swap, contracts, vendor: move to ERC20

api/config.go

@@ -57,7 +57,8 @@ type Config struct {
 	SwapEnabled             bool           // whether SWAP incentives are enabled
 	SwapPaymentThreshold    uint64         // honey amount at which a payment is triggered
 	SwapDisconnectThreshold uint64         // honey amount at which a peer disconnects
-	SwapInitialDeposit      uint64         // initial deposit amount to the chequebook
+	SwapNoDeposit           bool           // do not ask the user to deposit during boot sequence
+	SwapDepositAmount       uint64         // deposit amount to the chequebook
 	SwapLogPath             string         // dir to swap related audit logs
 	Contract                common.Address // address of the chequebook contract
 	SwapChequebookFactory   common.Address // address of the chequebook factory contract
@@ -96,7 +97,8 @@ func NewConfig() *Config {
 		FileStoreParams:         storage.NewFileStoreParams(),
 		SwapBackendURL:          "",
 		SwapEnabled:             false,
-		SwapInitialDeposit:      swap.DefaultInitialDepositAmount,
+		SwapNoDeposit:           false,
+		SwapDepositAmount:       swap.DefaultDepositAmount,
 		SwapPaymentThreshold:    swap.DefaultPaymentThreshold,
 		SwapDisconnectThreshold: swap.DefaultDisconnectThreshold,
 		SwapLogPath:             "",

cmd/swarm/config.go

@@ -66,7 +66,8 @@ const (
 	SwarmEnvNetworkID               = "SWARM_NETWORK_ID"
 	SwarmEnvChequebookAddr          = "SWARM_CHEQUEBOOK_ADDR"
 	SwarmEnvChequebookFactoryAddr   = "SWARM_SWAP_CHEQUEBOOK_FACTORY_ADDR"
-	SwarmEnvInitialDeposit          = "SWARM_INITIAL_DEPOSIT"
+	SwarmEnvSwapNoDeposit           = "SWARM_SWAP_NO_DEPOSIT"
+	SwarmEnvSwapDepositAmount       = "SWARM_SWAP_DEPOSIT_AMOUNT"
 	SwarmEnvSwapEnable              = "SWARM_SWAP_ENABLE"
 	SwarmEnvSwapBackendURL          = "SWARM_SWAP_BACKEND_URL"
 	SwarmEnvSwapPaymentThreshold    = "SWARM_SWAP_PAYMENT_THRESHOLD"
@@ -212,8 +213,12 @@ func flagsOverride(currentConfig *bzzapi.Config, ctx *cli.Context) *bzzapi.Confi
 	if swapLogPath := ctx.GlobalString(SwarmSwapLogPathFlag.Name); currentConfig.SwapEnabled && swapLogPath != "" {
 		currentConfig.SwapLogPath = swapLogPath
 	}
-	if initialDepo := ctx.GlobalUint64(SwarmSwapInitialDepositFlag.Name); initialDepo != 0 {
-		currentConfig.SwapInitialDeposit = initialDepo
+
+	if noDeposit := ctx.GlobalBool(SwarmSwapNoDepositFlag.Name); noDeposit {
+		currentConfig.SwapNoDeposit = true
+	}
+	if initialDepo := ctx.GlobalUint64(SwarmSwapDepositAmountFlag.Name); initialDepo != 0 {
+		currentConfig.SwapDepositAmount = initialDepo
 	}
 	if paymentThreshold := ctx.GlobalUint64(SwarmSwapPaymentThresholdFlag.Name); paymentThreshold != 0 {
 		currentConfig.SwapPaymentThreshold = paymentThreshold

cmd/swarm/flags.go

@@ -54,10 +54,15 @@ var (
 		Value:  network.DefaultNetworkID,
 		EnvVar: SwarmEnvNetworkID,
 	}
-	SwarmSwapInitialDepositFlag = cli.StringFlag{
-		Name:   "swap-initial-deposit",
-		Usage:  "Initial deposit amount for swap chequebook",
-		EnvVar: SwarmEnvInitialDeposit,
+	SwarmSwapDepositAmountFlag = cli.StringFlag{
+		Name:   "swap-deposit-amount",
+		Usage:  "Deposit amount for swap chequebook",
+		EnvVar: SwarmEnvSwapDepositAmount,
+	}
+	SwarmSwapNoDepositFlag = cli.BoolFlag{
+		Name:   "swap-no-deposit",
+		Usage:  "Don't deposit during boot sequence",
+		EnvVar: SwarmEnvSwapNoDeposit,
 	}
 	SwarmSwapChequebookAddrFlag = cli.StringFlag{
 		Name:   "swap-chequebook",

