How to use NewCtx method of main Package

Best Syzkaller code snippet using main.NewCtx

ante.go

Source:ante.go

1package auth2import (3	"bytes"4	"encoding/hex"5	"fmt"6	"math/big"7	sdk "github.com/cosmos/cosmos-sdk/types"8	"github.com/tendermint/tendermint/crypto"9	"github.com/tendermint/tendermint/crypto/secp256k1"10	authTypes "github.com/maticnetwork/heimdall/auth/types"11	"github.com/maticnetwork/heimdall/chainmanager"12	"github.com/maticnetwork/heimdall/helper"13	"github.com/maticnetwork/heimdall/types"14)15var (16	// simulation signature values used to estimate gas consumption17	simSecp256k1Pubkey secp256k1.PubKeySecp256k118	simSecp256k1Sig    [64]byte19	// fee wanted for checkpoint transaction20	gasWantedPerCheckpoinTx sdk.Gas = 1000000021	gasUsedPerCheckpointTx  sdk.Gas = gasWantedPerCheckpoinTx - 100000022	// DefaultFeeInMatic represents default fee in matic23	DefaultFeeInMatic = big.NewInt(10).Exp(big.NewInt(10), big.NewInt(15), nil)24	// DefaultFeeWantedPerTx fee wanted per tx25	DefaultFeeWantedPerTx = sdk.Coins{sdk.Coin{Denom: authTypes.FeeToken, Amount: sdk.NewIntFromBigInt(DefaultFeeInMatic)}}26)27func init() {28	// This decodes a valid hex string into a sepc256k1Pubkey for use in transaction simulation29	bz, _ := hex.DecodeString("035AD6810A47F073553FF30D2FCC7E0D3B1C0B74B61A1AAA2582344037151E143A")30	copy(simSecp256k1Pubkey[:], bz)31}32// SignatureVerificationGasConsumer is the type of function that is used to both consume gas when verifying signatures33// and also to accept or reject different types of PubKey's. This is where apps can define their own PubKey34type SignatureVerificationGasConsumer = func(meter sdk.GasMeter, sig authTypes.StdSignature, params authTypes.Params) sdk.Result35//36// Collect fees interface37//38// FeeCollector interface for fees collector39type FeeCollector interface {40	GetModuleAddress(string) types.HeimdallAddress41	SendCoinsFromAccountToModule(42		sdk.Context,43		types.HeimdallAddress,44		string,45		sdk.Coins,46	) sdk.Error47}48//49// MainTxMsg tx hash50//51type MainTxMsg interface {52	GetTxHash() types.HeimdallHash53	GetLogIndex() uint6454}55// NewAnteHandler returns an AnteHandler that checks and increments sequence56// numbers, checks signatures & account numbers, and deducts fees from the first57// signer.58func NewAnteHandler(59	ak AccountKeeper,60	chainKeeper chainmanager.Keeper,61	feeCollector FeeCollector,62	contractCaller helper.IContractCaller,63	sigGasConsumer SignatureVerificationGasConsumer,64) sdk.AnteHandler {65	return func(ctx sdk.Context, tx sdk.Tx, simulate bool) (newCtx sdk.Context, res sdk.Result, abort bool) {66		// get module address67		if addr := feeCollector.GetModuleAddress(authTypes.FeeCollectorName); addr.Empty() {68			return newCtx, sdk.ErrInternal(fmt.Sprintf("%s module account has not been set", authTypes.FeeCollectorName)).Result(), true69		}70		// all transactions must be of type auth.StdTx71		stdTx, ok := tx.(authTypes.StdTx)72		if !ok {73			// Set a gas meter with limit 0 as to prevent an infinite gas meter attack74			// during runTx.75			newCtx = SetGasMeter(simulate, ctx, 0)76			return newCtx, sdk.ErrInternal("tx must be StdTx").Result(), true77		}78		// get account params79		params := ak.GetParams(ctx)80		// gas for tx81		gasForTx := params.MaxTxGas // stdTx.Fee.Gas82		amount, ok := sdk.NewIntFromString(params.TxFees)83		if !ok {84			return newCtx, sdk.ErrInternal("Invalid param tx fees").Result(), true85		}86		feeForTx := sdk.Coins{sdk.Coin{Denom: authTypes.FeeToken, Amount: amount}} // stdTx.Fee.Amount87		// checkpoint gas limit88		if stdTx.Msg.Type() == "checkpoint" && stdTx.Msg.Route() == "checkpoint" {89			gasForTx = gasWantedPerCheckpoinTx // stdTx.Fee.Gas90		}91		// new gas meter92		newCtx = SetGasMeter(simulate, ctx, gasForTx)93		// AnteHandlers must have their own defer/recover in order for the BaseApp94		// to know how much gas was used! This is because the GasMeter is created in95		// the AnteHandler, but if it panics the context won't be set properly in96		// runTx's recover call.97		defer func() {98			if r := recover(); r != nil {99				switch rType := r.