[chore] update dependencies (#4539)

- github.com/KimMachineGun/automemlimit: v0.7.4 -> v0.7.5
- github.com/tdewolff/minify/v2: v2.24.4 -> v2.24.5
- modernc.org/sqlite: v1.39.1 -> v1.40.0 w/ concurrency workaround
- github.com/go-swagger/go-swagger: v0.32.3 -> v0.33.1 (and drops use of our custom fork now the fix is available upstream)

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4539
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

5 files changed, 712 insertions, 197 deletions

diff --git a/vendor/github.com/shopspring/decimal/.travis.yml b/vendor/github.com/shopspring/decimal/.travis.yml
deleted file mode 100644
index 6326d40f0..000000000
--- a/vendor/github.com/shopspring/decimal/.travis.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-language: go
-
-arch: 
- - amd64
- - ppc64le
-
-go:
-  - 1.7.x
-  - 1.14.x
-  - 1.15.x
-  - 1.16.x
-  - 1.17.x
-  - tip
-
-install:
-  - go build .
-
-script:
-  - go test -v
diff --git a/vendor/github.com/shopspring/decimal/CHANGELOG.md b/vendor/github.com/shopspring/decimal/CHANGELOG.md
index aea61154b..432d0fd4e 100644
--- a/vendor/github.com/shopspring/decimal/CHANGELOG.md
+++ b/vendor/github.com/shopspring/decimal/CHANGELOG.md
@@ -1,3 +1,30 @@
+## Decimal v1.4.0
+#### BREAKING
+- Drop support for Go version older than 1.10 [#361](https://github.com/shopspring/decimal/pull/361)
+
+#### FEATURES
+- Add implementation of natural logarithm [#339](https://github.com/shopspring/decimal/pull/339) [#357](https://github.com/shopspring/decimal/pull/357)
+- Add improved implementation of power operation [#358](https://github.com/shopspring/decimal/pull/358)
+- Add Compare method which forwards calls to Cmp [#346](https://github.com/shopspring/decimal/pull/346)
+- Add NewFromBigRat constructor [#288](https://github.com/shopspring/decimal/pull/288)
+- Add NewFromUint64 constructor [#352](https://github.com/shopspring/decimal/pull/352)
+
+#### ENHANCEMENTS
+- Migrate to Github Actions [#245](https://github.com/shopspring/decimal/pull/245) [#340](https://github.com/shopspring/decimal/pull/340)
+- Fix examples for RoundDown, RoundFloor, RoundUp, and RoundCeil [#285](https://github.com/shopspring/decimal/pull/285) [#328](https://github.com/shopspring/decimal/pull/328) [#341](https://github.com/shopspring/decimal/pull/341)
+- Use Godoc standard to mark deprecated Equals and StringScaled methods [#342](https://github.com/shopspring/decimal/pull/342)
+- Removed unnecessary min function for RescalePair method [#265](https://github.com/shopspring/decimal/pull/265)
+- Avoid reallocation of initial slice in MarshalBinary (GobEncode) [#355](https://github.com/shopspring/decimal/pull/355)
+- Optimize NumDigits method [#301](https://github.com/shopspring/decimal/pull/301) [#356](https://github.com/shopspring/decimal/pull/356)
+- Optimize BigInt method [#359](https://github.com/shopspring/decimal/pull/359)
+- Support scanning uint64 [#131](https://github.com/shopspring/decimal/pull/131) [#364](https://github.com/shopspring/decimal/pull/364)
+- Add docs section with alternative libraries [#363](https://github.com/shopspring/decimal/pull/363)
+
+#### BUGFIXES
+- Fix incorrect calculation of decimal modulo [#258](https://github.com/shopspring/decimal/pull/258) [#317](https://github.com/shopspring/decimal/pull/317)
+- Allocate new(big.Int) in Copy method to deeply clone it [#278](https://github.com/shopspring/decimal/pull/278)
+- Fix overflow edge case in QuoRem method [#322](https://github.com/shopspring/decimal/pull/322)
+
 ## Decimal v1.3.1
 
 #### ENHANCEMENTS
diff --git a/vendor/github.com/shopspring/decimal/README.md b/vendor/github.com/shopspring/decimal/README.md
index 2e35df068..318c9df58 100644
--- a/vendor/github.com/shopspring/decimal/README.md
+++ b/vendor/github.com/shopspring/decimal/README.md
@@ -1,6 +1,8 @@
 # decimal
 
-[![Build Status](https://app.travis-ci.com/shopspring/decimal.svg?branch=master)](https://app.travis-ci.com/shopspring/decimal) [![GoDoc](https://godoc.org/github.com/shopspring/decimal?status.svg)](https://godoc.org/github.com/shopspring/decimal) [![Go Report Card](https://goreportcard.com/badge/github.com/shopspring/decimal)](https://goreportcard.com/report/github.com/shopspring/decimal)
+[![ci](https://github.com/shopspring/decimal/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/shopspring/decimal/actions/workflows/ci.yml)
+[![GoDoc](https://godoc.org/github.com/shopspring/decimal?status.svg)](https://godoc.org/github.com/shopspring/decimal) 
+[![Go Report Card](https://goreportcard.com/badge/github.com/shopspring/decimal)](https://goreportcard.com/report/github.com/shopspring/decimal)
 
 Arbitrary-precision fixed-point decimal numbers in go.
 
@@ -20,7 +22,12 @@ Run `go get github.com/shopspring/decimal`
 
 ## Requirements 
 
-Decimal library requires Go version `>=1.7`
+Decimal library requires Go version `>=1.10`
+
+## Documentation
+
+http://godoc.org/github.com/shopspring/decimal
+
 
 ## Usage
 
@@ -57,14 +64,16 @@ func main() {
 }
 ```
 
-## Documentation
-
-http://godoc.org/github.com/shopspring/decimal
+## Alternative libraries
 
-## Production Usage
+When working with decimal numbers, you might face problems this library is not perfectly suited for. 
+Fortunately, thanks to the wonderful community we have a dozen other libraries that you can choose from.  
+Explore other alternatives to find the one that best fits your needs :)  
 
-* [Spring](https://shopspring.com/), since August 14, 2014.
-* If you are using this in production, please let us know!
