eth: v1 contract (#2038)

* eth v1 contract

For v1, the locator encodes all of the immutable data that defines the
swap. This immutable data is now collected in something called
a "vector" (dexeth.SwapVector). For version 0, some vector data
is stored on-chain indexed by the secret hash. For version 1, all
vector data is encoded in the locator.

I've also made an effort to standardize the use of status/step,
and eliminated the use of ambiguous "ver" variables throughout.
A "status" is now the collection of mutable contract data: the step,
the init block height, and the secret. The status and vector
collectively fully characterize the swap.

client/asset/eth:
New contractV1 and tokenContractorV1 interfaces. To avoid duplication,
the ERC20 parts of the tokenContractors are separated into a new type
erc20Contractor that is embedded by both versions. Getters for
status and vector are added in place of the old method "swap".

.gitignore

@@ -52,3 +52,5 @@ client/tor/build
 server/cmd/geogame/geogame
 internal/cmd/xmrswap/xmrswap
 internal/cmd/xmrswap/config.json
+internal/libsecp256k1/secp256k1
+server/cmd/dcrdex/evm-protocol-overrides.json

client/asset/btc/btc_test.go

@@ -2197,7 +2197,7 @@ func testAvailableFund(t *testing.T, segwit bool, walletType string) {
 	}
 
 	ord := &asset.Order{
-		Version:       version,
+		AssetVersion:  version,
 		Value:         0,
 		MaxSwapCount:  1,
 		MaxFeeRate:    tBTC.MaxFeeRate,
@@ -2762,7 +2762,7 @@ func TestFundEdges(t *testing.T) {
 	unspents := []*ListUnspentResult{p2pkhUnspent}
 	node.listUnspent = unspents
 	ord := &asset.Order{
-		Version:       version,
+		AssetVersion:  version,
 		Value:         swapVal,
 		MaxSwapCount:  lots,
 		MaxFeeRate:    tBTC.MaxFeeRate,
@@ -2986,7 +2986,7 @@ func TestFundEdgesSegwit(t *testing.T) {
 	unspents := []*ListUnspentResult{p2wpkhUnspent}
 	node.listUnspent = unspents
 	ord := &asset.Order{
-		Version:       version,
+		AssetVersion:  version,
 		Value:         swapVal,
 		MaxSwapCount:  lots,
 		MaxFeeRate:    tBTC.MaxFeeRate,
@@ -4365,7 +4365,7 @@ func testPreSwap(t *testing.T, segwit bool, walletType string) {
 	}
 
 	form := &asset.PreSwapForm{
-		Version:       version,
+		AssetVersion:  version,
 		LotSize:       tLotSize,
 		Lots:          lots,
 		MaxFeeRate:    tBTC.MaxFeeRate,
@@ -4411,8 +4411,8 @@ func testPreRedeem(t *testing.T, segwit bool, walletType string) {
 	defer shutdown()
 
 	preRedeem, err := wallet.PreRedeem(&asset.PreRedeemForm{
-		Version: version,
-		Lots:    5,
+		AssetVersion: version,
+		Lots:         5,
 	})
 	// Shouldn't actually be any path to error.
 	if err != nil {

client/asset/btc/livetest/livetest.go

@@ -266,7 +266,7 @@ func Run(t *testing.T, cfg *Config) {
 	checkAmt("second", rig.secondWallet)
 
 	ord := &asset.Order{
-		Version:      0,
+		AssetVersion: 0,
 		Value:        contractValue * 3,
 		MaxSwapCount: lots * 3,
 		MaxFeeRate:   cfg.Asset.MaxFeeRate,

client/asset/btc/simnet_test.go

@@ -367,7 +367,7 @@ func testWalletTxBalanceSync(t *testing.T, fromWallet, toWallet *ExchangeWalletF
 	}
 
 	order := &asset.Order{
-		Value:         toSatoshi(1),
+		AssetVersion:  toSatoshi(1),
 		FeeSuggestion: 10,
 		MaxSwapCount:  1,
 		MaxFeeRate:    20,

client/asset/dcr/dcr_test.go

@@ -876,7 +876,7 @@ func TestAvailableFund(t *testing.T) {
 	}
 
 	ord := &asset.Order{
-		Version:       version,
+		AssetVersion:  version,
 		Value:         0,
 		MaxSwapCount:  1,
 		MaxFeeRate:    tDCR.MaxFeeRate,
@@ -2595,7 +2595,7 @@ func TestFundEdges(t *testing.T) {
 
 	node.unspent = []walletjson.ListUnspentResult{p2pkhUnspent}
 	ord := &asset.Order{
-		Version:       version,
+		AssetVersion:  version,
 		Value:         swapVal,
 		MaxSwapCount:  lots,
 		MaxFeeRate:    tDCR.MaxFeeRate,
@@ -3871,7 +3871,7 @@ func TestPreSwap(t *testing.T) {
 	node.unspent = []walletjson.ListUnspentResult{p2pkhUnspent}
 
 	form := &asset.PreSwapForm{
-		Version:       version,
+		AssetVersion:  version,
 		LotSize:       tLotSize,
 		Lots:          lots,
 		MaxFeeRate:    tDCR.MaxFeeRate,
@@ -3913,8 +3913,8 @@ func TestPreRedeem(t *testing.T) {
 	defer shutdown()
 
 	preRedeem, err := wallet.PreRedeem(&asset.PreRedeemForm{
-		Version: version,
-		Lots:    5,
+		AssetVersion: version,
+		Lots:         5,
 	})
 	// Shouldn't actually be any path to error.
 	if err != nil {

