diff --git a/README.md b/README.md
index 7b3ab46..7bc80b4 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 Package validator
 ================
 <img align="right" src="https://raw.githubusercontent.com/go-playground/validator/v9/logo.png">[![Join the chat at https://gitter.im/go-playground/validator](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/go-playground/validator?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-![Project status](https://img.shields.io/badge/version-9.14.0-green.svg)
+![Project status](https://img.shields.io/badge/version-9.15.0-green.svg)
 [![Build Status](https://semaphoreci.com/api/v1/joeybloggs/validator/branches/v9/badge.svg)](https://semaphoreci.com/joeybloggs/validator)
 [![Coverage Status](https://coveralls.io/repos/go-playground/validator/badge.svg?branch=v9&service=github)](https://coveralls.io/github/go-playground/validator?branch=v9)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-playground/validator)](https://goreportcard.com/report/github.com/go-playground/validator)
diff --git a/baked_in.go b/baked_in.go
index 66ecc61..3c83b73 100644
--- a/baked_in.go
+++ b/baked_in.go
@@ -11,6 +11,8 @@ import (
 	"sync"
 	"time"
 	"unicode/utf8"
+	"crypto/sha256"
+	"bytes"
 )
 
 // Func accepts a FieldLevel interface for all validation needs. The return
@@ -106,6 +108,9 @@ var (
 		"isbn":             isISBN,
 		"isbn10":           isISBN10,
 		"isbn13":           isISBN13,
+		"eth_addr":         isEthereumAddress,
+		"btc_addr":         isBitcoinAddress,
+		"btc_addr_bech32":  isBitcoinBech32Address,
 		"uuid":             isUUID,
 		"uuid3":            isUUID3,
 		"uuid4":            isUUID4,
@@ -388,6 +393,139 @@ func isISBN10(fl FieldLevel) bool {
 	return checksum%11 == 0
 }
 
+// IsEthereumAddress is the validation function for validating if the field's value is a valid ethereum address based currently only on the format
+func isEthereumAddress(fl FieldLevel) bool {
+	address := fl.Field().String()
+
+	if !ethAddressRegex.MatchString(address) {
+		return false
+	}
+
+	if ethaddressRegexUpper.MatchString(address) || ethAddressRegexLower.MatchString(address) {
+		return true
+	}
+
+	// checksum validation is blocked by https://github.com/golang/crypto/pull/28
+
+	return true
+}
+
+// IsBitcoinAddress is the validation function for validating if the field's value is a valid btc address
+func isBitcoinAddress(fl FieldLevel) bool {
+	address := fl.Field().String()
+
+	if !btcAddressRegex.MatchString(address) {
+		return false
+	}
+
+	alphabet := []byte("123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz")
+
+	decode := [25]byte{}
+
+	for _, n := range []byte(address) {
+		d := bytes.IndexByte(alphabet, n)
+
+		for i := 24; i >= 0; i-- {
+			d += 58 * int(decode[i])
+			decode[i] = byte(d % 256)
+			d /= 256
+		}
+	}
+
+	h := sha256.New()
+	h.Write(decode[:21])
+	d := h.Sum([]byte{})
+	h = sha256.New()
+	h.Write(d)
+
+	validchecksum := [4]byte{}
+	computedchecksum := [4]byte{}
+
+	copy(computedchecksum[:], h.Sum(d[:0]))
+	copy(validchecksum[:], decode[21:])
+
+	return validchecksum == computedchecksum
+}
+
+// IsBitcoinBech32Address is the validation function for validating if the field's value is a valid bech32 btc address
+func isBitcoinBech32Address(fl FieldLevel) bool {
+	address := fl.Field().String()
+
+	if !btcLowerAddressRegexBech32.MatchString(address) && !btcUpperAddressRegexBech32.MatchString(address){
+		return false
+	}
+
+	am := len(address) % 8
+
+	if am == 0 || am == 3 || am == 5{
+		return false
+	}
+
+	address = strings.ToLower(address)
+
+	alphabet := "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+
+	hr := []int{3, 3, 0, 2, 3} // the human readable part will always be bc
+	dp := []int{}
+
+	for _, c := range []rune(address[3:]) {
+		dp = append(dp, strings.IndexRune(alphabet, c))
+	}
+
+	ver := dp[0]
+
+	if ver < 0 || ver > 16{
+		return false
+	}
+
+	if ver == 0 {
+		if len(address) != 42 && len(address) != 62 {
+			return false
+		}
+	}
+
+	values := append(hr, dp...)
