mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-25 13:07:17 +00:00
4d300e4dec
This change imports the Swarm protocol codebase. Compared to the 'swarm' branch, a few mostly cosmetic changes had to be made: * The various redundant log message prefixes are gone. * All files now have LGPLv3 license headers. * Minor code changes were needed to please go vet and make the tests pass on Windows. * Further changes were required to adapt to the go-ethereum develop branch and its new Go APIs. Some code has not (yet) been brought over: * swarm/cmd/bzzhash: will reappear as cmd/bzzhash later * swarm/cmd/bzzup.sh: will be reimplemented in cmd/bzzup * swarm/cmd/makegenesis: will reappear somehow * swarm/examples/album: will move to a separate repository * swarm/examples/filemanager: ditto * swarm/examples/files: will not be merged * swarm/test/*: will not be merged * swarm/services/swear: will reappear as contracts/swear when needed
284 lines
9.7 KiB
Go
284 lines
9.7 KiB
Go
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package swap
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"fmt"
|
|
"math/big"
|
|
"os"
|
|
"path/filepath"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/accounts/abi/bind"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/contracts/chequebook"
|
|
"github.com/ethereum/go-ethereum/contracts/chequebook/contract"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/logger/glog"
|
|
"github.com/ethereum/go-ethereum/swarm/services/swap/swap"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
// SwAP Swarm Accounting Protocol with
|
|
// SWAP^2 Strategies of Withholding Automatic Payments
|
|
// SWAP^3 Accreditation: payment via credit SWAP
|
|
// using chequebook pkg for delayed payments
|
|
// default parameters
|
|
|
|
var (
|
|
autoCashInterval = 300 * time.Second // default interval for autocash
|
|
autoCashThreshold = big.NewInt(50000000000000) // threshold that triggers autocash (wei)
|
|
autoDepositInterval = 300 * time.Second // default interval for autocash
|
|
autoDepositThreshold = big.NewInt(50000000000000) // threshold that triggers autodeposit (wei)
|
|
autoDepositBuffer = big.NewInt(100000000000000) // buffer that is surplus for fork protection etc (wei)
|
|
buyAt = big.NewInt(20000000000) // maximum chunk price host is willing to pay (wei)
|
|
sellAt = big.NewInt(20000000000) // minimum chunk price host requires (wei)
|
|
payAt = 100 // threshold that triggers payment {request} (units)
|
|
dropAt = 10000 // threshold that triggers disconnect (units)
|
|
)
|
|
|
|
const (
|
|
chequebookDeployRetries = 5
|
|
chequebookDeployDelay = 1 * time.Second // delay between retries
|
|
)
|
|
|
|
type SwapParams struct {
|
|
*swap.Params
|
|
*PayProfile
|
|
}
|
|
|
|
type SwapProfile struct {
|
|
*swap.Profile
|
|
*PayProfile
|
|
}
|
|
|
|
type PayProfile struct {
|
|
PublicKey string // check against signature of promise
|
|
Contract common.Address // address of chequebook contract
|
|
Beneficiary common.Address // recipient address for swarm sales revenue
|
|
privateKey *ecdsa.PrivateKey
|
|
publicKey *ecdsa.PublicKey
|
|
owner common.Address
|
|
chbook *chequebook.Chequebook
|
|
lock sync.RWMutex
|
|
}
|
|
|
|
func DefaultSwapParams(contract common.Address, prvkey *ecdsa.PrivateKey) *SwapParams {
|
|
pubkey := &prvkey.PublicKey
|
|
return &SwapParams{
|
|
PayProfile: &PayProfile{
|
|
PublicKey: common.ToHex(crypto.FromECDSAPub(pubkey)),
|
|
Contract: contract,
|
|
Beneficiary: crypto.PubkeyToAddress(*pubkey),
|
|
privateKey: prvkey,
|
|
publicKey: pubkey,
|
|
owner: crypto.PubkeyToAddress(*pubkey),
|
|
},
|
|
Params: &swap.Params{
|
|
Profile: &swap.Profile{
|
|
BuyAt: buyAt,
|
|
SellAt: sellAt,
|
|
PayAt: uint(payAt),
|
|
DropAt: uint(dropAt),
|
|
},
|
|
Strategy: &swap.Strategy{
|
|
AutoCashInterval: autoCashInterval,
|
|
AutoCashThreshold: autoCashThreshold,
|
|
AutoDepositInterval: autoDepositInterval,
|
|
AutoDepositThreshold: autoDepositThreshold,
|
|
AutoDepositBuffer: autoDepositBuffer,
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// swap constructor, parameters
|
|
// * global chequebook, assume deployed service and
|
|
// * the balance is at buffer.