cmd/swarm/main.go

@@ -185,7 +185,8 @@ func init() {
 		SwarmSwapLogPathFlag,
 		SwarmSwapChequebookAddrFlag,
 		SwarmSwapChequebookFactoryFlag,
-		SwarmSwapInitialDepositFlag,
+		SwarmSwapNoDepositFlag,
+		SwarmSwapDepositAmountFlag,
 		// end of swap flags
 		SwarmNoSyncFlag,
 		SwarmSyncUpdateDelay,

contracts/swap/factory.go

@@ -9,7 +9,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
-	chequebookFactory "github.com/ethersphere/go-sw3/contracts-v0-1-1/simpleswapfactory"
+	chequebookFactory "github.com/ethersphere/go-sw3/contracts-v0-2-0/simpleswapfactory"
 )
 
 var (
@@ -19,6 +19,7 @@ var (
 	// Deployments maps from network ids to deployed contract factories
 	Deployments = map[uint64]common.Address{
 		// Ropsten
+		//TODO: update to point to an address with the new go-bindings
 		3: common.HexToAddress("0x2e9C43E186eaF4fee10799d67e75f8CFc5BA3a0c"),
 	}
 )
@@ -64,21 +65,20 @@ func (sf simpleSwapFactory) VerifySelf() error {
 	if err != nil {
 		return err
 	}
-
 	referenceCode := common.FromHex(chequebookFactory.SimpleSwapFactoryDeployedCode)
 	if !bytes.Equal(code, referenceCode) {
 		return errors.New("not a valid factory contract")
 	}
-
 	return nil
 }
 
 // DeploySimpleSwap deploys a new SimpleSwap contract from the factory and returns the ready to use Contract abstraction
 func (sf simpleSwapFactory) DeploySimpleSwap(auth *bind.TransactOpts, issuer common.Address, defaultHardDepositTimeoutDuration *big.Int) (Contract, error) {
 	// for some reason the automatic gas estimation is too low
-	// this value was determind by deploying through truffle and rounding up to the next 100000
+	// this value was determined by experimentation and is higher than what works in truffle
+	// this might be due to the simulated backend running on a different evm version
 	// the deployment cost should always be constant
-	auth.GasLimit = 1700000
+	auth.GasLimit = 2000000
 	tx, err := sf.instance.DeploySimpleSwap(auth, issuer, defaultHardDepositTimeoutDuration)
 	if err != nil {
 		return nil, err

contracts/swap/swap.go

@@ -24,12 +24,11 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
-	"time"
 
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
-	contract "github.com/ethersphere/go-sw3/contracts-v0-1-1/simpleswap"
+	contract "github.com/ethersphere/go-sw3/contracts-v0-2-0/erc20simpleswap"
 )
 