(type) {100				case sdk.ErrorOutOfGas:101					log := fmt.Sprintf(102						"out of gas in location: %v; gasWanted: %d, gasUsed: %d",103						rType.Descriptor, gasForTx, newCtx.GasMeter().GasConsumed(),104					)105					res = sdk.ErrOutOfGas(log).Result()106					res.GasWanted = gasForTx107					res.GasUsed = newCtx.GasMeter().GasConsumed()108					abort = true109				default:110					panic(r)111				}112			}113		}()114		// validate tx115		if err := tx.ValidateBasic(); err != nil {116			return newCtx, err.Result(), true117		}118		if res := ValidateMemo(stdTx, params); !res.IsOK() {119			return newCtx, res, true120		}121		// stdSigs contains the sequence number, account number, and signatures.122		// When simulating, this would just be a 0-length slice.123		signerAddrs := stdTx.GetSigners()124		if len(signerAddrs) == 0 {125			return newCtx, sdk.ErrNoSignatures("no signers").Result(), true126		}127		if len(signerAddrs) > 1 {128			return newCtx, sdk.ErrUnauthorized("wrong number of signers").Result(), true129		}130		isGenesis := ctx.BlockHeight() == 0131		// fetch first signer, who's going to pay the fees132		signerAcc, res := GetSignerAcc(newCtx, ak, types.AccAddressToHeimdallAddress(signerAddrs[0]))133		if !res.IsOK() {134			return newCtx, res, true135		}136		// deduct the fees137		if !feeForTx.IsZero() {138			res = DeductFees(feeCollector, newCtx, signerAcc, feeForTx)139			if !res.IsOK() {140				return newCtx, res, true141			}142			// reload the account as fees have been deducted143			signerAcc = ak.GetAccount(newCtx, signerAcc.GetAddress())144		}145		// get chain manager params146		chainParams := chainKeeper.GetParams(ctx)147		// check main chain tx is confirmed transaction148		mainTxMsg, ok := stdTx.Msg.(MainTxMsg)149		if ok && !contractCaller.IsTxConfirmed(ctx.BlockTime(), mainTxMsg.GetTxHash().EthHash(), chainParams.TxConfirmationTime) {150			return newCtx, sdk.ErrInternal(fmt.Sprintf("Not enough tx confirmations for %s", mainTxMsg.GetTxHash().Hex())).Result(), true151		}152		// stdSigs contains the sequence number, account number, and signatures.153		// When simulating, this would just be a 0-length slice.154		stdSigs := stdTx.GetSignatures()155		// check signature, return account with incremented nonce156		signBytes := GetSignBytes(newCtx.ChainID(), stdTx, signerAcc, isGenesis)157		signerAcc, res = processSig(newCtx, signerAcc, stdSigs[0], signBytes, simulate, params, sigGasConsumer)158		if !res.IsOK() {159			return newCtx, res, true160		}161		ak.SetAccount(newCtx, signerAcc)162		// TODO: tx tags (?)163		return newCtx, sdk.Result{GasWanted: gasForTx}, false // continue...164	}165}166// GetSignerAcc returns an account for a given address that is expected to sign167// a transaction.168func GetSignerAcc(169	ctx sdk.Context,170	ak AccountKeeper,171	addr types.HeimdallAddress,172) (authTypes.Account, sdk.Result) {173	if acc := ak.GetAccount(ctx, addr); acc != nil {174		return acc, sdk.Result{}175	}176	return nil, sdk.ErrUnknownAddress(fmt.Sprintf("account %s does not exist", addr)).Result()177}178// ValidateMemo validates the memo size.179func ValidateMemo(stdTx authTypes.StdTx, params authTypes.Params) sdk.Result {180	memoLength := len(stdTx.GetMemo())181	if uint64(memoLength) > params.MaxMemoCharacters {182		return sdk.ErrMemoTooLarge(183			fmt.Sprintf(184				"maximum number of characters is %d but received %d characters",185				params.MaxMemoCharacters, memoLength,186			),187		).Result()188	}189	return sdk.Result{}190}191// verify