|
|
// swap.Add(n) called in netstore
|
|
// n > 0 called when sending chunks = receiving retrieve requests
|
|
// OR sending cheques.
|
|
// n < 0 called when receiving chunks = receiving delivery responses
|
|
// OR receiving cheques.
|
|
|
|
func NewSwap(local *SwapParams, remote *SwapProfile, backend chequebook.Backend, proto swap.Protocol) (self *swap.Swap, err error) {
|
|
var (
|
|
ctx = context.TODO()
|
|
ok bool
|
|
in *chequebook.Inbox
|
|
out *chequebook.Outbox
|
|
)
|
|
|
|
// check if remote chequebook is valid
|
|
// insolvent chequebooks suicide so will signal as invalid
|
|
// TODO: monitoring a chequebooks events
|
|
ok, err = chequebook.ValidateCode(ctx, backend, remote.Contract)
|
|
if !ok {
|
|
glog.V(logger.Info).Infof("invalid contract %v for peer %v: %v)", remote.Contract.Hex()[:8], proto, err)
|
|
} else {
|
|
// remote contract valid, create inbox
|
|
in, err = chequebook.NewInbox(local.privateKey, remote.Contract, local.Beneficiary, crypto.ToECDSAPub(common.FromHex(remote.PublicKey)), backend)
|
|
if err != nil {
|
|
glog.V(logger.Warn).Infof("unable to set up inbox for chequebook contract %v for peer %v: %v)", remote.Contract.Hex()[:8], proto, err)
|
|
}
|
|
}
|
|
|
|
// check if local chequebook contract is valid
|
|
ok, err = chequebook.ValidateCode(ctx, backend, local.Contract)
|
|
if !ok {
|
|
glog.V(logger.Warn).Infof("unable to set up outbox for peer %v: chequebook contract (owner: %v): %v)", proto, local.owner.Hex(), err)
|
|
} else {
|
|
out = chequebook.NewOutbox(local.Chequebook(), remote.Beneficiary)
|
|
}
|
|
|
|
pm := swap.Payment{
|
|
In: in,
|
|
Out: out,
|
|
Buys: out != nil,
|
|
Sells: in != nil,
|
|
}
|
|
self, err = swap.New(local.Params, pm, proto)
|
|
if err != nil {
|
|
return
|
|
}
|
|
// remote profile given (first) in handshake
|
|
self.SetRemote(remote.Profile)
|
|
var buy, sell string
|
|
if self.Buys {
|
|
buy = "purchase from peer enabled at " + remote.SellAt.String() + " wei/chunk"
|
|
} else {
|
|
buy = "purchase from peer disabled"
|
|
}
|
|
if self.Sells {
|
|
sell = "selling to peer enabled at " + local.SellAt.String() + " wei/chunk"
|
|
} else {
|
|
sell = "selling to peer disabled"
|
|
}
|
|
glog.V(logger.Warn).Infof("SWAP arrangement with <%v>: %v; %v)", proto, buy, sell)
|
|
|
|
return
|
|
}
|
|
|
|
func (self *SwapParams) Chequebook() *chequebook.Chequebook {
|
|
defer self.lock.Unlock()
|
|
self.lock.Lock()
|
|
return self.chbook
|
|
}
|
|
|
|
func (self *SwapParams) PrivateKey() *ecdsa.PrivateKey {
|
|
return self.privateKey
|
|
}
|
|
|
|
// func (self *SwapParams) PublicKey() *ecdsa.PublicKey {
|
|
// return self.publicKey
|
|
// }
|
|
|
|
func (self *SwapParams) SetKey(prvkey *ecdsa.PrivateKey) {
|
|
self.privateKey = prvkey
|
|
self.publicKey = &prvkey.PublicKey
|
|
}
|
|
|
|
// setChequebook(path, backend) wraps the
|
|
// chequebook initialiser and sets up autoDeposit to cover spending.