 var (
@@ -45,14 +44,18 @@ type Backend interface {
 
 // Contract interface defines the methods exported from the underlying go-bindings for the smart contract
 type Contract interface {
-	// Withdraw attempts to withdraw Wei from the chequebook
-	Withdraw(auth *bind.TransactOpts, backend Backend, amount *big.Int) (*types.Receipt, error)
+	// Withdraw attempts to withdraw ERC20-token from the chequebook
+	Withdraw(auth *bind.TransactOpts, amount *big.Int) (*types.Receipt, error)
 	// Deposit sends a raw transaction to the chequebook, triggering the fallback—depositing amount
-	Deposit(auth *bind.TransactOpts, backend Backend, amout *big.Int) (*types.Receipt, error)
+	Deposit(auth *bind.TransactOpts, amout *big.Int) (*types.Receipt, error)
 	// CashChequeBeneficiary cashes the cheque by the beneficiary
 	CashChequeBeneficiary(auth *bind.TransactOpts, beneficiary common.Address, cumulativePayout *big.Int, ownerSig []byte) (*CashChequeResult, *types.Receipt, error)
-	// LiquidBalance returns the LiquidBalance (total balance in Wei - total hard deposits in Wei) of the chequebook
+	// LiquidBalance returns the LiquidBalance (total balance in ERC20-token - total hard deposits in ERC20-token) of the chequebook
 	LiquidBalance(auth *bind.CallOpts) (*big.Int, error)
+	//Token returns the address of the ERC20 contract, used by the chequebook
+	Token(auth *bind.CallOpts) (common.Address, error)
+	//BalanceAtTokenContract returns the balance of the account for the underlying ERC20 contract of the chequebook
+	BalanceAtTokenContract(opts *bind.CallOpts, account common.Address) (*big.Int, error)
 	// ContractParams returns contract info (e.g. deployed address)
 	ContractParams() *Params
 	// Issuer returns the contract owner from the blockchain
@@ -80,23 +83,16 @@ type Params struct {
 }
 
 type simpleContract struct {
-	instance *contract.SimpleSwap
+	instance *contract.ERC20SimpleSwap
 	address  common.Address
 	backend  Backend
 }
 
-// Deploy deploys an instance of the underlying contract and returns its instance and the transaction identifier
-func Deploy(auth *bind.TransactOpts, backend Backend, owner common.Address, harddepositTimeout time.Duration) (Contract, *types.Transaction, error) {
-	addr, tx, instance, err := contract.DeploySimpleSwap(auth, backend, owner, big.NewInt(int64(harddepositTimeout)))
-	c := simpleContract{instance: instance, address: addr, backend: backend}
-	return c, tx, err
-}
-
 // InstanceAt creates a new instance of a contract at a specific address.
 // It assumes that there is an existing contract instance at the given address, or an error is returned
 // This function is needed to communicate with remote Swap contracts (e.g. sending a cheque)
 func InstanceAt(address common.Address, backend Backend) (Contract, error) {
-	instance, err := contract.NewSimpleSwap(address, backend)
+	instance, err := contract.NewERC20SimpleSwap(address, backend)
 	if err != nil {
 		return nil, err
 	}
@@ -105,29 +101,42 @@ func InstanceAt(address common.Address, backend Backend) (Contract, error) {
 }
 
 // Withdraw withdraws amount from the chequebook and blocks until the transaction is mined
-func (s simpleContract) Withdraw(auth *bind.TransactOpts, backend Backend, amount *big.Int) (*types.Receipt, error) {
+func (s simpleContract) Withdraw(auth *bind.TransactOpts, amount *big.Int) (*types.Receipt, error) {
 	tx, err := s.instance.Withdraw(auth, amount)
 	if err != nil {
 		return nil, err
 	}
-	return WaitFunc(auth, backend, tx)
+	return WaitFunc(auth, s.backend, tx)
 }
 
-// Deposit sends a transaction to the chequebook, which deposits the amount set in Auth.Value and blocks until the transaction is mined
-func (s simpleContract) Deposit(auth *bind.TransactOpts, backend Backend, amount *big.Int) (*types.Receipt, error) {
-	rawSimpleSwap := contract.SimpleSwapRaw{Contract: s.instance}
-	if auth.Value != big.NewInt(0) {
-		return nil, fmt.Errorf("Deposit value can only be set via amount parameter")
-	}
-	if amount == big.NewInt(0) {
+// Deposit sends an amount in ERC20 token to the chequebook and blocks until the transaction is mined
+func (s simpleContract) Deposit(auth *bind.TransactOpts, amount *big.Int) (*types.Receipt, error) {
+	if amount.Cmp(big.NewInt(0)) == 0 {
 		return nil, fmt.Errorf("Deposit amount cannot be equal to zero")
 	}
-	auth.Value = amount
-	tx, err := rawSimpleSwap.Transfer(auth)
+	// get ERC20Instance at the address of token which is registered in the chequebook
+	tokenAddress, err := s.Token(nil)
+	if err != nil {
+		return nil, err
+	}
+	token, err := contract.NewERC20(tokenAddress, s.backend)
+	if err != nil {
+		return nil, err
+	}
+	// check if we have sufficient balance
+	balance, err := s.BalanceAtTokenContract(nil, auth.From)
+	if err != nil {
+		return nil, err
+	}
+	if balance.Cmp(amount) == -1 {
+		return nil, fmt.Errorf("Not enough ERC20 balance at %x for account %x", tokenAddress, auth.From)
+	}
+	// transfer ERC20 to the chequebook
+	tx, err := token.Transfer(auth, s.address, amount)
 	if err != nil {
 		return nil, err
 	}
-	return WaitFunc(auth, backend, tx)
+	return WaitFunc(auth, s.backend, tx)
 }
 