+* [cockroachdb/apd](https://github.com/cockroachdb/apd) - arbitrary precision, mutable and rich API similar to `big.Int`, more performant than this library 
+* [alpacahq/alpacadecimal](https://github.com/alpacahq/alpacadecimal) - high performance, low precision (12 digits), fully compatible API with this library 
+* [govalues/decimal](https://github.com/govalues/decimal) - high performance, zero-allocation, low precision (19 digits)
+* [greatcloak/decimal](https://github.com/greatcloak/decimal) - fork focusing on billing and e-commerce web application related use cases, includes out-of-the-box BSON marshaling support
 
 ## FAQ
 
diff --git a/vendor/github.com/shopspring/decimal/const.go b/vendor/github.com/shopspring/decimal/const.go
new file mode 100644
index 000000000..e5d6fa87e
--- /dev/null
+++ b/vendor/github.com/shopspring/decimal/const.go
@@ -0,0 +1,63 @@
+package decimal
+
+import (
+	"strings"
+)
+
+const (
+	strLn10 = "2.302585092994045684017991454684364207601101488628772976033327900967572609677352480235997205089598298341967784042286248633409525465082806756666287369098781689482907208325554680843799894826233198528393505308965377732628846163366222287698219886746543667474404243274365155048934314939391479619404400222105101714174800368808401264708068556774321622835522011480466371565912137345074785694768346361679210180644507064800027750268491674655058685693567342067058113642922455440575892572420824131469568901675894025677631135691929203337658714166023010570308963457207544037084746994016826928280848118428931484852494864487192780967627127577539702766860595249671667418348570442250719796500471495105049221477656763693866297697952211071826454973477266242570942932258279850258550978526538320760672631716430950599508780752371033310119785754733154142180842754386359177811705430982748238504564801909561029929182431823752535770975053956518769751037497088869218020518933950723853920514463419726528728696511086257149219884997874887377134568620916705849807828059751193854445009978131146915934666241071846692310107598438319191292230792503747298650929009880391941702654416816335727555703151596113564846546190897042819763365836983716328982174407366009162177850541779276367731145041782137660111010731042397832521894898817597921798666394319523936855916447118246753245630912528778330963604262982153040874560927760726641354787576616262926568298704957954913954918049209069438580790032763017941503117866862092408537949861264933479354871737451675809537088281067452440105892444976479686075120275724181874989395971643105518848195288330746699317814634930000321200327765654130472621883970596794457943468343218395304414844803701305753674262153675579814770458031413637793236291560128185336498466942261465206459942072917119370602444929358037007718981097362533224548366988505528285966192805098447175198503666680874970496982273220244823343097169111136813588418696549323714996941979687803008850408979618598756579894836445212043698216415292987811742973332588607915912510967187510929248475023930572665446276200923068791518135803477701295593646298412366497023355174586195564772461857717369368404676577047874319780573853271810933883496338813069945569399346101090745616033312247949360455361849123333063704751724871276379140924398331810164737823379692265637682071706935846394531616949411701841938119405416449466111274712819705817783293841742231409930022911502362192186723337268385688273533371925103412930705632544426611429765388301822384091026198582888433587455960453004548370789052578473166283701953392231047527564998119228742789713715713228319641003422124210082180679525276689858180956119208391760721080919923461516952599099473782780648128058792731993893453415320185969711021407542282796298237068941764740642225757212455392526179373652434440560595336591539160312524480149313234572453879524389036839236450507881731359711238145323701508413491122324390927681724749607955799151363982881058285740538000653371655553014196332241918087621018204919492651483892"
+)
+
+var (
+	ln10 = newConstApproximation(strLn10)
+)
+
+type constApproximation struct {
+	exact          Decimal
+	approximations []Decimal
+}
+
+func newConstApproximation(value string) constApproximation {
+	parts := strings.Split(value, ".")
+	coeff, fractional := parts[0], parts[1]
+
+	coeffLen := len(coeff)
+	maxPrecision := len(fractional)
+
+	var approximations []Decimal
+	for p := 1; p < maxPrecision; p *= 2 {
+		r := RequireFromString(value[:coeffLen+p])
+		approximations = append(approximations, r)
+	}
+
+	return constApproximation{
+		RequireFromString(value),
+		approximations,
+	}
+}
+
+// Returns the smallest approximation available that's at least as precise
+// as the passed precision (places after decimal point), i.e. Floor[ log2(precision) ] + 1
+func (c constApproximation) withPrecision(precision int32) Decimal {
+	i := 0
+
+	if precision >= 1 {
+		i++
+	}
+
+	for precision >= 16 {
+		precision /= 16
+		i += 4
+	}
+
+	for precision >= 2 {
+		precision /= 2
+		i++
+	}
+
+	if i >= len(c.approximations) {
+		return c.exact
+	}
+
+	return c.approximations[i]
+}
diff --git a/vendor/github.com/shopspring/decimal/decimal.go b/vendor/github.com/shopspring/decimal/decimal.go
index 84405ec1c..a37a2301e 100644
--- a/vendor/github.com/shopspring/decimal/decimal.go
+++ b/vendor/github.com/shopspring/decimal/decimal.go
@@ -4,14 +4,14 @@
 //
 // The best way to create a new Decimal is to use decimal.NewFromString, ex:
 //
-//     n, err := decimal.NewFromString("-123.4567")
-//     n.String() // output: "-123.4567"
+//	n, err := decimal.NewFromString("-123.4567")
+//	n.String() // output: "-123.4567"
 //
 // To use Decimal as part of a struct:
 //
-//     type Struct struct {
-//         Number Decimal
-//     }
+//	type StructName struct {
+//	    Number Decimal
+//	}
 //
 // Note: This can "only" represent numbers with a maximum of 2^31 digits after the decimal point.
 package decimal
@@ -32,18 +32,31 @@ import (
 //
 // Example:
 //
-//     d1 := decimal.NewFromFloat(2).Div(decimal.NewFromFloat(3))
-//     d1.String() // output: "0.6666666666666667"
-//     d2 := decimal.NewFromFloat(2).Div(decimal.NewFromFloat(30000))
-//     d2.String() // output: "0.0000666666666667"
-//     d3 := decimal.NewFromFloat(20000).Div(decimal.NewFromFloat(3))
-//     d3.String() // output: "6666.6666666666666667"
-//     decimal.DivisionPrecision = 3
-//     d4 := decimal.NewFromFloat(2).Div(decimal.NewFromFloat(3))
-//     d4.String() // output: "0.667"
-//
+//	d1 := decimal.NewFromFloat(2).Div(decimal.NewFromFloat(3))
+//	d1.String() // output: "0.6666666666666667"
+//	d2 := decimal.NewFromFloat(2).Div(decimal.NewFromFloat(30000))
+//	d2.String() // output: "0.0000666666666667"
+//	d3 := decimal.NewFromFloat(20000).Div(decimal.NewFromFloat(3))
+//	d3.String() // output: "6666.6666666666666667"
+//	decimal.DivisionPrecision = 3
+//	d4 := decimal.NewFromFloat(2).Div(decimal.NewFromFloat(3))
+//	d4.String() // output: "0.667"
 var DivisionPrecision = 16
 
+// PowPrecisionNegativeExponent specifies the maximum precision of the result (digits after decimal point)
+// when calculating decimal power. Only used for cases where the exponent is a negative number.
+// This constant applies to Pow, PowInt32 and PowBigInt methods, PowWithPrecision method is not constrained by it.
+//
+// Example:
+//
+//	d1, err := decimal.NewFromFloat(15.2).PowInt32(-2)
+//	d1.String() // output: "0.0043282548476454"
+//
+//	decimal.PowPrecisionNegativeExponent = 24
+//	d2, err := decimal.NewFromFloat(15.2).PowInt32(-2)
+//	d2.String() // output: "0.004328254847645429362881"
+var PowPrecisionNegativeExponent = 16
+
 // MarshalJSONWithoutQuotes should be set to true if you want the decimal to
 // be JSON marshaled as a number, instead of as a string.
 // WARNING: this is dangerous for decimals with many digits, since many JSON
@@ -91,12 +104,12 @@ func New(value int64, exp int32) Decimal {
 	}
 }
 
-// NewFromInt converts a int64 to Decimal.
+// NewFromInt converts an int64 to Decimal.