|
|
func (self *SwapParams) SetChequebook(ctx context.Context, backend chequebook.Backend, path string) error {
|
|
self.lock.Lock()
|
|
contract := self.Contract
|
|
self.lock.Unlock()
|
|
|
|
valid, err := chequebook.ValidateCode(ctx, backend, contract)
|
|
if err != nil {
|
|
return err
|
|
} else if valid {
|
|
return self.newChequebookFromContract(path, backend)
|
|
}
|
|
return self.deployChequebook(ctx, backend, path)
|
|
}
|
|
|
|
func (self *SwapParams) deployChequebook(ctx context.Context, backend chequebook.Backend, path string) error {
|
|
opts := bind.NewKeyedTransactor(self.privateKey)
|
|
opts.Value = self.AutoDepositBuffer
|
|
opts.Context = ctx
|
|
|
|
glog.V(logger.Info).Infof("Deploying new chequebook (owner: %v)", opts.From.Hex())
|
|
contract, err := deployChequebookLoop(opts, backend)
|
|
if err != nil {
|
|
glog.V(logger.Error).Infof("unable to deploy new chequebook: %v", err)
|
|
return err
|
|
}
|
|
glog.V(logger.Info).Infof("new chequebook deployed at %v (owner: %v)", contract.Hex(), opts.From.Hex())
|
|
|
|
// need to save config at this point
|
|
self.lock.Lock()
|
|
self.Contract = contract
|
|
err = self.newChequebookFromContract(path, backend)
|
|
self.lock.Unlock()
|
|
if err != nil {
|
|
glog.V(logger.Warn).Infof("error initialising cheque book (owner: %v): %v", opts.From.Hex(), err)
|
|
}
|
|
return err
|
|
}
|
|
|
|
// repeatedly tries to deploy a chequebook.
|
|
func deployChequebookLoop(opts *bind.TransactOpts, backend chequebook.Backend) (addr common.Address, err error) {
|
|
var tx *types.Transaction
|
|
for try := 0; try < chequebookDeployRetries; try++ {
|
|
if try > 0 {
|
|
time.Sleep(chequebookDeployDelay)
|
|
}
|
|
if _, tx, _, err = contract.DeployChequebook(opts, backend); err != nil {
|
|
glog.V(logger.Warn).Infof("can't send chequebook deploy tx (try %d): %v", try, err)
|
|
continue
|
|
}
|
|
if addr, err = bind.WaitDeployed(opts.Context, backend, tx); err != nil {
|
|
glog.V(logger.Warn).Infof("chequebook deploy error (try %d): %v", try, err)
|
|
continue
|
|
}
|
|
return addr, nil
|
|
}
|
|
return addr, err
|
|
}
|
|
|
|
// initialise the chequebook from a persisted json file or create a new one
|
|
// caller holds the lock
|
|
func (self *SwapParams) newChequebookFromContract(path string, backend chequebook.Backend) error {
|
|
hexkey := common.Bytes2Hex(self.Contract.Bytes())
|
|
err := os.MkdirAll(filepath.Join(path, "chequebooks"), os.ModePerm)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to create directory for chequebooks: %v", err)
|
|
}
|
|
|
|
chbookpath := filepath.Join(path, "chequebooks", hexkey+".json")
|
|
self.chbook, err = chequebook.LoadChequebook(chbookpath, self.privateKey, backend, true)
|
|
|
|
if err != nil {
|
|
self.chbook, err = chequebook.NewChequebook(chbookpath, self.Contract, self.privateKey, backend)
|
|
if err != nil {
|
|
glog.V(logger.Warn).Infof("unable to initialise chequebook (owner: %v): %v", self.owner.Hex(), err)
|
|
return fmt.Errorf("unable to initialise chequebook (owner: %v): %v", self.owner.Hex(), err)
|
|
}
|
|
}
|
|
|
|
self.chbook.AutoDeposit(self.AutoDepositInterval, self.AutoDepositThreshold, self.AutoDepositBuffer)
|
|
glog.V(logger.Info).Infof("auto deposit ON for %v -> %v: interval = %v, threshold = %v, buffer = %v)", crypto.PubkeyToAddress(*(self.publicKey)).Hex()[:8], self.Contract.Hex()[:8], self.AutoDepositInterval, self.AutoDepositThreshold, self.AutoDepositBuffer)
|
|
|
|
return nil
|
|
}
|