+
+	GEN := []int{ 0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3 }
+
+	p := 1
+
+	for _, v := range values {
+		b := p >> 25
+		p = (p & 0x1ffffff) << 5 ^ v
+
+		for i := 0; i < 5; i++ {
+			if (b >> uint(i)) & 1 == 1 {
+				p ^= GEN[i]
+			}
+		}
+	}
+
+	if p != 1 {
+		return false
+	}
+
+	b := uint(0)
+	acc := 0
+	mv := (1 << 5) - 1
+	sw := []int{}
+
+	for _, v := range dp[1:len(dp) - 6]{
+		acc = (acc << 5) | v
+		b += 5
+		for b >= 8{
+			b -= 8
+			sw = append(sw, (acc>>b)&mv)
+		}
+	}
+
+	if len(sw) < 2 || len(sw) > 40{
+		return false
+	}
+
+	return true
+}
+
 // ExcludesRune is the validation function for validating that the field's value does not contain the rune specified within the param.
 func excludesRune(fl FieldLevel) bool {
 	return !containsRune(fl)
diff --git a/doc.go b/doc.go
index 14b78e2..e8ef618 100644
--- a/doc.go
+++ b/doc.go
@@ -611,7 +611,7 @@ this with the omitempty tag.
 
 Base64URL String
 
-This validates that a string value contains a valid base64 URL safe value 
+This validates that a string value contains a valid base64 URL safe value
 according the the RFC4648 spec.
 Although an empty string is a valid base64 URL safe value, this will report
 an empty string as an error, if you wish to accept an empty string as valid
@@ -619,6 +619,30 @@ you can use this with the omitempty tag.
 
 	Usage: base64url
 
+Bitcoin Address
+
+This validates that a string value contains a valid bitcoin address.
+The format of the string is checked to ensure it matches one of the three formats
+P2PKH, P2SH and performs checksum validation.
+
+	Usage: btc_addr
+
+Bitcoin Bech32 Address (segwit)
+
+This validates that a string value contains a valid bitcoin Bech32 address as defined
+by bip-0173 (https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki)
+Special thanks to Pieter Wuille for providng reference implementations.
+
+	Usage: btc_addr_bech32
+
+Ethereum Address
+
+This validates that a string value contains a valid ethereum address.
+The format of the string is checked to ensure it matches the standard Ethereum address format
+Full validation is blocked by https://github.com/golang/crypto/pull/28
+
+	Usage: eth_addr
+
 Contains
 
 This validates that a string value contains the substring value.
@@ -675,7 +699,6 @@ This validates that a string value contains a valid isbn13 value.
 
 	Usage: isbn13
 
-
 Universally Unique Identifier UUID
 
 This validates that a string value contains a valid UUID.
diff --git a/regexes.go b/regexes.go
index 5dee75f..85e1f0a 100644
--- a/regexes.go
+++ b/regexes.go
@@ -3,67 +3,79 @@ package validator
 import "regexp"
 
 const (
-	alphaRegexString               = "^[a-zA-Z]+$"
-	alphaNumericRegexString        = "^[a-zA-Z0-9]+$"
-	alphaUnicodeRegexString        = "^[\\p{L}]+$"
-	alphaUnicodeNumericRegexString = "^[\\p{L}\\p{N}]+$"
-	numericRegexString             = "^[-+]?[0-9]+(?:\\.[0-9]+)?$"
-	numberRegexString              = "^[0-9]+$"
-	hexadecimalRegexString         = "^[0-9a-fA-F]+$"
-	hexcolorRegexString            = "^#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$"
-	rgbRegexString                 = "^rgb\\(\\s*(?:(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])|(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%)\\s*\\)$"
-	rgbaRegexString                = "^rgba\\(\\s*(?:(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])|(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%)\\s*,\\s*(?:(?:0.[1-9]*)|[01])\\s*\\)$"