 //
 // Example:
 //
-//     NewFromInt(123).String() // output: "123"
-//     NewFromInt(-10).String() // output: "-10"
+//	NewFromInt(123).String() // output: "123"
+//	NewFromInt(-10).String() // output: "-10"
 func NewFromInt(value int64) Decimal {
 	return Decimal{
 		value: big.NewInt(value),
@@ -104,12 +117,12 @@ func NewFromInt(value int64) Decimal {
 	}
 }
 
-// NewFromInt32 converts a int32 to Decimal.
+// NewFromInt32 converts an int32 to Decimal.
 //
 // Example:
 //
-//     NewFromInt(123).String() // output: "123"
-//     NewFromInt(-10).String() // output: "-10"
+//	NewFromInt(123).String() // output: "123"
+//	NewFromInt(-10).String() // output: "-10"
 func NewFromInt32(value int32) Decimal {
 	return Decimal{
 		value: big.NewInt(int64(value)),
@@ -117,6 +130,18 @@ func NewFromInt32(value int32) Decimal {
 	}
 }
 
+// NewFromUint64 converts an uint64 to Decimal.
+//
+// Example:
+//
+//	NewFromUint64(123).String() // output: "123"
+func NewFromUint64(value uint64) Decimal {
+	return Decimal{
+		value: new(big.Int).SetUint64(value),
+		exp:   0,
+	}
+}
+
 // NewFromBigInt returns a new Decimal from a big.Int, value * 10 ^ exp
 func NewFromBigInt(value *big.Int, exp int32) Decimal {
 	return Decimal{
@@ -125,15 +150,33 @@ func NewFromBigInt(value *big.Int, exp int32) Decimal {
 	}
 }
 
+// NewFromBigRat returns a new Decimal from a big.Rat. The numerator and
+// denominator are divided and rounded to the given precision.
+//
+// Example:
+//
+//	d1 := NewFromBigRat(big.NewRat(0, 1), 0)    // output: "0"
+//	d2 := NewFromBigRat(big.NewRat(4, 5), 1)    // output: "0.8"
+//	d3 := NewFromBigRat(big.NewRat(1000, 3), 3) // output: "333.333"
+//	d4 := NewFromBigRat(big.NewRat(2, 7), 4)    // output: "0.2857"
+func NewFromBigRat(value *big.Rat, precision int32) Decimal {
+	return Decimal{
+		value: new(big.Int).Set(value.Num()),
+		exp:   0,
+	}.DivRound(Decimal{
+		value: new(big.Int).Set(value.Denom()),
+		exp:   0,
+	}, precision)
+}
+
 // NewFromString returns a new Decimal from a string representation.
 // Trailing zeroes are not trimmed.
 //
 // Example:
 //
-//     d, err := NewFromString("-123.45")
-//     d2, err := NewFromString(".0001")
-//     d3, err := NewFromString("1.47000")
-//
+//	d, err := NewFromString("-123.45")
+//	d2, err := NewFromString(".0001")
+//	d3, err := NewFromString("1.47000")
 func NewFromString(value string) (Decimal, error) {
 	originalInput := value
 	var intString string
@@ -211,15 +254,14 @@ func NewFromString(value string) (Decimal, error) {
 //
 // Example:
 //
-//     r := regexp.MustCompile("[$,]")
-//     d1, err := NewFromFormattedString("$5,125.99", r)
+//	r := regexp.MustCompile("[$,]")
+//	d1, err := NewFromFormattedString("$5,125.99", r)
 //
-//     r2 := regexp.MustCompile("[_]")
-//     d2, err := NewFromFormattedString("1_000_000", r2)
-//
-//     r3 := regexp.MustCompile("[USD\\s]")
-//     d3, err := NewFromFormattedString("5000 USD", r3)
+//	r2 := regexp.MustCompile("[_]")
+//	d2, err := NewFromFormattedString("1_000_000", r2)
 //
+//	r3 := regexp.MustCompile("[USD\\s]")
+//	d3, err := NewFromFormattedString("5000 USD", r3)
 func NewFromFormattedString(value string, replRegexp *regexp.Regexp) (Decimal, error) {
 	parsedValue := replRegexp.ReplaceAllString(value, "")
 	d, err := NewFromString(parsedValue)
@@ -230,13 +272,12 @@ func NewFromFormattedString(value string, replRegexp *regexp.Regexp) (Decimal, e
 }
 
 // RequireFromString returns a new Decimal from a string representation
-// or panics if NewFromString would have returned an error.
+// or panics if NewFromString had returned an error.
 //
 // Example:
 //
-//     d := RequireFromString("-123.45")
-//     d2 := RequireFromString(".0001")
-//
+//	d := RequireFromString("-123.45")
+//	d2 := RequireFromString(".0001")
 func RequireFromString(value string) Decimal {
 	dec, err := NewFromString(value)
 	if err != nil {
@@ -332,8 +373,7 @@ func newFromFloat(val float64, bits uint64, flt *floatInfo) Decimal {
 //
 // Example:
 //
-//     NewFromFloatWithExponent(123.456, -2).String() // output: "123.46"
-//
+//	NewFromFloatWithExponent(123.456, -2).String() // output: "123.46"
 func NewFromFloatWithExponent(value float64, exp int32) Decimal {
 	if math.IsNaN(value) || math.IsInf(value, 0) {
 		panic(fmt.Sprintf("Cannot create a Decimal from %v", value))
@@ -418,7 +458,7 @@ func NewFromFloatWithExponent(value float64, exp int32) Decimal {
 func (d Decimal) Copy() Decimal {
 	d.ensureInitialized()
 	return Decimal{
-		value: &(*d.value),
+		value: new(big.Int).Set(d.value),
 		exp:   d.exp,
 	}
 }
@@ -430,7 +470,7 @@ func (d Decimal) Copy() Decimal {
 //
 // Example:
 //
-// 	d := New(12345, -4)
+//	d := New(12345, -4)
 //	d2 := d.rescale(-1)
 //	d3 := d2.rescale(-4)
 //	println(d1)
@@ -442,7 +482,6 @@ func (d Decimal) Copy() Decimal {
 //	1.2345
 //	1.2
 //	1.2000
-//
 func (d Decimal) rescale(exp int32) Decimal {
 	d.ensureInitialized()
 
@@ -552,11 +591,13 @@ func (d Decimal) Div(d2 Decimal) Decimal {
 	return d.DivRound(d2, int32(DivisionPrecision))
 }
 
-// QuoRem does divsion with remainder
+// QuoRem does division with remainder
 // d.QuoRem(d2,precision) returns quotient q and remainder r such that
-//   d = d2 * q + r, q an integer multiple of 10^(-precision)
-//   0 <= r < abs(d2) * 10 ^(-precision) if d>=0
-//   0 >= r > -abs(d2) * 10 ^(-precision) if d<0
+//
+//	d = d2 * q + r, q an integer multiple of 10^(-precision)
+//	0 <= r < abs(d2) * 10 ^(-precision) if d>=0
+//	0 >= r > -abs(d2) * 10 ^(-precision) if d<0
+//
 // Note that precision<0 is allowed as input.