the signature and increment the sequence. If the account doesn't have192// a pubkey, set it.193func processSig(194	ctx sdk.Context,195	acc authTypes.Account,196	sig authTypes.StdSignature,197	signBytes []byte,198	simulate bool,199	params authTypes.Params,200	sigGasConsumer SignatureVerificationGasConsumer,201) (updatedAcc authTypes.Account, res sdk.Result) {202	if res := sigGasConsumer(ctx.GasMeter(), sig, params); !res.IsOK() {203		return nil, res204	}205	if !simulate {206		var pk secp256k1.PubKeySecp256k1207		p, err := authTypes.RecoverPubkey(signBytes, sig.Bytes())208		copy(pk[:], p[:])209		if err != nil || !bytes.Equal(acc.GetAddress().Bytes(), pk.Address().Bytes()) {210			return nil, sdk.ErrUnauthorized("signature verification failed; verify correct account sequence and chain-id").Result()211		}212		if acc.GetPubKey() == nil {213			var cryptoPk crypto.PubKey = pk214			if err := acc.SetPubKey(cryptoPk); err != nil {215				return nil, sdk.ErrUnauthorized("error while updating account pubkey").Result()216			}217		}218	}219	if err := acc.SetSequence(acc.GetSequence() + 1); err != nil {220		return nil, sdk.ErrUnauthorized("error while updating account sequence").Result()221	}222	return acc, res223}224// DefaultSigVerificationGasConsumer is the default implementation of SignatureVerificationGasConsumer. It consumes gas225// for signature verification based upon the public key type. The cost is fetched from the given params and is matched226// by the concrete type.227func DefaultSigVerificationGasConsumer(228	meter sdk.GasMeter, sig authTypes.StdSignature, params authTypes.Params,229) sdk.Result {230	meter.ConsumeGas(params.SigVerifyCostSecp256k1, "ante verify: secp256k1")231	return sdk.Result{}232}233// DeductFees deducts fees from the given account.234//235// NOTE: We could use the CoinKeeper (in addition to the AccountKeeper, because236// the CoinKeeper doesn't give us accounts), but it seems easier to do this.237func DeductFees(feeCollector FeeCollector, ctx sdk.Context, acc authTypes.Account, fees sdk.Coins) sdk.Result {238	blockTime := ctx.BlockHeader().Time239	coins := acc.GetCoins()240	if !fees.IsValid() {241		return sdk.ErrInsufficientFee(fmt.Sprintf("invalid fee amount: %s", fees)).Result()242	}243	// verify the account has enough funds to pay for fees244	_, hasNeg := coins.SafeSub(fees)245	if hasNeg {246		return sdk.ErrInsufficientFunds(247			fmt.Sprintf("insufficient funds to pay for fees; %s < %s", coins, fees),248		).Result()249	}250	// Validate the account has enough "spendable" coins251	spendableCoins := acc.SpendableCoins(blockTime)252	if _, hasNeg := spendableCoins.SafeSub(fees); hasNeg {253		return sdk.ErrInsufficientFunds(254			fmt.Sprintf("insufficient funds to pay for fees; %s < %s", spendableCoins, fees),255		).Result()256	}257	err := feeCollector.SendCoinsFromAccountToModule(ctx, acc.GetAddress(), authTypes.FeeCollectorName, fees)258	if err != nil {259		return err.Result()260	}261	return sdk.Result{}262}263// SetGasMeter returns a new context with a gas meter set from a given context.264func SetGasMeter(simulate bool, ctx sdk.Context, gasLimit uint64) sdk.Context {265	// In various cases such as simulation and during the genesis block, we do not266	// meter any gas utilization.267	if simulate || ctx.BlockHeight() == 0 {268		return ctx.WithGasMeter(sdk.NewInfiniteGasMeter())269	}270	return ctx.WithGasMeter(sdk.NewGasMeter(gasLimit))271}272// GetSignBytes returns a slice of bytes to sign over for a given transaction273// and an account.274func GetSignBytes(chainID string, stdTx authTypes.StdTx, acc authTypes.Account, genesis bool) []byte {275	var accNum uint64276	if !genesis {277		accNum = acc.GetAccountNumber()278	}279	return authTypes.StdSignBytes(chainID, accNum, acc.GetSequence(), stdTx.Msg, stdTx.Memo)280}...

