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package osmoutils
import (
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"github.com/cosmos/cosmos-sdk/store/types"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// This function lets you run the function f, but if theres an error or panic
// drop the state machine change and log the error.
// If there is no error, proceeds as normal (but with some slowdown due to SDK store weirdness)
// Try to avoid usage of iterators in f.
func ApplyFuncIfNoError(ctx sdk.Context, f func(ctx sdk.Context) error) (err error) {
// Add a panic safeguard
defer func() {
if recoveryError := recover(); recoveryError != nil {
PrintPanicRecoveryError(ctx, recoveryError)
err = errors.New("panic occurred during execution")
// makes a new cache context, which all state changes get wrapped inside of.
cacheCtx, write := ctx.CacheContext()
if err != nil {
ctx.Logger().Error(err.Error())
} else {
// no error, write the output of f
write()
ctx.EventManager().EmitEvents(cacheCtx.EventManager().Events())
}
}
// PrintPanicRecoveryError error logs the recoveryError, along with the stacktrace, if it can be parsed.
// If not emits them to stdout.
func PrintPanicRecoveryError(ctx sdk.Context, recoveryError interface{}) {
errStackTrace := string(debug.Stack())
switch e := recoveryError.(type) {
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case types.ErrorOutOfGas:
ctx.Logger().Debug("out of gas error inside panic recovery block: " + e.Descriptor)
return
case string:
ctx.Logger().Error("Recovering from (string) panic: " + e)
case runtime.Error:
ctx.Logger().Error("recovered (runtime.Error) panic: " + e.Error())
case error:
ctx.Logger().Error("recovered (error) panic: " + e.Error())
default:
ctx.Logger().Error("recovered (default) panic. Could not capture logs in ctx, see stdout")
fmt.Println("Recovering from panic ", recoveryError)
debug.PrintStack()
return
}
ctx.Logger().Error("stack trace: " + errStackTrace)
}