-	hslRegexString                 = "^hsl\\(\\s*(?:0|[1-9]\\d?|[12]\\d\\d|3[0-5]\\d|360)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*\\)$"
-	hslaRegexString                = "^hsla\\(\\s*(?:0|[1-9]\\d?|[12]\\d\\d|3[0-5]\\d|360)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*,\\s*(?:(?:0.[1-9]*)|[01])\\s*\\)$"
-	emailRegexString               = "^(?:(?:(?:(?:[a-zA-Z]|\\d|[!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])+(?:\\.([a-zA-Z]|\\d|[!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])+)*)|(?:(?:\\x22)(?:(?:(?:(?:\\x20|\\x09)*(?:\\x0d\\x0a))?(?:\\x20|\\x09)+)?(?:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x7f]|\\x21|[\\x23-\\x5b]|[\\x5d-\\x7e]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(?:\\(?:[\\x01-\\x09\\x0b\\x0c\\x0d-\\x7f]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}]))))*(?:(?:(?:\\x20|\\x09)*(?:\\x0d\\x0a))?(\\x20|\\x09)+)?(?:\\x22)))@(?:(?:(?:[a-zA-Z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(?:(?:[a-zA-Z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])(?:[a-zA-Z]|\\d|-|\\.|_|~|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])*(?:[a-zA-Z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])))\\.)+(?:(?:[a-zA-Z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(?:(?:[a-zA-Z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])(?:[a-zA-Z]|\\d|-|\\.|_|~|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])*(?:[a-zA-Z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])))\\.?$"
-	base64RegexString              = "^(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\\/]{3}=|[A-Za-z0-9+\\/]{4})$"
-	base64URLRegexString           = "^(?:[A-Za-z0-9-_]{4})*(?:[A-Za-z0-9-_]{2}==|[A-Za-z0-9-_]{3}=|[A-Za-z0-9-_]{4})$"
-	iSBN10RegexString              = "^(?:[0-9]{9}X|[0-9]{10})$"
-	iSBN13RegexString              = "^(?:(?:97(?:8|9))[0-9]{10})$"
-	uUID3RegexString               = "^[0-9a-f]{8}-[0-9a-f]{4}-3[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$"
-	uUID4RegexString               = "^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
-	uUID5RegexString               = "^[0-9a-f]{8}-[0-9a-f]{4}-5[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
-	uUIDRegexString                = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$"
-	aSCIIRegexString               = "^[\x00-\x7F]*$"
-	printableASCIIRegexString      = "^[\x20-\x7E]*$"
-	multibyteRegexString           = "[^\x00-\x7F]"
-	dataURIRegexString             = "^data:.+\\/(.+);base64$"
-	latitudeRegexString            = "^[-+]?([1-8]?\\d(\\.\\d+)?|90(\\.0+)?)$"
-	longitudeRegexString           = "^[-+]?(180(\\.0+)?|((1[0-7]\\d)|([1-9]?\\d))(\\.\\d+)?)$"
-	sSNRegexString                 = `^\d{3}[- ]?\d{2}[- ]?\d{4}$`
-	hostnameRegexStringRFC952      = `^[a-zA-Z][a-zA-Z0-9\-\.]+[a-z-Az0-9]$`    // https://tools.ietf.org/html/rfc952
-	hostnameRegexStringRFC1123     = `^[a-zA-Z0-9][a-zA-Z0-9\-\.]+[a-z-Az0-9]$` // accepts hostname starting with a digit https://tools.ietf.org/html/rfc1123
+	alphaRegexString                 = "^[a-zA-Z]+$"
+	alphaNumericRegexString          = "^[a-zA-Z0-9]+$"
+	alphaUnicodeRegexString          = "^[\\p{L}]+$"
+	alphaUnicodeNumericRegexString   = "^[\\p{L}\\p{N}]+$"
+	numericRegexString               = "^[-+]?[0-9]+(?:\\.[0-9]+)?$"
+	numberRegexString                = "^[0-9]+$"
+	hexadecimalRegexString           = "^[0-9a-fA-F]+$"
+	hexcolorRegexString              = "^#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$"