 func (d Decimal) QuoRem(d2 Decimal, precision int32) (Decimal, Decimal) {
 	d.ensureInitialized()
@@ -565,7 +606,7 @@ func (d Decimal) QuoRem(d2 Decimal, precision int32) (Decimal, Decimal) {
 		panic("decimal division by 0")
 	}
 	scale := -precision
-	e := int64(d.exp - d2.exp - scale)
+	e := int64(d.exp) - int64(d2.exp) - int64(scale)
 	if e > math.MaxInt32 || e < math.MinInt32 {
 		panic("overflow in decimal QuoRem")
 	}
@@ -599,8 +640,10 @@ func (d Decimal) QuoRem(d2 Decimal, precision int32) (Decimal, Decimal) {
 
 // DivRound divides and rounds to a given precision
 // i.e. to an integer multiple of 10^(-precision)
-//   for a positive quotient digit 5 is rounded up, away from 0
-//   if the quotient is negative then digit 5 is rounded down, away from 0
+//
+//	for a positive quotient digit 5 is rounded up, away from 0
+//	if the quotient is negative then digit 5 is rounded down, away from 0
+//
 // Note that precision<0 is allowed as input.
 func (d Decimal) DivRound(d2 Decimal, precision int32) Decimal {
 	// QuoRem already checks initialization
@@ -628,24 +671,278 @@ func (d Decimal) DivRound(d2 Decimal, precision int32) Decimal {
 
 // Mod returns d % d2.
 func (d Decimal) Mod(d2 Decimal) Decimal {
-	quo := d.Div(d2).Truncate(0)
-	return d.Sub(d2.Mul(quo))
+	_, r := d.QuoRem(d2, 0)
+	return r
 }
 
-// Pow returns d to the power d2
+// Pow returns d to the power of d2.
+// When exponent is negative the returned decimal will have maximum precision of PowPrecisionNegativeExponent places after decimal point.
+//
+// Pow returns 0 (zero-value of Decimal) instead of error for power operation edge cases, to handle those edge cases use PowWithPrecision
+// Edge cases not handled by Pow:
+//   - 0 ** 0 => undefined value
+//   - 0 ** y, where y < 0 => infinity
+//   - x ** y, where x < 0 and y is non-integer decimal => imaginary value
+//
+// Example:
+//
+//	d1 := decimal.NewFromFloat(4.0)
+//	d2 := decimal.NewFromFloat(4.0)
+//	res1 := d1.Pow(d2)
+//	res1.String() // output: "256"
+//
+//	d3 := decimal.NewFromFloat(5.0)
+//	d4 := decimal.NewFromFloat(5.73)
+//	res2 := d3.Pow(d4)
+//	res2.String() // output: "10118.08037125"
 func (d Decimal) Pow(d2 Decimal) Decimal {
-	var temp Decimal
-	if d2.IntPart() == 0 {
-		return NewFromFloat(1)
+	baseSign := d.Sign()
+	expSign := d2.Sign()
+
+	if baseSign == 0 {
+		if expSign == 0 {
+			return Decimal{}
+		}
+		if expSign == 1 {
+			return Decimal{zeroInt, 0}
+		}
+		if expSign == -1 {
+			return Decimal{}
+		}
+	}
+
+	if expSign == 0 {
+		return Decimal{oneInt, 0}
+	}
+
+	// TODO: optimize extraction of fractional part
+	one := Decimal{oneInt, 0}
+	expIntPart, expFracPart := d2.QuoRem(one, 0)
+
+	if baseSign == -1 && !expFracPart.IsZero() {
+		return Decimal{}
+	}
+
+	intPartPow, _ := d.PowBigInt(expIntPart.value)
+
+	// if exponent is an integer we don't need to calculate d1**frac(d2)
+	if expFracPart.value.Sign() == 0 {
+		return intPartPow
+	}
+
+	// TODO: optimize NumDigits for more performant precision adjustment
+	digitsBase := d.NumDigits()
+	digitsExponent := d2.NumDigits()
+
+	precision := digitsBase
+
+	if digitsExponent > precision {
+		precision += digitsExponent
+	}
+
+	precision += 6
+
+	// Calculate x ** frac(y), where
+	// x ** frac(y) = exp(ln(x ** frac(y)) = exp(ln(x) * frac(y))
+	fracPartPow, err := d.Abs().Ln(-d.exp + int32(precision))
+	if err != nil {
+		return Decimal{}
+	}
+
+	fracPartPow = fracPartPow.Mul(expFracPart)
+
+	fracPartPow, err = fracPartPow.ExpTaylor(-d.exp + int32(precision))
+	if err != nil {
+		return Decimal{}
+	}
+
+	// Join integer and fractional part,
+	// base ** (expBase + expFrac) = base ** expBase * base ** expFrac
+	res := intPartPow.Mul(fracPartPow)
+
+	return res
+}
+
+// PowWithPrecision returns d to the power of d2.
+// Precision parameter specifies minimum precision of the result (digits after decimal point).
+// Returned decimal is not rounded to 'precision' places after decimal point.
+//
+// PowWithPrecision returns error when:
+//   - 0 ** 0 => undefined value
+//   - 0 ** y, where y < 0 => infinity
+//   - x ** y, where x < 0 and y is non-integer decimal => imaginary value
+//
+// Example:
+//
+//	d1 := decimal.NewFromFloat(4.0)
+//	d2 := decimal.NewFromFloat(4.0)
+//	res1, err := d1.PowWithPrecision(d2, 2)
+//	res1.String() // output: "256"
+//
+//	d3 := decimal.NewFromFloat(5.0)
+//	d4 := decimal.NewFromFloat(5.73)
+//	res2, err := d3.PowWithPrecision(d4, 5)
+//	res2.String() // output: "10118.080371595015625"
+//
+//	d5 := decimal.NewFromFloat(-3.0)
+//	d6 := decimal.NewFromFloat(-6.0)
+//	res3, err := d5.PowWithPrecision(d6, 10)
+//	res3.String() // output: "0.0013717421"
+func (d Decimal) PowWithPrecision(d2 Decimal, precision int32) (Decimal, error) {
+	baseSign := d.Sign()
+	expSign := d2.Sign()
+
+	if baseSign == 0 {
+		if expSign == 0 {
+			return Decimal{}, fmt.Errorf("cannot represent undefined value of 0**0")
+		}
+		if expSign == 1 {
+			return Decimal{zeroInt, 0}, nil
+		}
+		if expSign == -1 {
+			return Decimal{}, fmt.Errorf("cannot represent infinity value of 0 ** y, where y < 0")
+		}
+	}
+
+	if expSign == 0 {
+		return Decimal{oneInt, 0}, nil
+	}
+
+	// TODO: optimize extraction of fractional part
+	one := Decimal{oneInt, 0}
+	expIntPart, expFracPart := d2.QuoRem(one, 0)
+
+	if baseSign == -1 && !expFracPart.IsZero() {
+		return Decimal{}, fmt.Errorf("cannot represent imaginary value of x ** y, where x < 0 and y is non-integer decimal")
+	}
+
+	intPartPow, _ := d.powBigIntWithPrecision(expIntPart.value, precision)
+
+	// if exponent is an integer we don't need to calculate d1**frac(d2)
+	if expFracPart.value.Sign() == 0 {
+		return intPartPow, nil
+	}
+
+	// TODO: optimize NumDigits for more performant precision adjustment
+	digitsBase := d.NumDigits()
+	digitsExponent := d2.NumDigits()
+
+	if int32(digitsBase) > precision {
+		precision = int32(digitsBase)
+	}
+	if int32(digitsExponent) > precision {
+		precision += int32(digitsExponent)
+	}
+	// increase precision by 10 to compensate for errors in further calculations
+	precision += 10
+
+	// Calculate x ** frac(y), where
+	// x ** frac(y) = exp(ln(x ** frac(y)) = exp(ln(x) * frac(y))
+	fracPartPow, err := d.Abs().Ln(precision)
+	if err != nil {
+		return Decimal{}, err
+	}
+
+	fracPartPow = fracPartPow.Mul(expFracPart)
+
+	fracPartPow, err = fracPartPow.ExpTaylor(precision)
+	if err != nil {
+		return Decimal{}, err
+	}
+
+	// Join integer and fractional part,
+	// base ** (expBase + expFrac) = base ** expBase * base ** expFrac
+	res := intPartPow.Mul(fracPartPow)
+
+	return res, nil
+}
+
+// PowInt32 returns d to the power of exp, where exp is int32.
