utils/grpc"
"github.com/tron-us/protobuf/proto"
ic "github.com/libp2p/go-libp2p-core/crypto"
)
const LedgerVersion = "BTFS_Escrow_1.0.0"
type Client struct {
addr string
}
func NewClient(addr string) *Client {
return &Client{addr: addr}
}
func NewAccount(pubKey ic.PubKey, amount int64) (*ledgerpb.Account, error) {
addr, err := ic.RawFull(pubKey)
if err != nil {
return nil, err
}
return &ledgerpb.Account{
Address: &ledgerpb.PublicKey{Key: addr},
Balance: amount,
}, nil
}
func NewChannelCommit(fromKey ic.PubKey, toKey ic.PubKey, amount int64) (*ledgerpb.ChannelCommit, error) {
fromAddr, err := ic.RawFull(fromKey)
if err != nil {
return nil, err
}
toAddr, err := ic.RawFull(toKey)
if err != nil {
return nil, err
}
return &ledgerpb.ChannelCommit{
Payer: &ledgerpb.PublicKey{Key: fromAddr},
Recipient: &ledgerpb.PublicKey{Key: toAddr},
Amount: amount,
PayerId: time.Now().UnixNano(),
}, err
}
func NewChannelState(id *ledgerpb.ChannelID, sequence int64, fromAccount *ledgerpb.Account, toAccount *ledgerpb.Account) *ledgerpb.ChannelState {
return &ledgerpb.ChannelState{
Id: id,
Sequence: sequence,
From: fromAccount,
To: toAccount,
}
}
func NewSignedChannelState(channelState *ledgerpb.ChannelState, fromSig []byte, toSig []byte) *ledgerpb.SignedChannelState {
return &ledgerpb.SignedChannelState{
Channel: channelState,
FromSignature: fromSig,
ToSignature: toSig,
}
}
func NewSignedChannelCommit(commit *ledgerpb.ChannelCommit, sig []byte) *ledgerpb.SignedChannelCommit {
return &ledgerpb.SignedChannelCommit{
Channel: commit,
Signature: sig,
}
}
func NewSignedCreateAccountRequest(key *ledgerpb.PublicKey, sig []byte) *ledgerpb.SignedCreateAccountRequest {
return &ledgerpb.SignedCreateAccountRequest{
Key: key,
Signature: sig,
ClientVersionNumber: LedgerVersion,
}
}
func (c *Client) ImportAccount(ctx context.Context, pubKey ic.PubKey) (*ledgerpb.Account, error) {
keyBytes, err := ic.RawFull(pubKey)
if err != nil {
return nil, err
}
var res *ledgerpb.CreateAccountResult
err = grpc.LedgerClient(c.addr).WithContext(ctx, func(ctx context.Context, client ledgerpb.ChannelsClient) error {
res, err = client.CreateAccount(ctx, &ledgerpb.PublicKey{Key: keyBytes})
return err
})
if err != nil {
return nil, err
}
return res.GetAccount(), nil
}
func (c *Client) ImportSignedAccount(ctx context.Context, privKey ic.PrivKey, pubKey ic.PubKey) (*ledgerpb.SignedCreateAccountResult, error) {
pubKeyBytes, err := ic.RawFull(pubKey)
if err != nil {
return nil, err
}
signedPubKey := &ledgerpb.PublicKey{Key: pubKeyBytes}
sigBytes, err := proto.Marshal(signedPubKey)
if err != nil {
return nil, err
}
signature, err := privKey.Sign(sigBytes)
if err != nil {
return nil, err
}
signedPubkey := NewSignedCreateAccountRequest(signedPubKey, signature)
var result *ledgerpb.SignedCreateAccountResult
err = grpc.LedgerClient(c.addr).WithContext(ctx, func(ctx context.Context, client ledgerpb.ChannelsClient) error {
result, err = client.SignedCreateAccount(ctx, signedPubkey)
return err
})
if err != nil {
return nil, err
}
return result, nil
}
func (c *Client) CreateChannel(ctx context.Context, channelCommit *ledgerpb.ChannelCommit, sig []byte) (*ledgerpb.ChannelID, error) {
var (
channelId *ledgerpb.ChannelID
err error
)
err = grpc.LedgerClient(c.addr).WithContext(ctx, func(ctx context.Context, client ledgerpb.ChannelsClient) error {
channelId, err = client.CreateChannel(ctx, &ledgerpb.SignedChannelCommit{
Channel: channelCommit,
Signature: sig,
})
return err
})
return channelId, err
}
func (c *Client) CloseChannel(ctx context.Context, signedChannelState *ledgerpb.SignedChannelState) error {
return grpc.LedgerClient(c.addr).WithContext(ctx, func(ctx context.Context, client ledgerpb.ChannelsClient) error {
_, err := client.CloseChannel(ctx, signedChannelState)
return err
})
}
func NewSignedPublicKey(privK ic.PrivKey, pubK ic.PubKey) (*ledgerpb.SignedPublicKey, error) {
raw, err := ic.RawFull(pubK)
if err != nil {
return nil, err
}
lgPubKey := &ledgerpb.PublicKey{
Key: raw,
}
sig, err := crypto.Sign(privK, lgPubKey)
if err != nil {
return nil, err
}
return &ledgerpb.SignedPublicKey{
Key: lgPubKey,
Signature: sig,
}, nil
}