+	rgbRegexString                   = "^rgb\\(\\s*(?:(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])|(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%)\\s*\\)$"
+	rgbaRegexString                  = "^rgba\\(\\s*(?:(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])|(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%\\s*,\\s*(?:0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])%)\\s*,\\s*(?:(?:0.[1-9]*)|[01])\\s*\\)$"
+	hslRegexString                   = "^hsl\\(\\s*(?:0|[1-9]\\d?|[12]\\d\\d|3[0-5]\\d|360)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*\\)$"
+	hslaRegexString                  = "^hsla\\(\\s*(?:0|[1-9]\\d?|[12]\\d\\d|3[0-5]\\d|360)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*,\\s*(?:(?:0|[1-9]\\d?|100)%)\\s*,\\s*(?:(?:0.[1-9]*)|[01])\\s*\\)$"
+	emailRegexString                 = "^(?:(?:(?:(?:[a-zA-Z]|\\d|[!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])+(?:\\.([a-zA-Z]|\\d|[!#\\$%&'\\*\\+\\-\\/=\\?\\^_`{\\|}~]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])+)*)|(?:(?:\\x22)(?:(?:(?:(?:\\x20|\\x09)*(?:\\x0d\\x0a))?(?:\\x20|\\x09)+)?(?:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x7f]|\\x21|[\\x23-\\x5b]|[\\x5d-\\x7e]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(?:\\(?:[\\x01-\\x09\\x0b\\x0c\\x0d-\\x7f]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}]))))*(?:(?:(?:\\x20|\\x09)*(?:\\x0d\\x0a))?(\\x20|\\x09)+)?(?:\\x22)))@(?:(?:(?:[a-zA-Z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(?:(?:[a-zA-Z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])(?:[a-zA-Z]|\\d|-|\\.|_|~|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])*(?:[a-zA-Z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])))\\.)+(?:(?:[a-zA-Z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(?:(?:[a-zA-Z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])(?:[a-zA-Z]|\\d|-|\\.|_|~|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])*(?:[a-zA-Z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])))\\.?$"
+	base64RegexString                = "^(?:[A-Za-z0-9+\\/]{4})*(?:[A-Za-z0-9+\\/]{2}==|[A-Za-z0-9+\\/]{3}=|[A-Za-z0-9+\\/]{4})$"
+	base64URLRegexString             = "^(?:[A-Za-z0-9-_]{4})*(?:[A-Za-z0-9-_]{2}==|[A-Za-z0-9-_]{3}=|[A-Za-z0-9-_]{4})$"
+	iSBN10RegexString                = "^(?:[0-9]{9}X|[0-9]{10})$"
+	iSBN13RegexString                = "^(?:(?:97(?:8|9))[0-9]{10})$"
+	uUID3RegexString                 = "^[0-9a-f]{8}-[0-9a-f]{4}-3[0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}$"
+	uUID4RegexString                 = "^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
+	uUID5RegexString                 = "^[0-9a-f]{8}-[0-9a-f]{4}-5[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
+	uUIDRegexString                  = "^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$"
+	aSCIIRegexString                 = "^[\x00-\x7F]*$"
+	printableASCIIRegexString        = "^[\x20-\x7E]*$"
+	multibyteRegexString             = "[^\x00-\x7F]"
+	dataURIRegexString               = "^data:.+\\/(.+);base64$"
+	latitudeRegexString              = "^[-+]?([1-8]?\\d(\\.\\d+)?|90(\\.0+)?)$"
+	longitudeRegexString             = "^[-+]?(180(\\.0+)?|((1[0-7]\\d)|([1-9]?\\d))(\\.\\d+)?)$"
+	sSNRegexString                   = `^\d{3}[- ]?\d{2}[- ]?\d{4}$`
+	hostnameRegexStringRFC952        = `^[a-zA-Z][a-zA-Z0-9\-\.]+[a-z-Az0-9]$`    // https://tools.ietf.org/html/rfc952