func.go

Source:func.go

1package main2import (3	"context"4	"encoding/json"5	"fmt"6	"io"7	"log"8	"strconv"9	"time"10	fdk "github.com/fnproject/fdk-go"11	zipkin "github.com/openzipkin/zipkin-go"12	"github.com/openzipkin/zipkin-go/model"13	zipkinHttpReporter "github.com/openzipkin/zipkin-go/reporter/http"14)15func main() {16	fdk.Handle(fdk.HandlerFunc(myHandler))17}18type Person struct {19	Name string `json:"name"`20}21func myHandler(ctx context.Context, in io.Reader, out io.Writer) {22	p := &Person{Name: "World"}23	json.NewDecoder(in).Decode(p)24	newCtx := fdk.GetContext(ctx)25	// Span main method26	// set up a span reporter27	reporter := zipkinHttpReporter.NewReporter(newCtx.TracingContextData().TraceCollectorURL())28	defer reporter.Close()29	// create our local service endpoint30	endpoint, err := zipkin.NewEndpoint(newCtx.ServiceName(), "")31	if err != nil {32		log.Fatalf("unable to create local endpoint: %+v\n", err)33	}34	// initialize our tracer35	tracer, err := zipkin.NewTracer(reporter, zipkin.WithLocalEndpoint(endpoint))36	// Set Context37	sctx := setContext(newCtx)38	sopt := zipkin.Parent(sctx)39	span, ctx := tracer.StartSpanFromContext(context.Background(), "Main Method", sopt)40	time.Sleep(15 * time.Millisecond)41	if err != nil {42		log.Fatalf("unable to create tracer: %+v\n", err)43	}44	oneMethod(ctx, tracer)45	msg := struct {46		Msg string `json:"message"`47	}{48		Msg: fmt.Sprintf("Hello %s :: and Service :: %s", newCtx.AppID(), newCtx.AppName()),49	}50	log.Print("Inside Go Hello World function")51	json.NewEncoder(out).Encode(&msg)52	span.Finish()53}54func setContext(ctx fdk.Context) model.SpanContext {55	traceId, err := model.TraceIDFromHex(ctx.TracingContextData().TraceId())56	if err != nil {57		log.Println("TRACE ID NOT DEFINED.....")58		return model.SpanContext{}59	}60	id, err := strconv.ParseUint(ctx.TracingContextData().SpanId(), 16, 64)61	if err != nil {62		log.Println("SPAN ID NOT DEFINED.....")63		return model.SpanContext{}64	}65	i := model.ID(id)66	sctx := model.SpanContext{67		TraceID:  traceId,68		ID:       i,69		ParentID: nil,70		Sampled:  BoolAddr(ctx.TracingContextData().IsSampled()),71	}72	return sctx73}74func BoolAddr(b bool) *bool {75	boolVar := b76	return &boolVar77}78func oneMethod(ctx context.Context, tracer *zipkin.Tracer) {79	span, newCtx := tracer.StartSpanFromContext(ctx, "OneChildSpan")80	time.Sleep(80 * time.Millisecond)81	ctx = newCtx82	secMethod(ctx, tracer)83	span.Finish()84}85func secMethod(ctx context.Context, tracer *zipkin.Tracer) {86	span, newCtx := tracer.StartSpanFromContext(ctx, "SecChildSpan")87	time.Sleep(100 * time.Millisecond)88	ctx = newCtx89	span.Finish()90}...

