/
autogenerate_bot.go
329 lines (296 loc) · 10.1 KB
/
autogenerate_bot.go
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package backend
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"strings"
"time"
"github.com/stellar/go/clients/horizonclient"
"github.com/stellar/go/keypair"
"github.com/stellar/go/network"
hProtocol "github.com/stellar/go/protocols/horizon"
"github.com/stellar/go/txnbuild"
"github.com/stellar/kelp/gui/model2"
"github.com/stellar/kelp/plugins"
"github.com/stellar/kelp/support/kelpos"
"github.com/stellar/kelp/support/networking"
"github.com/stellar/kelp/support/toml"
"github.com/stellar/kelp/trader"
)
const issuerSeed = "SANPCJHHXCPRN6IIZRBEQXS5M3L2LY7EYQLAVTYD56KL3V7ABO4I3ISZ"
var centralizedPricePrecisionOverride = int8(6)
var centralizedVolumePrecisionOverride = int8(1)
var centralizedMinBaseVolumeOverride = float64(30.0)
var centralizedMinQuoteVolumeOverride = float64(10.0)
type autogenerateBotRequest struct {
UserData UserData `json:"user_data"`
}
func (s *APIServer) autogenerateBot(w http.ResponseWriter, r *http.Request) {
bodyBytes, e := ioutil.ReadAll(r.Body)
if e != nil {
s.writeErrorJson(w, fmt.Sprintf("error reading request input: %s", e))
return
}
log.Printf("autogenerateBot requestJson: %s\n", string(bodyBytes))
var req autogenerateBotRequest
e = json.Unmarshal(bodyBytes, &req)
if e != nil {
s.writeErrorJson(w, fmt.Sprintf("error unmarshaling json: %s; bodyString = %s", e, string(bodyBytes)))
return
}
userID := req.UserData.ID
if strings.TrimSpace(userID) == "" {
s.writeErrorJson(w, fmt.Sprintf("cannot have empty userID"))
return
}
kp, e := keypair.Random()
if e != nil {
s.writeError(w, fmt.Sprintf("error generating keypair: %s\n", e))
return
}
// make and register bot, which places it in the initial bot state
bot := model2.MakeAutogeneratedBot()
e = s.kos.BotDataForUser(req.UserData.toUser()).RegisterBot(bot)
if e != nil {
// the bot is not registered at this stage so we don't throw a KelpError here
s.writeError(w, fmt.Sprintf("error registering bot: %s\n", e))
return
}
e = s.setupOpsDirectory(userID)
if e != nil {
// the bot is not registered at this stage so we don't throw a KelpError here
s.writeError(w, fmt.Sprintf("error setting up ops directory: %s\n", e))
return
}
filenamePair := bot.Filenames()
sampleTrader := s.makeSampleTrader(kp.Seed())
traderFilePath := s.botConfigsPathForUser(userID).Join(filenamePair.Trader)
log.Printf("writing autogenerated bot config to file: %s\n", traderFilePath.AsString())
e = toml.WriteFile(traderFilePath.Native(), sampleTrader)
if e != nil {
// the bot is not registered at this stage so we don't throw a KelpError here
s.writeError(w, fmt.Sprintf("error writing trader toml file: %s\n", e))
return
}
sampleBuysell := makeSampleBuysell()