+	hostnameRegexStringRFC1123       = `^[a-zA-Z0-9][a-zA-Z0-9\-\.]+[a-z-Az0-9]$` // accepts hostname starting with a digit https://tools.ietf.org/html/rfc1123
+	btcAddressRegexString            = `^[13][a-km-zA-HJ-NP-Z1-9]{25,34}$`        // bitcoin address
+	btcAddressUpperRegexStringBech32 = `^BC1[02-9AC-HJ-NP-Z]{7,76}$`              // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
+	btcAddressLowerRegexStringBech32 = `^bc1[02-9ac-hj-np-z]{7,76}$`              // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
+	ethAddressRegexString            = `^0x[0-9a-fA-F]{40}$`
+	ethAddressUpperRegexString       = `^0x[0-9A-F]{40}$`
+	ethAddressLowerRegexString       = `^0x[0-9a-f]{40}$`
 )
 
 var (
-	alphaRegex               = regexp.MustCompile(alphaRegexString)
-	alphaNumericRegex        = regexp.MustCompile(alphaNumericRegexString)
-	alphaUnicodeRegex        = regexp.MustCompile(alphaUnicodeRegexString)
-	alphaUnicodeNumericRegex = regexp.MustCompile(alphaUnicodeNumericRegexString)
-	numericRegex             = regexp.MustCompile(numericRegexString)
-	numberRegex              = regexp.MustCompile(numberRegexString)
-	hexadecimalRegex         = regexp.MustCompile(hexadecimalRegexString)
-	hexcolorRegex            = regexp.MustCompile(hexcolorRegexString)
-	rgbRegex                 = regexp.MustCompile(rgbRegexString)
-	rgbaRegex                = regexp.MustCompile(rgbaRegexString)
-	hslRegex                 = regexp.MustCompile(hslRegexString)
-	hslaRegex                = regexp.MustCompile(hslaRegexString)
-	emailRegex               = regexp.MustCompile(emailRegexString)
-	base64Regex              = regexp.MustCompile(base64RegexString)
-	base64URLRegex           = regexp.MustCompile(base64URLRegexString)
-	iSBN10Regex              = regexp.MustCompile(iSBN10RegexString)
-	iSBN13Regex              = regexp.MustCompile(iSBN13RegexString)
-	uUID3Regex               = regexp.MustCompile(uUID3RegexString)
-	uUID4Regex               = regexp.MustCompile(uUID4RegexString)
-	uUID5Regex               = regexp.MustCompile(uUID5RegexString)
-	uUIDRegex                = regexp.MustCompile(uUIDRegexString)
-	aSCIIRegex               = regexp.MustCompile(aSCIIRegexString)
-	printableASCIIRegex      = regexp.MustCompile(printableASCIIRegexString)
-	multibyteRegex           = regexp.MustCompile(multibyteRegexString)
-	dataURIRegex             = regexp.MustCompile(dataURIRegexString)
-	latitudeRegex            = regexp.MustCompile(latitudeRegexString)
-	longitudeRegex           = regexp.MustCompile(longitudeRegexString)
-	sSNRegex                 = regexp.MustCompile(sSNRegexString)
-	hostnameRegexRFC952      = regexp.MustCompile(hostnameRegexStringRFC952)
-	hostnameRegexRFC1123     = regexp.MustCompile(hostnameRegexStringRFC1123)
+	alphaRegex                 = regexp.MustCompile(alphaRegexString)
+	alphaNumericRegex          = regexp.MustCompile(alphaNumericRegexString)
+	alphaUnicodeRegex          = regexp.MustCompile(alphaUnicodeRegexString)
+	alphaUnicodeNumericRegex   = regexp.MustCompile(alphaUnicodeNumericRegexString)
+	numericRegex               = regexp.MustCompile(numericRegexString)
+	numberRegex                = regexp.MustCompile(numberRegexString)
+	hexadecimalRegex           = regexp.MustCompile(hexadecimalRegexString)
+	hexcolorRegex              = regexp.MustCompile(hexcolorRegexString)
+	rgbRegex                   = regexp.MustCompile(rgbRegexString)
+	rgbaRegex                  = regexp.MustCompile(rgbaRegexString)
+	hslRegex                   = regexp.MustCompile(hslRegexString)