 // CashChequeBeneficiary cashes the cheque on the blockchain and blocks until the transaction is mined.
@@ -164,16 +173,39 @@ func (s simpleContract) CashChequeBeneficiary(opts *bind.TransactOpts, beneficia
 	return result, receipt, nil
 }
 
-// LiquidBalance returns the LiquidBalance (total balance in Wei - total hard deposits in Wei) of the chequebook
+// LiquidBalance returns the LiquidBalance (total balance in ERC20-token - total hard deposits in ERC20-token) of the chequebook
 func (s simpleContract) LiquidBalance(opts *bind.CallOpts) (*big.Int, error) {
 	return s.instance.LiquidBalance(opts)
 }
 
+//Token returns the address of the ERC20 contract, used by the chequebook
+func (s simpleContract) Token(opts *bind.CallOpts) (common.Address, error) {
+	return s.instance.Token(opts)
+}
+
+//BalanceAtTokenContract returns the balance of the account for the underlying ERC20 contract of the chequebook
+func (s simpleContract) BalanceAtTokenContract(opts *bind.CallOpts, account common.Address) (*big.Int, error) {
+	// get ERC20Instance at the address of token which is registered in the chequebook
+	tokenAddress, err := s.Token(opts)
+	if err != nil {
+		return nil, err
+	}
+	token, err := contract.NewERC20(tokenAddress, s.backend)
+	if err != nil {
+		return nil, err
+	}
+	balance, err := token.BalanceOf(opts, account)
+	if err != nil {
+		return nil, err
+	}
+	return balance, nil
+}
+
 // ContractParams returns contract information
 func (s simpleContract) ContractParams() *Params {
 	return &Params{
-		ContractCode:    contract.SimpleSwapBin,
-		ContractAbi:     contract.SimpleSwapABI,
+		ContractCode:    contract.ERC20SimpleSwapBin,
+		ContractAbi:     contract.ERC20SimpleSwapABI,
 		ContractAddress: s.address,
 	}
 }

go.mod

@@ -27,7 +27,7 @@ require (
 	github.com/edsrzf/mmap-go v0.0.0-20160512033002-935e0e8a636c // indirect
 	github.com/elastic/gosigar v0.0.0-20180330100440-37f05ff46ffa // indirect
 	github.com/ethereum/go-ethereum v1.9.2
-	github.com/ethersphere/go-sw3 v0.1.1
+	github.com/ethersphere/go-sw3 v0.2.1
 	github.com/fatih/color v1.7.0 // indirect
 	github.com/fjl/memsize v0.0.0-20180418122429-ca190fb6ffbc
 	github.com/gballet/go-libpcsclite v0.0.0-20190528105824-2fd9b619dd3c // indirect