strategyFilePath := s.botConfigsPathForUser(userID).Join(filenamePair.Strategy)
log.Printf("writing autogenerated strategy config to file: %s\n", strategyFilePath.AsString())
e = toml.WriteFile(strategyFilePath.Native(), sampleBuysell)
if e != nil {
s.writeKelpError(req.UserData, w, makeKelpErrorResponseWrapper(
errorTypeBot,
bot.Name,
time.Now().UTC(),
errorLevelWarning,
fmt.Sprintf("could not write strategy toml file: %s\n", e),
))
return
}
// we only want to start initializing bot once it has been created, so we only advance state if everything is completed
go func() {
e := s.setupTestnetAccount(kp.Address(), kp.Seed(), bot.Name)
if e != nil {
s.addKelpErrorToMap(req.UserData, makeKelpErrorResponseWrapper(
errorTypeBot,
bot.Name,
time.Now().UTC(),
errorLevelError,
fmt.Sprintf("error setting up account for bot '%s': %s\n", bot.Name, e),
).KelpError)
return
}
e = s.kos.BotDataForUser(req.UserData.toUser()).AdvanceBotState(bot.Name, kelpos.InitState())
if e != nil {
s.addKelpErrorToMap(req.UserData, makeKelpErrorResponseWrapper(
errorTypeBot,
bot.Name,
time.Now().UTC(),
errorLevelError,
fmt.Sprintf("error advancing bot state after setting up account for bot '%s': %s\n", bot.Name, e),
).KelpError)
return
}
}()
botJSON, e := json.Marshal(*bot)
if e != nil {
s.writeKelpError(req.UserData, w, makeKelpErrorResponseWrapper(
errorTypeBot,
bot.Name,
time.Now().UTC(),
errorLevelWarning,
fmt.Sprintf("unable to serialize bot: %s\n", e),
))
return
}
w.WriteHeader(http.StatusOK)
w.Write(botJSON)
}
func (s *APIServer) setupTestnetAccount(address string, signer string, botName string) error {
// this function runs in testnet mode only
client := s.apiTestNet
fundedAccount, e := s.checkFundAccount(client, address, botName)
if e != nil {
return fmt.Errorf("error checking and funding account: %s", e)
}
var txOps []txnbuild.Operation
trustOp := txnbuild.ChangeTrust{
Line: txnbuild.CreditAsset{
Code: "COUPON",
Issuer: "GBMMZMK2DC4FFP4CAI6KCVNCQ7WLO5A7DQU7EC7WGHRDQBZB763X4OQI",
},
}
txOps = append(txOps, &trustOp)
paymentOp := txnbuild.Payment{
Destination: address,
Amount: "1000.0",
Asset: txnbuild.CreditAsset{
Code: "COUPON",
Issuer: "GBMMZMK2DC4FFP4CAI6KCVNCQ7WLO5A7DQU7EC7WGHRDQBZB763X4OQI",
},
SourceAccount: &txnbuild.SimpleAccount{AccountID: "GBMMZMK2DC4FFP4CAI6KCVNCQ7WLO5A7DQU7EC7WGHRDQBZB763X4OQI"},
}
txOps = append(txOps, &paymentOp)
tx, e := txnbuild.NewTransaction(
txnbuild.TransactionParams{
SourceAccount: fundedAccount,
Operations: txOps,
Timebounds: txnbuild.NewInfiniteTimeout(),
BaseFee: 100,
// If IncrementSequenceNum is true, NewTransaction() will call `sourceAccount.IncrementSequenceNumber()`
// to obtain the sequence number for the transaction.
// If IncrementSequenceNum is false, NewTransaction() will call `sourceAccount.GetSequenceNumber()`
// to obtain the sequence number for the transaction.