+	hslaRegex                  = regexp.MustCompile(hslaRegexString)
+	emailRegex                 = regexp.MustCompile(emailRegexString)
+	base64Regex                = regexp.MustCompile(base64RegexString)
+	base64URLRegex             = regexp.MustCompile(base64URLRegexString)
+	iSBN10Regex                = regexp.MustCompile(iSBN10RegexString)
+	iSBN13Regex                = regexp.MustCompile(iSBN13RegexString)
+	uUID3Regex                 = regexp.MustCompile(uUID3RegexString)
+	uUID4Regex                 = regexp.MustCompile(uUID4RegexString)
+	uUID5Regex                 = regexp.MustCompile(uUID5RegexString)
+	uUIDRegex                  = regexp.MustCompile(uUIDRegexString)
+	aSCIIRegex                 = regexp.MustCompile(aSCIIRegexString)
+	printableASCIIRegex        = regexp.MustCompile(printableASCIIRegexString)
+	multibyteRegex             = regexp.MustCompile(multibyteRegexString)
+	dataURIRegex               = regexp.MustCompile(dataURIRegexString)
+	latitudeRegex              = regexp.MustCompile(latitudeRegexString)
+	longitudeRegex             = regexp.MustCompile(longitudeRegexString)
+	sSNRegex                   = regexp.MustCompile(sSNRegexString)
+	hostnameRegexRFC952        = regexp.MustCompile(hostnameRegexStringRFC952)
+	hostnameRegexRFC1123       = regexp.MustCompile(hostnameRegexStringRFC1123)
+	btcAddressRegex            = regexp.MustCompile(btcAddressRegexString)
+	btcUpperAddressRegexBech32 = regexp.MustCompile(btcAddressUpperRegexStringBech32)
+	btcLowerAddressRegexBech32 = regexp.MustCompile(btcAddressLowerRegexStringBech32)
+	ethAddressRegex            = regexp.MustCompile(ethAddressRegexString)
+	ethaddressRegexUpper       = regexp.MustCompile(ethAddressUpperRegexString)
+	ethAddressRegexLower       = regexp.MustCompile(ethAddressLowerRegexString)
 )
diff --git a/validator_test.go b/validator_test.go
index c6467db..2be460c 100644
--- a/validator_test.go
+++ b/validator_test.go
@@ -4446,6 +4446,203 @@ func TestBase64URLValidation(t *testing.T) {
 	}
 }
 
+func TestEthereumAddressValidation(t *testing.T) {
+
+	validate := New()
+
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"", false},
+		{"0x02F9AE5f22EA3fA88F05780B30385bEC", false},
+		{"123f681646d4a755815f9cb19e1acc8565a0c2ac", false},
+		{"0x02F9AE5f22EA3fA88F05780B30385bECFacbf130", true},
+		{"0x123f681646d4a755815f9cb19e1acc8565a0c2ac", true},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Var(test.param, "eth_addr")
+
+		if test.expected {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d eth_addr failed Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d eth_addr failed Error: %s", i, errs)
+			} else {
+				val := getError(errs, "", "")
+				if val.Tag() != "eth_addr" {
+					t.Fatalf("Index: %d Latitude failed Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
+func TestBitcoinAddressValidation(t *testing.T) {
+
+	validate := New()
+
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"", false},
+		{"x", false},
+		{"0x02F9AE5f22EA3fA88F05780B30385bEC", false},
+		{"1A1zP1ePQGefi2DMPTifTL5SLmv7DivfNa", false},
+		{"1P9RQEr2XeE3PEb44ZE35sfZRRW1JH8Uqx", false},
+		{"3P14159I73E4gFr7JterCCQh9QjiTjiZrG", false},
+		{"3P141597f3E4gFr7JterCCQh9QjiTjiZrG", false},
+		{"37qgekLpCCHrQuSjvX3fs496FWTGsHFHizjJAs6NPcR47aefnnCWECAhHV6E3g4YN7u7Yuwod5Y", false},
+		{"dzb7VV1Ui55BARxv7ATxAtCUeJsANKovDGWFVgpTbhq9gvPqP3yv", false},
+		{"MuNu7ZAEDFiHthiunm7dPjwKqrVNCM3mAz6rP9zFveQu14YA8CxExSJTHcVP9DErn6u84E6Ej7S", false},