main.go

Source:main.go

1package main2import (3	"context"4	"fmt"5	"github.com/10hin/cache-eks-creds/cmd"6	"github.com/10hin/cache-eks-creds/pkg/cache"7	"github.com/10hin/cache-eks-creds/pkg/kubeconfig_resolver"8	"github.com/10hin/cache-eks-creds/pkg/profile_resolver"9	"os"10	"os/signal"11	"syscall"12)13func main() {14	emptyCtx := context.Background()15	ctxWithComponents := storeComponents(emptyCtx, map[string]interface{}{16		cache.Key:               cache.NewFileCache(),17		profile_resolver.Key:    profile_resolver.NewProfileResolver(),18		kubeconfig_resolver.Key: kubeconfig_resolver.NewKubeconfigResolver(),19	})20	ctx, cancel := context.WithCancel(ctxWithComponents)21	defer cancel()22	sigChan := make(chan os.Signal, 0)23	signal.Notify(sigChan, syscall.SIGINT)24	complete := make(chan struct{}, 0)25	go func(ctx1 context.Context, complete1 chan<- struct{}) {26		defer func() {27			close(complete1)28		}()29		err1 := cmd.ExecuteContext(ctx1)30		if err1 != nil {31			panic(err1)32		}33	}(ctx, complete)34	select {35	case <-sigChan:36		fmt.Println("SIGINT received!")37		panic(fmt.Errorf("interrpted"))38	case <-complete:39	}40}41func storeComponents(ctx context.Context, components map[string]interface{}) context.Context {42	var newCtx context.Context = nil43	for key, comp := range components {44		if newCtx == nil {45			newCtx = context.WithValue(ctx, key, comp)46		} else {47			newCtx = context.WithValue(newCtx, key, comp)48		}49	}50	return newCtx51}...

NewCtx

Using AI Code Generation

1import (2func main() {3	ctx, cancel := context.WithCancel(context.Background())4	defer cancel()5	go doSomething(ctx, 5*time.Second)6	time.Sleep(10 * time.Second)7}8func doSomething(ctx context.Context, duration time.Duration) {9	select {10	case <-time.After(duration):11		fmt.Println("Done")12	case <-ctx.Done():13		fmt.Println("Canceled")14	}15}

NewCtx

Using AI Code Generation

1import (2func main() {3	ctx := context.Background()4	ctx, cancel := context.WithCancel(ctx)5	go func() {6		time.Sleep(5 * time.Second)7		cancel()8	}()9	select {10	case <-time.After(6 * time.Second):11		fmt.Println("overslept")12	case <-ctx.Done():13		fmt.Println("context done")14	}15}

NewCtx

Using AI Code Generation

1import (2func main() {3	ctx := main.NewCtx()4	fmt.Println(ctx)5}6&{0xc00000e020 0xc00000e040 0xc00000e060 0xc00000e080 0xc00000e0a0 0xc00000e0c0 0xc00000e0e0 0xc00000e100 0xc00000e120 0xc00000e140 0xc00000e160 0xc00000e180 0xc00000e1a0 0xc00000e1c0 0xc00000e1e0 0xc00000e200 0xc00000e220 0xc00000e240 0xc00000e260 0xc00000e280 0xc00000e2a0 0xc00000e2c0 0xc00000e2e0 0xc00000e300 0xc00000e320 0xc00000e340 0xc00000e360 0xc00000e380 0xc00000e3a0 0xc00000e3c0 0xc00000e3e0 0xc00000e400 0xc00000e420 0xc00000e440 0xc00000e460 0xc00000e480 0xc00000e4a0 0xc00000e4c0 0xc00000e4e0 0xc00000e500 0xc00000e520 0xc00000e540 0xc00000e560 0xc00000e580 0xc00000e5a0 0xc00000e5c0 0xc00000e5e0 0xc00000e600 0xc00000e620 0xc00000e640 0xc00000e660 0xc00000e680 0xc00000e6a0 0xc00000e6c0 0xc00000e6e0 0xc00000e700 0xc00000e720 0xc00000e740 0xc00000

NewCtx

Using AI Code Generation

1import (2func main() {3	ctx := ctx.NewCtx()4	fmt.Println(ctx)5}6&{0xc0000101e0}7import (8func main() {9	ctx := context.Background()10	fmt.Println(ctx)11}12context.Background.WithCancel.WithValue(type string, val ).WithValue(type string, val )

NewCtx

Using AI Code Generation

1import (2func main() {3	ctx := NewCtx()4	ctx1 := NewCtx()5	fmt.Println(ctx)6	fmt.Println(ctx1)7}8import (9func main() {10	ctx := NewCtx()11	ctx1 := context.WithValue(ctx, "key", "value")12	fmt.Println(ctx)13	fmt.Println(ctx1)14}15import (

NewCtx

Using AI Code Generation

1import (2func main() {3 ctx := main.NewCtx()4 fmt.Println(ctx)5}6&{0xc00000e1e0}

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