+// Only returns error when d and exp is 0, thus result is undefined.
+//
+// When exponent is negative the returned decimal will have maximum precision of PowPrecisionNegativeExponent places after decimal point.
+//
+// Example:
+//
+//	d1, err := decimal.NewFromFloat(4.0).PowInt32(4)
+//	d1.String() // output: "256"
+//
+//	d2, err := decimal.NewFromFloat(3.13).PowInt32(5)
+//	d2.String() // output: "300.4150512793"
+func (d Decimal) PowInt32(exp int32) (Decimal, error) {
+	if d.IsZero() && exp == 0 {
+		return Decimal{}, fmt.Errorf("cannot represent undefined value of 0**0")
+	}
+
+	isExpNeg := exp < 0
+	exp = abs(exp)
+
+	n, result := d, New(1, 0)
+
+	for exp > 0 {
+		if exp%2 == 1 {
+			result = result.Mul(n)
+		}
+		exp /= 2
+
+		if exp > 0 {
+			n = n.Mul(n)
+		}
+	}
+
+	if isExpNeg {
+		return New(1, 0).DivRound(result, int32(PowPrecisionNegativeExponent)), nil
+	}
+
+	return result, nil
+}
+
+// PowBigInt returns d to the power of exp, where exp is big.Int.
+// Only returns error when d and exp is 0, thus result is undefined.
+//
+// When exponent is negative the returned decimal will have maximum precision of PowPrecisionNegativeExponent places after decimal point.
+//
+// Example:
+//
+//	d1, err := decimal.NewFromFloat(3.0).PowBigInt(big.NewInt(3))
+//	d1.String() // output: "27"
+//
+//	d2, err := decimal.NewFromFloat(629.25).PowBigInt(big.NewInt(5))
+//	d2.String() // output: "98654323103449.5673828125"
+func (d Decimal) PowBigInt(exp *big.Int) (Decimal, error) {
+	return d.powBigIntWithPrecision(exp, int32(PowPrecisionNegativeExponent))
+}
+
+func (d Decimal) powBigIntWithPrecision(exp *big.Int, precision int32) (Decimal, error) {
+	if d.IsZero() && exp.Sign() == 0 {
+		return Decimal{}, fmt.Errorf("cannot represent undefined value of 0**0")
 	}
-	temp = d.Pow(d2.Div(NewFromFloat(2)))
-	if d2.IntPart()%2 == 0 {
-		return temp.Mul(temp)
+
+	tmpExp := new(big.Int).Set(exp)
+	isExpNeg := exp.Sign() < 0
+
+	if isExpNeg {
+		tmpExp.Abs(tmpExp)
+	}
+
+	n, result := d, New(1, 0)
+
+	for tmpExp.Sign() > 0 {
+		if tmpExp.Bit(0) == 1 {
+			result = result.Mul(n)
+		}
+		tmpExp.Rsh(tmpExp, 1)
+
+		if tmpExp.Sign() > 0 {
+			n = n.Mul(n)
+		}
 	}
-	if d2.IntPart() > 0 {
-		return temp.Mul(temp).Mul(d)
+
+	if isExpNeg {
+		return New(1, 0).DivRound(result, precision), nil
 	}
-	return temp.Mul(temp).Div(d)
+
+	return result, nil
 }
 
 // ExpHullAbrham calculates the natural exponent of decimal (e to the power of d) using Hull-Abraham algorithm.
@@ -655,9 +952,8 @@ func (d Decimal) Pow(d2 Decimal) Decimal {
 //
 // Example:
 //
-//     NewFromFloat(26.1).ExpHullAbrham(2).String()    // output: "220000000000"
-//     NewFromFloat(26.1).ExpHullAbrham(20).String()   // output: "216314672147.05767284"
-//
+//	NewFromFloat(26.1).ExpHullAbrham(2).String()    // output: "220000000000"
+//	NewFromFloat(26.1).ExpHullAbrham(20).String()   // output: "216314672147.05767284"
 func (d Decimal) ExpHullAbrham(overallPrecision uint32) (Decimal, error) {
 	// Algorithm based on Variable precision exponential function.
 	// ACM Transactions on Mathematical Software by T. E. Hull & A. Abrham.
@@ -747,15 +1043,14 @@ func (d Decimal) ExpHullAbrham(overallPrecision uint32) (Decimal, error) {
 //
 // Example:
 //
-//     d, err := NewFromFloat(26.1).ExpTaylor(2).String()
-//     d.String()  // output: "216314672147.06"
-//
-//     NewFromFloat(26.1).ExpTaylor(20).String()
-//     d.String()  // output: "216314672147.05767284062928674083"
+//	d, err := NewFromFloat(26.1).ExpTaylor(2).String()
+//	d.String()  // output: "216314672147.06"
 //
-//     NewFromFloat(26.1).ExpTaylor(-10).String()
-//     d.String()  // output: "220000000000"
+//	NewFromFloat(26.1).ExpTaylor(20).String()
+//	d.String()  // output: "216314672147.05767284062928674083"
 //
+//	NewFromFloat(26.1).ExpTaylor(-10).String()
+//	d.String()  // output: "220000000000"
 func (d Decimal) ExpTaylor(precision int32) (Decimal, error) {
 	// Note(mwoss): Implementation can be optimized by exclusively using big.Int API only
 	if d.IsZero() {
@@ -812,14 +1107,162 @@ func (d Decimal) ExpTaylor(precision int32) (Decimal, error) {
 	return result, nil
 }
 
+// Ln calculates natural logarithm of d.
+// Precision argument specifies how precise the result must be (number of digits after decimal point).
+// Negative precision is allowed.
+//
+// Example:
+//
+//	d1, err := NewFromFloat(13.3).Ln(2)
+//	d1.String()  // output: "2.59"
+//
+//	d2, err := NewFromFloat(579.161).Ln(10)
+//	d2.String()  // output: "6.3615805046"
+func (d Decimal) Ln(precision int32) (Decimal, error) {
+	// Algorithm based on The Use of Iteration Methods for Approximating the Natural Logarithm,
+	// James F. Epperson, The American Mathematical Monthly, Vol. 96, No. 9, November 1989, pp. 831-835.