+		{"rPpQpYknyNQ5AEHuY6H8ijJJrYc2nDKKk9jjmKEXsWzyAQcFGpDLU2Zvsmoi8JLR7hAwoy3RQWf", false},
+		{"4Uc3FmN6NQ6zLBK5QQBXRBUREaaHwCZYsGCueHauuDmJpZKn6jkEskMB2Zi2CNgtb5r6epWEFfUJq", false},
+		{"7aQgR5DFQ25vyXmqZAWmnVCjL3PkBcdVkBUpjrjMTcghHx3E8wb", false},
+		{"17QpPprjeg69fW1DV8DcYYCKvWjYhXvWkov6MJ1iTTvMFj6weAqW7wybZeH57WTNxXVCRH4veVs", false},
+		{"KxuACDviz8Xvpn1xAh9MfopySZNuyajYMZWz16Dv2mHHryznWUp3", false},
+		{"7nK3GSmqdXJQtdohvGfJ7KsSmn3TmGqExug49583bDAL91pVSGq5xS9SHoAYL3Wv3ijKTit65th", false},
+		{"cTivdBmq7bay3RFGEBBuNfMh2P1pDCgRYN2Wbxmgwr4ki3jNUL2va", false},
+		{"gjMV4vjNjyMrna4fsAr8bWxAbwtmMUBXJS3zL4NJt5qjozpbQLmAfK1uA3CquSqsZQMpoD1g2nk", false},
+		{"emXm1naBMoVzPjbk7xpeTVMFy4oDEe25UmoyGgKEB1gGWsK8kRGs", false},
+		{"7VThQnNRj1o3Zyvc7XHPRrjDf8j2oivPTeDXnRPYWeYGE4pXeRJDZgf28ppti5hsHWXS2GSobdqyo", false},
+		{"1G9u6oCVCPh2o8m3t55ACiYvG1y5BHewUkDSdiQarDcYXXhFHYdzMdYfUAhfxn5vNZBwpgUNpso", false},
+		{"31QQ7ZMLkScDiB4VyZjuptr7AEc9j1SjstF7pRoLhHTGkW4Q2y9XELobQmhhWxeRvqcukGd1XCq", false},
+		{"DHqKSnpxa8ZdQyH8keAhvLTrfkyBMQxqngcQA5N8LQ9KVt25kmGN", false},
+		{"2LUHcJPbwLCy9GLH1qXmfmAwvadWw4bp4PCpDfduLqV17s6iDcy1imUwhQJhAoNoN1XNmweiJP4i", false},
+		{"7USRzBXAnmck8fX9HmW7RAb4qt92VFX6soCnts9s74wxm4gguVhtG5of8fZGbNPJA83irHVY6bCos", false},
+		{"1DGezo7BfVebZxAbNT3XGujdeHyNNBF3vnficYoTSp4PfK2QaML9bHzAMxke3wdKdHYWmsMTJVu", false},
+		{"2D12DqDZKwCxxkzs1ZATJWvgJGhQ4cFi3WrizQ5zLAyhN5HxuAJ1yMYaJp8GuYsTLLxTAz6otCfb", false},
+		{"8AFJzuTujXjw1Z6M3fWhQ1ujDW7zsV4ePeVjVo7D1egERqSW9nZ", false},
+		{"163Q17qLbTCue8YY3AvjpUhotuaodLm2uqMhpYirsKjVqnxJRWTEoywMVY3NbBAHuhAJ2cF9GAZ", false},
+		{"2MnmgiRH4eGLyLc9eAqStzk7dFgBjFtUCtu", false},
+		{"461QQ2sYWxU7H2PV4oBwJGNch8XVTYYbZxU", false},
+		{"2UCtv53VttmQYkVU4VMtXB31REvQg4ABzs41AEKZ8UcB7DAfVzdkV9JDErwGwyj5AUHLkmgZeobs", false},
+		{"cSNjAsnhgtiFMi6MtfvgscMB2Cbhn2v1FUYfviJ1CdjfidvmeW6mn", false},
+		{"gmsow2Y6EWAFDFE1CE4Hd3Tpu2BvfmBfG1SXsuRARbnt1WjkZnFh1qGTiptWWbjsq2Q6qvpgJVj", false},
+		{"nksUKSkzS76v8EsSgozXGMoQFiCoCHzCVajFKAXqzK5on9ZJYVHMD5CKwgmX3S3c7M1U3xabUny", false},
+		{"L3favK1UzFGgdzYBF2oBT5tbayCo4vtVBLJhg2iYuMeePxWG8SQc", false},
+		{"7VxLxGGtYT6N99GdEfi6xz56xdQ8nP2dG1CavuXx7Rf2PrvNMTBNevjkfgs9JmkcGm6EXpj8ipyPZ ", false},
+		{"2mbZwFXF6cxShaCo2czTRB62WTx9LxhTtpP", false},
+		{"dB7cwYdcPSgiyAwKWL3JwCVwSk6epU2txw", false},
+		{"HPhFUhUAh8ZQQisH8QQWafAxtQYju3SFTX", false},
+		{"4ctAH6AkHzq5ioiM1m9T3E2hiYEev5mTsB", false},
+		{"31uEbMgunupShBVTewXjtqbBv5MndwfXhb", false},
+		{"175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W", false},
+		{"Hn1uFi4dNexWrqARpjMqgT6cX1UsNPuV3cHdGg9ExyXw8HTKadbktRDtdeVmY3M1BxJStiL4vjJ", false},
+		{"Sq3fDbvutABmnAHHExJDgPLQn44KnNC7UsXuT7KZecpaYDMU9Txs", false},
+		{"6TqWyrqdgUEYDQU1aChMuFMMEimHX44qHFzCUgGfqxGgZNMUVWJ", false},
+		{"giqJo7oWqFxNKWyrgcBxAVHXnjJ1t6cGoEffce5Y1y7u649Noj5wJ4mmiUAKEVVrYAGg2KPB3Y4", false},
+		{"cNzHY5e8vcmM3QVJUcjCyiKMYfeYvyueq5qCMV3kqcySoLyGLYUK", false},
+		{"37uTe568EYc9WLoHEd9jXEvUiWbq5LFLscNyqvAzLU5vBArUJA6eydkLmnMwJDjkL5kXc2VK7ig", false},
+		{"EsYbG4tWWWY45G31nox838qNdzksbPySWc", false},
+		{"nbuzhfwMoNzA3PaFnyLcRxE9bTJPDkjZ6Rf6Y6o2ckXZfzZzXBT", false},
+		{"cQN9PoxZeCWK1x56xnz6QYAsvR11XAce3Ehp3gMUdfSQ53Y2mPzx", false},
+		{"1Gm3N3rkef6iMbx4voBzaxtXcmmiMTqZPhcuAepRzYUJQW4qRpEnHvMojzof42hjFRf8PE2jPde", false},
+		{"2TAq2tuN6x6m233bpT7yqdYQPELdTDJn1eU", false},
+		{"ntEtnnGhqPii4joABvBtSEJG6BxjT2tUZqE8PcVYgk3RHpgxgHDCQxNbLJf7ardf1dDk2oCQ7Cf", false},
+		{"Ky1YjoZNgQ196HJV3HpdkecfhRBmRZdMJk89Hi5KGfpfPwS2bUbfd", false},