// leaving as true since that's what it was in the old sdk so we want to maintain backward compatibility and we
// need to increment the seq number on the account somewhere to use the next seq num
IncrementSequenceNum: true,
},
)
if e != nil {
return fmt.Errorf("cannot make transaction to create trustline transaction for account %s for bot '%s': %s", address, botName, e)
}
for _, s := range []string{signer, issuerSeed} {
kp, e := keypair.Parse(s)
if e != nil {
return fmt.Errorf("cannot parse seed %s required for signing: %s", s, e)
}
tx, e = tx.Sign(network.TestNetworkPassphrase, kp.(*keypair.Full))
if e != nil {
return fmt.Errorf("cannot sign trustline transaction for account %s for bot '%s': %s", address, botName, e)
}
}
txn64, e := tx.Base64()
if e != nil {
return fmt.Errorf("cannot convert trustline transaction to base64 for account %s for bot '%s': %s", address, botName, e)
}
resp, e := client.SubmitTransactionXDR(txn64)
if e != nil {
return fmt.Errorf("error submitting change trust transaction for address %s for bot '%s': %s", address, botName, e)
}
log.Printf("successfully added trustline for address %s for bot '%s': %v\n", address, botName, resp)
return nil
}
func (s *APIServer) checkFundAccount(client *horizonclient.Client, address string, botName string) (*hProtocol.Account, error) {
account, e := client.AccountDetail(horizonclient.AccountRequest{AccountID: address})
if e == nil {
log.Printf("account already exists %s for bot '%s', no need to fund via friendbot\n", address, botName)
return &account, nil
} else if e != nil {
var herr *horizonclient.Error
switch t := e.(type) {
case *horizonclient.Error:
herr = t
case horizonclient.Error:
herr = &t
default:
return nil, fmt.Errorf("unexpected error when checking for existence of account %s for bot '%s': %s", address, botName, e)
}
if herr.Problem.Status != 404 {
return nil, fmt.Errorf("unexpected horizon error code when checking for existence of account %s for bot '%s': %d (%v)", address, botName, herr.Problem.Status, *herr)
}
}
if !strings.Contains(client.HorizonURL, "test") {
log.Printf("not attempting to create mainnet account %s for bot '%s' since mainnet account does not exist\n", address, botName)
}
// since it's a 404 we want to continue funding below
var fundResponse interface{}
e = networking.JSONRequest(http.DefaultClient, "GET", "https://friendbot.stellar.org/?addr="+address, "", nil, &fundResponse, "")
if e != nil {
return nil, fmt.Errorf("error funding address %s for bot '%s': %s", address, botName, e)
}
log.Printf("successfully funded account %s for bot '%s': %s\n", address, botName, fundResponse)
// refetch account to confirm
account, e = client.AccountDetail(horizonclient.AccountRequest{AccountID: address})
if e != nil {
var herr *horizonclient.Error
switch t := e.(type) {
case *horizonclient.Error:
herr = t
case horizonclient.Error:
herr = &t
default:
return nil, fmt.Errorf("unexpected error when checking for existence of account %s for bot '%s': %s", address, botName, e)
}
return nil, fmt.Errorf("horizon error when checking for existence of account %s for bot '%s': %d (%v) -- could this be caused because horizon has not ingested this data yet? (programmer: maybe create hProtocol.Account instance manually instead of fetching)", address, botName, herr.Problem.Status, *herr)
}
return &account, nil
}
func (s *APIServer) makeSampleTrader(seed string) *trader.BotConfig {
return trader.MakeBotConfig(
"",
seed,
"XLM",
"",
"COUPON",
"GBMMZMK2DC4FFP4CAI6KCVNCQ7WLO5A7DQU7EC7WGHRDQBZB763X4OQI",
60,
15000,
5,
"both",
0,
0,
s.horizonTestnetURI,
nil,
"",
"",
&trader.FeeConfig{
CapacityTrigger: 0.8,
Percentile: 90,
MaxOpFeeStroops: 5000,
},
¢ralizedPricePrecisionOverride,
¢ralizedVolumePrecisionOverride,
¢ralizedMinBaseVolumeOverride,
¢ralizedMinQuoteVolumeOverride,
)
}
func makeSampleBuysell() *plugins.BuySellConfig {
return plugins.MakeBuysellConfig(
0.001,
0.001,
0.0,
0.0,
true,
10.0,
"exchange",
"kraken/XXLM/ZUSD",
"fixed",
"1.0",
[]plugins.StaticLevel{
plugins.StaticLevel{
SPREAD: 0.0010,
AMOUNT: 100.0,
}, plugins.StaticLevel{
SPREAD: 0.0015,
AMOUNT: 100.0,
}, plugins.StaticLevel{
SPREAD: 0.0020,
AMOUNT: 100.0,
}, plugins.StaticLevel{
SPREAD: 0.0025,
AMOUNT: 100.0,
},
},
)
}