go.sum

@@ -64,8 +64,8 @@ github.com/elastic/gosigar v0.0.0-20180330100440-37f05ff46ffa/go.mod h1:cdorVVzy
 github.com/elazarl/goproxy v0.0.0-20170405201442-c4fc26588b6e/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
 github.com/ethereum/go-ethereum v1.9.2 h1:RMIHDO/diqXEgORSVzYx8xW9x2+S32PoAX5lQwya0Lw=
 github.com/ethereum/go-ethereum v1.9.2/go.mod h1:PwpWDrCLZrV+tfrhqqF6kPknbISMHaJv9Ln3kPCZLwY=
-github.com/ethersphere/go-sw3 v0.1.1 h1:czLnLSU0/XJLJt/GyPiEAds9YYnIgZZzfy+OQyiYQtk=
-github.com/ethersphere/go-sw3 v0.1.1/go.mod h1:HukT0aZ6QdW/d7zuD/0g5xlw6ewu9QeqHojxLDsaERQ=
+github.com/ethersphere/go-sw3 v0.2.1 h1:+i660uWzhRbT1YO7MAeuxzn+jUeYOTc8rGRVjsKaw+4=
+github.com/ethersphere/go-sw3 v0.2.1/go.mod h1:HukT0aZ6QdW/d7zuD/0g5xlw6ewu9QeqHojxLDsaERQ=
 github.com/evanphx/json-patch v4.2.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=

swap/config.go

@@ -27,12 +27,9 @@ const (
 	// DefaultPaymentThreshold is set to be equivalent to requesting and serving 10mb of data (2441 chunks (4096 bytes) = 10 mb, 10^7 bytes = 10 mb)
 	DefaultPaymentThreshold    = 2441*RetrieveRequestPrice + (10^7)*ChunkDeliveryPrice // 4096 * 2441 = 10 mb,
 	DefaultDisconnectThreshold = 20 * DefaultPaymentThreshold
-	// DefaultInitialDepositAmount is the default amount to send to the contract when initially deploying
+	// DefaultDepositAmount is the default amount to send to the contract when initially deploying
 	// NOTE: deliberate value for now; needs experimentation
-	DefaultInitialDepositAmount = 0
-	deployRetries               = 5
-	// delay between retries
-	deployDelay = 1 * time.Second
+	DefaultDepositAmount = 0
 	// This is the amount of time in seconds which an issuer has to wait to decrease the harddeposit of a beneficiary.
 	// The smart-contract allows for setting this variable differently per beneficiary
 	defaultHarddepositTimeoutDuration = 24 * time.Hour

swap/prices.go

@@ -32,6 +32,7 @@ but it could potentially be any currency the oracle and Swarm support,
 allowing for a multi-currency design.
 */
 
+//TODO: this calculations make little sense now, after update to ERC20-enabled chequebook
 // Placeholder prices
 // Based on a very crude calculation: average monthly cost for bandwidth in the US / average monthly usage of bandwidth in the US
 // $67 / 190GB = $0.35 / GB

swap/simulations_test.go

@@ -42,7 +42,7 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/simulations"
 	"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
 	"github.com/ethereum/go-ethereum/rpc"
-	contractFactory "github.com/ethersphere/go-sw3/contracts-v0-1-1/simpleswapfactory"
+	contractFactory "github.com/ethersphere/go-sw3/contracts-v0-2-0/simpleswapfactory"
 	cswap "github.com/ethersphere/swarm/contracts/swap"
 	"github.com/ethersphere/swarm/network/simulation"
 	"github.com/ethersphere/swarm/p2p/protocols"
@@ -215,7 +215,21 @@ func newSharedBackendSwaps(t *testing.T, nodeCount int) (*swapSimulationParams,
 	defaultBackend := backends.NewSimulatedBackend(alloc, gasLimit)
 	defaultBackend.Commit()
 
-	factoryAddress, _, _, err := contractFactory.DeploySimpleSwapFactory(bind.NewKeyedTransactor(keys[0]), defaultBackend)
+	tokenAddress, _, token, err := contractFactory.DeployERC20Mintable(bind.NewKeyedTransactor(keys[0]), defaultBackend)
+	if err != nil {
+		return nil, err
+	}
+	defaultBackend.Commit()
+
+	for i := 0; i < nodeCount; i++ {
+		_, err = token.Mint(bind.NewKeyedTransactor(keys[0]), addrs[i], big.NewInt(10000*int64(RetrieveRequestPrice)))
+		if err != nil {
+			return nil, err
+		}
+		defaultBackend.Commit()
+	}
+
+	factoryAddress, _, _, err := contractFactory.DeploySimpleSwapFactory(bind.NewKeyedTransactor(keys[0]), defaultBackend, tokenAddress)
 	if err != nil {
 		t.Fatalf("Error while deploying factory: %v", err)
 	}