+		{"2A1q1YsMZowabbvta7kTy2Fd6qN4r5ZCeG3qLpvZBMzCixMUdkN2Y4dHB1wPsZAeVXUGD83MfRED", false},
+		{"1AGNa15ZQXAZUgFiqJ2i7Z2DPU2J6hW62i", true},
+		{"1Ax4gZtb7gAit2TivwejZHYtNNLT18PUXJ", true},
+		{"1C5bSj1iEGUgSTbziymG7Cn18ENQuT36vv", true},
+		{"1Gqk4Tv79P91Cc1STQtU3s1W6277M2CVWu", true},
+		{"1JwMWBVLtiqtscbaRHai4pqHokhFCbtoB4", true},
+		{"19dcawoKcZdQz365WpXWMhX6QCUpR9SY4r", true},
+		{"13p1ijLwsnrcuyqcTvJXkq2ASdXqcnEBLE", true},
+		{"1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2", true},
+		{"3P14159f73E4gFr7JterCCQh9QjiTjiZrG", true},
+		{"3CMNFxN1oHBc4R1EpboAL5yzHGgE611Xou", true},
+		{"3QjYXhTkvuj8qPaXHTTWb5wjXhdsLAAWVy", true},
+		{"3AnNxabYGoTxYiTEZwFEnerUoeFXK2Zoks", true},
+		{"33vt8ViH5jsr115AGkW6cEmEz9MpvJSwDk", true},
+		{"3QCzvfL4ZRvmJFiWWBVwxfdaNBT8EtxB5y", true},
+		{"37Sp6Rv3y4kVd1nQ1JV5pfqXccHNyZm1x3", true},
+		{"3ALJH9Y951VCGcVZYAdpA3KchoP9McEj1G", true},
+		{"12KYrjTdVGjFMtaxERSk3gphreJ5US8aUP", true},
+		{"12QeMLzSrB8XH8FvEzPMVoRxVAzTr5XM2y", true},
+		{"1oNLrsHnBcR6dpaBpwz3LSwutbUNkNSjs", true},
+		{"1SQHtwR5oJRKLfiWQ2APsAd9miUc4k2ez", true},
+		{"116CGDLddrZhMrTwhCVJXtXQpxygTT1kHd", true},
+		{"3NJZLcZEEYBpxYEUGewU4knsQRn1WM5Fkt", true},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Var(test.param, "btc_addr")
+
+		if test.expected {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d btc_addr failed with Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d btc_addr failed with Error: %s", i, errs)
+			} else {
+				val := getError(errs, "", "")
+				if val.Tag() != "btc_addr" {
+					t.Fatalf("Index: %d Latitude failed with Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
+func TestBitcoinBech32AddressValidation(t *testing.T) {
+
+	validate := New()
+
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"", false},
+		{"bc1rw5uspcuh", false},
+		{"bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t5", false},
+		{"BC13W508D6QEJXTDG4Y5R3ZARVARY0C5XW7KN40WF2", false},
+		{"qw508d6qejxtdg4y5r3zarvary0c5xw7kg3g4ty", false},
+		{"bc1rw5uspcuh", false},
+		{"bc10w508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kw5rljs90", false},
+		{"BC1QW508d6QEJxTDG4y5R3ZArVARY0C5XW7KV8F3T4", false},
+		{"BC1QR508D6QEJXTDG4Y5R3ZARVARYV98GJ9P", false},
+		{"bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t5", false},
+		{"bc10w508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7kw5rljs90", false},
+		{"bc1pw508d6qejxtdg4y5r3zarqfsj6c3", false},
+		{"bc1zw508d6qejxtdg4y5r3zarvaryvqyzf3du", false},
+		{"bc1gmk9yu", false},
+		{"bc1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3pjxtptv", false},
+		{"BC1QW508D6QEJXTDG4Y5R3ZARVARY0C5XW7KV8F3T4", true},
+		{"bc1pw508d6qejxtdg4y5r3zarvary0c5xw7kw508d6qejxtdg4y5r3zarvary0c5xw7k7grplx", true},
+		{"bc1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3qccfmv3", true},
+		{"BC1SW50QA3JX3S", true},
+		{"bc1zw508d6qejxtdg4y5r3zarvaryvg6kdaj", true},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Var(test.param, "btc_addr_bech32")
+
+		if test.expected {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d btc_addr_bech32 failed with Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d btc_addr_bech32 failed with Error: %s", i, errs)
+			} else {
+				val := getError(errs, "", "")
+				if val.Tag() != "btc_addr_bech32" {
+					t.Fatalf("Index: %d Latitude failed with Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
 func TestNoStructLevelValidation(t *testing.T) {
 
 	type Inner struct {