+	if d.IsNegative() {
+		return Decimal{}, fmt.Errorf("cannot calculate natural logarithm for negative decimals")
+	}
+
+	if d.IsZero() {
+		return Decimal{}, fmt.Errorf("cannot represent natural logarithm of 0, result: -infinity")
+	}
+
+	calcPrecision := precision + 2
+	z := d.Copy()
+
+	var comp1, comp3, comp2, comp4, reduceAdjust Decimal
+	comp1 = z.Sub(Decimal{oneInt, 0})
+	comp3 = Decimal{oneInt, -1}
+
+	// for decimal in range [0.9, 1.1] where ln(d) is close to 0
+	usePowerSeries := false
+
+	if comp1.Abs().Cmp(comp3) <= 0 {
+		usePowerSeries = true
+	} else {
+		// reduce input decimal to range [0.1, 1)
+		expDelta := int32(z.NumDigits()) + z.exp
+		z.exp -= expDelta
+
+		// Input decimal was reduced by factor of 10^expDelta, thus we will need to add
+		// ln(10^expDelta) = expDelta * ln(10)
+		// to the result to compensate that
+		ln10 := ln10.withPrecision(calcPrecision)
+		reduceAdjust = NewFromInt32(expDelta)
+		reduceAdjust = reduceAdjust.Mul(ln10)
+
+		comp1 = z.Sub(Decimal{oneInt, 0})
+
+		if comp1.Abs().Cmp(comp3) <= 0 {
+			usePowerSeries = true
+		} else {
+			// initial estimate using floats
+			zFloat := z.InexactFloat64()
+			comp1 = NewFromFloat(math.Log(zFloat))
+		}
+	}
+
+	epsilon := Decimal{oneInt, -calcPrecision}
+
+	if usePowerSeries {
+		// Power Series - https://en.wikipedia.org/wiki/Logarithm#Power_series
+		// Calculating n-th term of formula: ln(z+1) = 2 sum [ 1 / (2n+1) * (z / (z+2))^(2n+1) ]
+		// until the difference between current and next term is smaller than epsilon.
+		// Coverage quite fast for decimals close to 1.0
+
+		// z + 2
+		comp2 = comp1.Add(Decimal{twoInt, 0})
+		// z / (z + 2)
+		comp3 = comp1.DivRound(comp2, calcPrecision)
+		// 2 * (z / (z + 2))
+		comp1 = comp3.Add(comp3)
+		comp2 = comp1.Copy()
+
+		for n := 1; ; n++ {
+			// 2 * (z / (z+2))^(2n+1)
+			comp2 = comp2.Mul(comp3).Mul(comp3)
+
+			// 1 / (2n+1) * 2 * (z / (z+2))^(2n+1)
+			comp4 = NewFromInt(int64(2*n + 1))
+			comp4 = comp2.DivRound(comp4, calcPrecision)
+
+			// comp1 = 2 sum [ 1 / (2n+1) * (z / (z+2))^(2n+1) ]
+			comp1 = comp1.Add(comp4)
+
+			if comp4.Abs().Cmp(epsilon) <= 0 {
+				break
+			}
+		}
+	} else {
+		// Halley's Iteration.
+		// Calculating n-th term of formula: a_(n+1) = a_n - 2 * (exp(a_n) - z) / (exp(a_n) + z),
+		// until the difference between current and next term is smaller than epsilon
+		var prevStep Decimal
+		maxIters := calcPrecision*2 + 10
+
+		for i := int32(0); i < maxIters; i++ {
+			// exp(a_n)
+			comp3, _ = comp1.ExpTaylor(calcPrecision)
+			// exp(a_n) - z
+			comp2 = comp3.Sub(z)
+			// 2 * (exp(a_n) - z)
+			comp2 = comp2.Add(comp2)
+			// exp(a_n) + z
+			comp4 = comp3.Add(z)
+			// 2 * (exp(a_n) - z) / (exp(a_n) + z)
+			comp3 = comp2.DivRound(comp4, calcPrecision)
+			// comp1 = a_(n+1) = a_n - 2 * (exp(a_n) - z) / (exp(a_n) + z)
+			comp1 = comp1.Sub(comp3)
+
+			if prevStep.Add(comp3).IsZero() {
+				// If iteration steps oscillate we should return early and prevent an infinity loop
+				// NOTE(mwoss): This should be quite a rare case, returning error is not necessary
+				break
+			}
+
+			if comp3.Abs().Cmp(epsilon) <= 0 {
+				break
+			}
+
+			prevStep = comp3
+		}
+	}
+
+	comp1 = comp1.Add(reduceAdjust)
+
+	return comp1.Round(precision), nil
+}
+
 // NumDigits returns the number of digits of the decimal coefficient (d.Value)
-// Note: Current implementation is extremely slow for large decimals and/or decimals with large fractional part
 func (d Decimal) NumDigits() int {
-	// Note(mwoss): It can be optimized, unnecessary cast of big.Int to string
-	if d.IsNegative() {
-		return len(d.value.String()) - 1
+	if d.value == nil {
+		return 1
+	}
+
+	if d.value.IsInt64() {
+		i64 := d.value.Int64()
+		// restrict fast path to integers with exact conversion to float64
+		if i64 <= (1<<53) && i64 >= -(1<<53) {
+			if i64 == 0 {
+				return 1
+			}
+			return int(math.Log10(math.Abs(float64(i64)))) + 1
+		}
+	}
+
+	estimatedNumDigits := int(float64(d.value.BitLen()) / math.Log2(10))
+
+	// estimatedNumDigits (lg10) may be off by 1, need to verify
+	digitsBigInt := big.NewInt(int64(estimatedNumDigits))
+	errorCorrectionUnit := digitsBigInt.Exp(tenInt, digitsBigInt, nil)
+
+	if d.value.CmpAbs(errorCorrectionUnit) >= 0 {
+		return estimatedNumDigits + 1
 	}
-	return len(d.value.String())
+
+	return estimatedNumDigits
 }
 
 // IsInteger returns true when decimal can be represented as an integer value, otherwise, it returns false.
@@ -851,10 +1294,9 @@ func abs(n int32) int32 {
 
 // Cmp compares the numbers represented by d and d2 and returns:
 //
-//     -1 if d <  d2
-//      0 if d == d2
-//     +1 if d >  d2
-//
+//	-1 if d <  d2
+//	 0 if d == d2
+//	+1 if d >  d2
 func (d Decimal) Cmp(d2 Decimal) int {
 	d.ensureInitialized()
 	d2.ensureInitialized()
@@ -868,12 +1310,21 @@ func (d Decimal) Cmp(d2 Decimal) int {
 	return rd.value.Cmp(rd2.value)
 }
 
+// Compare compares the numbers represented by d and d2 and returns:
+//
+//	-1 if d <  d2
+//	 0 if d == d2
+//	+1 if d >  d2
+func (d Decimal) Compare(d2 Decimal) int {
+	return d.Cmp(d2)
+}
+
 // Equal returns whether the numbers represented by d and d2 are equal.
 func (d Decimal) Equal(d2 Decimal) bool {
 	return d.Cmp(d2) == 0
 }
 
-// Equals is deprecated, please use Equal method instead
+// Deprecated: Equals is deprecated, please use Equal method instead.
 func (d Decimal) Equals(d2 Decimal) bool {
 	return d.Equal(d2)
 }
@@ -905,7 +1356,6 @@ func (d Decimal) LessThanOrEqual(d2 Decimal) bool {
 //	-1 if d <  0
 //	 0 if d == 0
 //	+1 if d >  0
-//
 func (d Decimal) Sign() int {
 	if d.value == nil {
 		return 0
@@ -968,9 +1418,7 @@ func (d Decimal) IntPart() int64 {
 // BigInt returns integer component of the decimal as a BigInt.
 func (d Decimal) BigInt() *big.Int {
 	scaledD := d.rescale(0)
-	i := &big.Int{}
-	i.SetString(scaledD.String(), 10)
-	return i
+	return scaledD.value
 }
 
 // BigFloat returns decimal as BigFloat.
