refactor: improve error messages (cosmos#11762)

## Description

Closes: #XXXX



---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

errors/CHANGELOG.md

@@ -29,6 +29,12 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 # Changelog
 
+## [Unreleased]
+
+### Improvements
+
+* [\#11762](https://github.com/cosmos/cosmos-sdk/pull/11762) Improve error messages
+
 ## v1.0.0
 
 ### Features

errors/abci.go

@@ -112,7 +112,7 @@ func errIsNil(err error) bool {
 	return false
 }
 
-var errPanicWithMsg = Wrapf(ErrPanic, "panic message redacted to hide potentially sensitive system info")
+var errPanicWithMsg = Wrapf(ErrPanic, "error message redacted to hide potential sensitive info. Use the '--trace' flag if you are running a node to see the full stack trace error")
 
 // Redact replaces an error that is not initialized as an ABCI Error with a
 // generic internal error instance. If the error is an ABCI Error, that error is

errors/abci_test.go

@@ -233,7 +233,7 @@ func (s *abciTestSuite) TestABCIInfoSerializeErr() {
 		},
 		"redact in default encoder": {
 			src: myPanic,
-			exp: "panic message redacted to hide potentially sensitive system info: panic",
+			exp: "error message redacted to hide potential sensitive info. Use the '--trace' flag if you are running a node to see the full stack trace error: panic",
 		},
 		"do not redact in debug encoder": {
 			src:   myPanic,

types/decimal.go

@@ -143,7 +143,7 @@ func NewDecFromIntWithPrec(i Int, prec int64) Dec {
 // CONTRACT - This function does not mutate the input str.
 func NewDecFromStr(str string) (Dec, error) {
 	if len(str) == 0 {
-		return Dec{}, ErrEmptyDecimalStr
+		return Dec{}, fmt.Errorf("%s: %w", str, ErrEmptyDecimalStr)
 	}
 
 	// first extract any negative symbol
@@ -154,7 +154,7 @@ func NewDecFromStr(str string) (Dec, error) {
 	}
 
 	if len(str) == 0 {
-		return Dec{}, ErrEmptyDecimalStr
+		return Dec{}, fmt.Errorf("%s: %w", str, ErrEmptyDecimalStr)
 	}
 
 	strs := strings.Split(str, ".")
@@ -172,7 +172,7 @@ func NewDecFromStr(str string) (Dec, error) {
 	}
 
 	if lenDecs > Precision {
-		return Dec{}, fmt.Errorf("invalid precision; max: %d, got: %d", Precision, lenDecs)
+		return Dec{}, fmt.Errorf("value '%s' exceeds max precision by %d decimal places: max precision %d", str, Precision-lenDecs, Precision)
 	}
 
 	// add some extra zero's to correct to the Precision factor
@@ -182,10 +182,10 @@ func NewDecFromStr(str string) (Dec, error) {
 
 	combined, ok := new(big.Int).SetString(combinedStr, 10) // base 10
 	if !ok {
-		return Dec{}, fmt.Errorf("failed to set decimal string: %s", combinedStr)
+		return Dec{}, fmt.Errorf("failed to set decimal string with base 10: %s", combinedStr)
 	}
 	if combined.BitLen() > maxDecBitLen {
-		return Dec{}, fmt.Errorf("decimal out of range; bitLen: got %d, max %d", combined.BitLen(), maxDecBitLen)
+		return Dec{}, fmt.Errorf("decimal '%s' out of range; bitLen: got %d, max %d", str, combined.BitLen(), maxDecBitLen)
 	}
 	if neg {
 		combined = new(big.Int).Neg(combined)