client/asset/dcr/simnet_test.go

@@ -348,7 +348,7 @@ func runTest(t *testing.T, splitTx bool) {
 	}
 
 	ord := &asset.Order{
-		Version:      tDCR.Version,
+		AssetVersion: tDCR.Version,
 		Value:        contractValue * 3,
 		MaxSwapCount: lots * 3,
 		MaxFeeRate:   tDCR.MaxFeeRate,

client/asset/driver.go

@@ -16,7 +16,8 @@ import (
 // networks enables filtering out tokens via the package's SetNetwork.
 type nettedToken struct {
 	*Token
-	addrs map[dex.Network]string
+	erc20NetAddrs             map[dex.Network]string
+	netSupportedAssetVersions map[dex.Network][]uint32
 }
 
 var (
@@ -85,7 +86,13 @@ func Register(assetID uint32, driver Driver) {
 // RegisterToken should be called to register tokens. If no nets are specified
 // the token will be registered for all networks. The user must invoke
 // SetNetwork to enable net-based filtering of package function output.
-func RegisterToken(tokenID uint32, token *dex.Token, walletDef *WalletDefinition, addrs map[dex.Network]string) {
+func RegisterToken(
+	tokenID uint32,
+	token *dex.Token,
+	walletDef *WalletDefinition,
+	erc20NetAddrs map[dex.Network]string,
+	netSupportedAssetVersions map[dex.Network][]uint32,
+) {
 	driversMtx.Lock()
 	defer driversMtx.Unlock()
 	if _, exists := tokens[tokenID]; exists {
@@ -101,7 +108,8 @@ func RegisterToken(tokenID uint32, token *dex.Token, walletDef *WalletDefinition
 			Definition: walletDef,
 			// ContractAddress specified in SetNetwork.
 		},
-		addrs: addrs,
+		erc20NetAddrs:             erc20NetAddrs,
+		netSupportedAssetVersions: netSupportedAssetVersions,
 	}
 }
 
@@ -262,12 +270,13 @@ func UnitInfo(assetID uint32) (dex.UnitInfo, error) {
 // network. SetNetwork need only be called once during initialization.
 func SetNetwork(net dex.Network) {
 	for assetID, nt := range tokens {
-		addr, exists := nt.addrs[net]
+		addr, exists := nt.erc20NetAddrs[net]
 		if !exists {
 			delete(tokens, assetID)
 			continue
 		}
 		nt.Token.ContractAddress = addr
+		nt.Token.SupportedAssetVersions = nt.netSupportedAssetVersions[net]
 	}
 }
 

client/asset/estimation.go

@@ -38,8 +38,9 @@ type RedeemEstimate struct {
 
 // PreSwapForm can be used to get a swap fees estimate.
 type PreSwapForm struct {
-	// Version is the asset version. Most backends only support one version.
-	Version uint32
+	// AssetVersion is the server's asset version. Most backends only support
+	// one version.
+	AssetVersion uint32
 	// LotSize is the lot size for the calculation. For quote assets, LotSize
 	// should be based on either the user's limit order rate, or some measure
 	// of the current market rate.
@@ -83,8 +84,9 @@ type PreSwap struct {
 
 // PreRedeemForm can be used to get a redemption estimate.
 type PreRedeemForm struct {
-	// Version is the asset version. Most backends only support one version.
-	Version uint32
+	// AssetVersion is the asset version. Most backends only support one
+	// version.
+	AssetVersion uint32
 	// Lots is the number of lots in the order.
 	Lots uint64
 	// FeeSuggestion is a suggested fee from the server.

client/asset/eth/cmd/getgas/main.go

@@ -48,8 +48,8 @@ func mainErr() error {
 	flag.BoolVar(&useMainnet, "mainnet", false, "use mainnet")
 	flag.BoolVar(&useTestnet, "testnet", false, "use testnet")
 	flag.BoolVar(&useSimnet, "simnet", false, "use simnet")
-	flag.BoolVar(&trace, "trace", false, "use simnet")
-	flag.BoolVar(&debug, "debug", false, "use simnet")
+	flag.BoolVar(&trace, "trace", false, "use trace logging")
+	flag.BoolVar(&debug, "debug", false, "use debug logging")
 	flag.IntVar(&maxSwaps, "n", 5, "max number of swaps per transaction. minimum is 2. test will run from 2 swap up to n swaps.")
 	flag.StringVar(&chain, "chain", "eth", "symbol of the base chain")
 	flag.StringVar(&token, "token", "", "symbol of the token. if token is not specified, will check gas for base chain")
@@ -125,7 +125,8 @@ func mainErr() error {
 
 		wParams := new(eth.GetGasWalletParams)
 		wParams.BaseUnitInfo = bui
-		if token != chain {
+		isToken := token != chain
+		if isToken {
 			var exists bool
 			tkn, exists := tokens[assetID]
 			if !exists {
@@ -139,16 +140,18 @@ func mainErr() error {
 			}
 			swapContract, exists := netToken.SwapContracts[contractVer]
 			if !exists {
-				return nil, fmt.Errorf("no verion %d contract for %s token on %s network %s", contractVer, tkn.Name, chain, net)
+				return nil, fmt.Errorf("no version %d contract for %s token on %s network %s", contractVer, tkn.Name, chain, net)
 			}
 			wParams.Gas = &swapContract.Gas
 		} else {
 			wParams.UnitInfo = bui
 			g, exists := gases[contractVer]
 			if !exists {
-				return nil, fmt.Errorf("no verion %d contract for %s network %s", contractVer, chain, net)
+				return nil, fmt.Errorf("no version %d contract for %s network %s", contractVer, chain, net)
 			}
 			wParams.Gas = g
+		}
+		if !isToken || contractVer == 1 {
 			cs, exists := contracts[contractVer]
 			if !exists {
 				return nil, fmt.Errorf("no version %d base chain swap contract on %s", contractVer, chain)