@@ -1014,13 +1462,12 @@ func (d Decimal) InexactFloat64() float64 {
 //
 // Example:
 //
-//     d := New(-12345, -3)
-//     println(d.String())
+//	d := New(-12345, -3)
+//	println(d.String())
 //
 // Output:
 //
-//     -12.345
-//
+//	-12.345
 func (d Decimal) String() string {
 	return d.string(true)
 }
@@ -1030,14 +1477,13 @@ func (d Decimal) String() string {
 //
 // Example:
 //
-// 	   NewFromFloat(0).StringFixed(2) // output: "0.00"
-// 	   NewFromFloat(0).StringFixed(0) // output: "0"
-// 	   NewFromFloat(5.45).StringFixed(0) // output: "5"
-// 	   NewFromFloat(5.45).StringFixed(1) // output: "5.5"
-// 	   NewFromFloat(5.45).StringFixed(2) // output: "5.45"
-// 	   NewFromFloat(5.45).StringFixed(3) // output: "5.450"
-// 	   NewFromFloat(545).StringFixed(-1) // output: "550"
-//
+//	NewFromFloat(0).StringFixed(2) // output: "0.00"
+//	NewFromFloat(0).StringFixed(0) // output: "0"
+//	NewFromFloat(5.45).StringFixed(0) // output: "5"
+//	NewFromFloat(5.45).StringFixed(1) // output: "5.5"
+//	NewFromFloat(5.45).StringFixed(2) // output: "5.45"
+//	NewFromFloat(5.45).StringFixed(3) // output: "5.450"
+//	NewFromFloat(545).StringFixed(-1) // output: "550"
 func (d Decimal) StringFixed(places int32) string {
 	rounded := d.Round(places)
 	return rounded.string(false)
@@ -1048,14 +1494,13 @@ func (d Decimal) StringFixed(places int32) string {
 //
 // Example:
 //
-// 	   NewFromFloat(0).StringFixedBank(2) // output: "0.00"
-// 	   NewFromFloat(0).StringFixedBank(0) // output: "0"
-// 	   NewFromFloat(5.45).StringFixedBank(0) // output: "5"
-// 	   NewFromFloat(5.45).StringFixedBank(1) // output: "5.4"
-// 	   NewFromFloat(5.45).StringFixedBank(2) // output: "5.45"
-// 	   NewFromFloat(5.45).StringFixedBank(3) // output: "5.450"
-// 	   NewFromFloat(545).StringFixedBank(-1) // output: "540"
-//
+//	NewFromFloat(0).StringFixedBank(2) // output: "0.00"
+//	NewFromFloat(0).StringFixedBank(0) // output: "0"
+//	NewFromFloat(5.45).StringFixedBank(0) // output: "5"
+//	NewFromFloat(5.45).StringFixedBank(1) // output: "5.4"
+//	NewFromFloat(5.45).StringFixedBank(2) // output: "5.45"
+//	NewFromFloat(5.45).StringFixedBank(3) // output: "5.450"
+//	NewFromFloat(545).StringFixedBank(-1) // output: "540"
 func (d Decimal) StringFixedBank(places int32) string {
 	rounded := d.RoundBank(places)
 	return rounded.string(false)
@@ -1073,9 +1518,8 @@ func (d Decimal) StringFixedCash(interval uint8) string {
 //
 // Example:
 //
-// 	   NewFromFloat(5.45).Round(1).String() // output: "5.5"
-// 	   NewFromFloat(545).Round(-1).String() // output: "550"
-//
+//	NewFromFloat(5.45).Round(1).String() // output: "5.5"
+//	NewFromFloat(545).Round(-1).String() // output: "550"
 func (d Decimal) Round(places int32) Decimal {
 	if d.exp == -places {
 		return d
@@ -1104,11 +1548,10 @@ func (d Decimal) Round(places int32) Decimal {
 //
 // Example:
 //
-//     NewFromFloat(545).RoundCeil(-2).String()   // output: "600"
-//     NewFromFloat(500).RoundCeil(-2).String()   // output: "500"
-//     NewFromFloat(1.1001).RoundCeil(2).String() // output: "1.11"
-//     NewFromFloat(-1.454).RoundCeil(1).String() // output: "-1.5"
-//
+//	NewFromFloat(545).RoundCeil(-2).String()   // output: "600"
+//	NewFromFloat(500).RoundCeil(-2).String()   // output: "500"
+//	NewFromFloat(1.1001).RoundCeil(2).String() // output: "1.11"
+//	NewFromFloat(-1.454).RoundCeil(1).String() // output: "-1.4"
 func (d Decimal) RoundCeil(places int32) Decimal {
 	if d.exp >= -places {
 		return d
@@ -1130,11 +1573,10 @@ func (d Decimal) RoundCeil(places int32) Decimal {
 //
 // Example:
 //
-//     NewFromFloat(545).RoundFloor(-2).String()   // output: "500"
-//     NewFromFloat(-500).RoundFloor(-2).String()   // output: "-500"
-//     NewFromFloat(1.1001).RoundFloor(2).String() // output: "1.1"
-//     NewFromFloat(-1.454).RoundFloor(1).String() // output: "-1.4"
-//
+//	NewFromFloat(545).RoundFloor(-2).String()   // output: "500"
+//	NewFromFloat(-500).RoundFloor(-2).String()   // output: "-500"
+//	NewFromFloat(1.1001).RoundFloor(2).String() // output: "1.1"
+//	NewFromFloat(-1.454).RoundFloor(1).String() // output: "-1.5"
 func (d Decimal) RoundFloor(places int32) Decimal {
 	if d.exp >= -places {
 		return d
@@ -1156,11 +1598,10 @@ func (d Decimal) RoundFloor(places int32) Decimal {
 //
 // Example:
 //
-//     NewFromFloat(545).RoundUp(-2).String()   // output: "600"
-//     NewFromFloat(500).RoundUp(-2).String()   // output: "500"
-//     NewFromFloat(1.1001).RoundUp(2).String() // output: "1.11"
-//     NewFromFloat(-1.454).RoundUp(1).String() // output: "-1.4"
-//
+//	NewFromFloat(545).RoundUp(-2).String()   // output: "600"
+//	NewFromFloat(500).RoundUp(-2).String()   // output: "500"
+//	NewFromFloat(1.1001).RoundUp(2).String() // output: "1.11"
+//	NewFromFloat(-1.454).RoundUp(1).String() // output: "-1.5"
 func (d Decimal) RoundUp(places int32) Decimal {
 	if d.exp >= -places {
 		return d
@@ -1184,11 +1625,10 @@ func (d Decimal) RoundUp(places int32) Decimal {
 //
 // Example:
 //
-//     NewFromFloat(545).RoundDown(-2).String()   // output: "500"
-//     NewFromFloat(-500).RoundDown(-2).String()   // output: "-500"
-//     NewFromFloat(1.1001).RoundDown(2).String() // output: "1.1"
-//     NewFromFloat(-1.454).RoundDown(1).String() // output: "-1.5"
-//
+//	NewFromFloat(545).RoundDown(-2).String()   // output: "500"
+//	NewFromFloat(-500).RoundDown(-2).String()   // output: "-500"
+//	NewFromFloat(1.1001).RoundDown(2).String() // output: "1.1"
+//	NewFromFloat(-1.454).RoundDown(1).String() // output: "-1.4"
 func (d Decimal) RoundDown(places int32) Decimal {
 	if d.exp >= -places {
 		return d
@@ -1209,13 +1649,12 @@ func (d Decimal) RoundDown(places int32) Decimal {
 //
 // Examples:
 //
-// 	   NewFromFloat(5.45).RoundBank(1).String() // output: "5.4"
-// 	   NewFromFloat(545).RoundBank(-1).String() // output: "540"
-// 	   NewFromFloat(5.46).RoundBank(1).String() // output: "5.5"
-// 	   NewFromFloat(546).RoundBank(-1).String() // output: "550"
-// 	   NewFromFloat(5.55).RoundBank(1).String() // output: "5.6"
-// 	   NewFromFloat(555).RoundBank(-1).String() // output: "560"
-//
+//	NewFromFloat(5.45).RoundBank(1).String() // output: "5.4"
+//	NewFromFloat(545).RoundBank(-1).String() // output: "540"
+//	NewFromFloat(5.46).RoundBank(1).String() // output: "5.5"
+//	NewFromFloat(546).RoundBank(-1).String() // output: "550"
+//	NewFromFloat(5.55).RoundBank(1).String() // output: "5.6"
+//	NewFromFloat(555).RoundBank(-1).String() // output: "560"
 func (d Decimal) RoundBank(places int32) Decimal {
 
 	round := d.Round(places)
@@ -1237,11 +1676,13 @@ func (d Decimal) RoundBank(places int32) Decimal {
 // interval. The amount payable for a cash transaction is rounded to the nearest
 // multiple of the minimum currency unit available. The following intervals are
 // available: 5, 10, 25, 50 and 100; any other number throws a panic.
-//	    5:   5 cent rounding 3.43 => 3.45
-// 	   10:  10 cent rounding 3.45 => 3.50 (5 gets rounded up)
-// 	   25:  25 cent rounding 3.41 => 3.50
-// 	   50:  50 cent rounding 3.75 => 4.00
-// 	  100: 100 cent rounding 3.50 => 4.00
+//
+//	  5:   5 cent rounding 3.43 => 3.45
+//	 10:  10 cent rounding 3.45 => 3.50 (5 gets rounded up)
+//	 25:  25 cent rounding 3.41 => 3.50
+//	 50:  50 cent rounding 3.75 => 4.00
+//	100: 100 cent rounding 3.50 => 4.00
+//
 // For more details: https://en.wikipedia.org/wiki/Cash_rounding
 func (d Decimal) RoundCash(interval uint8) Decimal {
 	var iVal *big.Int
@@ -1310,8 +1751,7 @@ func (d Decimal) Ceil() Decimal {
 //
 // Example:
 //
-//     decimal.NewFromString("123.456").Truncate(2).String() // "123.45"
-//
+//	decimal.NewFromString("123.456").Truncate(2).String() // "123.45"
 func (d Decimal) Truncate(precision int32) Decimal {
 	d.ensureInitialized()
 	if precision >= 0 && -precision > d.exp {
@@ -1373,19 +1813,18 @@ func (d *Decimal) UnmarshalBinary(data []byte) error {
 
 // MarshalBinary implements the encoding.BinaryMarshaler interface.
 func (d Decimal) MarshalBinary() (data []byte, err error) {
-	// Write the exponent first since it's a fixed size
-	v1 := make([]byte, 4)
-	binary.BigEndian.PutUint32(v1, uint32(d.exp))
-
-	// Add the value
-	var v2 []byte
-	if v2, err = d.value.GobEncode(); err != nil {
-		return
+	// exp is written first, but encode value first to know output size
+	var valueData []byte
+	if valueData, err = d.value.GobEncode(); err != nil {
+		return nil, err
 	}
 
+	// Write the exponent in front, since it's a fixed size
+	expData := make([]byte, 4, len(valueData)+4)
+	binary.BigEndian.PutUint32(expData, uint32(d.exp))
+
 	// Return the byte array
-	data = append(v1, v2...)
-	return
+	return append(expData, valueData...), nil
 }
 
 // Scan implements the sql.Scanner interface for database deserialization.
@@ -1408,6 +1847,11 @@ func (d *Decimal) Scan(value interface{}) error {
 		*d = New(v, 0)
 		return nil
 
+	case uint64:
+		// while clickhouse may send 0 in db as uint64
+		*d = NewFromUint64(v)
+		return nil
+
 	default:
 		// default is trying to interpret value stored as string
 		str, err := unquoteIfQuoted(v)
@@ -1455,7 +1899,8 @@ func (d *Decimal) GobDecode(data []byte) error {
 }
 
 // StringScaled first scales the decimal then calls .String() on it.
-// NOTE: buggy, unintuitive, and DEPRECATED! Use StringFixed instead.
+//
+// Deprecated: buggy and unintuitive. Use StringFixed instead.
 func (d Decimal) StringScaled(exp int32) string {
 	return d.rescale(exp).String()
 }
@@ -1515,7 +1960,7 @@ func (d *Decimal) ensureInitialized() {
 //
 // To call this function with an array, you must do:
 //
-//     Min(arr[0], arr[1:]...)
+//	Min(arr[0], arr[1:]...)
 //
 // This makes it harder to accidentally call Min with 0 arguments.
 func Min(first Decimal, rest ...Decimal) Decimal {
@@ -1532,7 +1977,7 @@ func Min(first Decimal, rest ...Decimal) Decimal {
 //
 // To call this function with an array, you must do:
 //
-//     Max(arr[0], arr[1:]...)
+//	Max(arr[0], arr[1:]...)
 //
 // This makes it harder to accidentally call Max with 0 arguments.
 func Max(first Decimal, rest ...Decimal) Decimal {
@@ -1567,22 +2012,13 @@ func RescalePair(d1 Decimal, d2 Decimal) (Decimal, Decimal) {
 	d1.ensureInitialized()
 	d2.ensureInitialized()
 
-	if d1.exp == d2.exp {
-		return d1, d2
+	if d1.exp < d2.exp {
+		return d1, d2.rescale(d1.exp)
+	} else if d1.exp > d2.exp {
+		return d1.rescale(d2.exp), d2
 	}
 
-	baseScale := min(d1.exp, d2.exp)
-	if baseScale != d1.exp {
-		return d1.rescale(baseScale), d2
-	}
-	return d1, d2.rescale(baseScale)
-}
-
-func min(x, y int32) int32 {
-	if x >= y {
-		return y
-	}
-	return x
+	return d1, d2
 }
 
 func unquoteIfQuoted(value interface{}) (string, error) {
@@ -1594,8 +2030,7 @@ func unquoteIfQuoted(value interface{}) (string, error) {
 	case []byte:
 		bytes = v
 	default:
-		return "", fmt.Errorf("could not convert value '%+v' to byte array of type '%T'",
-			value, value)
+		return "", fmt.Errorf("could not convert value '%+v' to byte array of type '%T'", value, value)
 	}
 
 	// If the amount is quoted, strip the quotes