Initial commit

go.mod

@@ -0,0 +1,3 @@
+module git.grassecon.net/grassrootseconomics/common
+
+go 1.23.4

identity/address.go

@@ -0,0 +1,15 @@
+package identity
+
+import (
+	"regexp"
+)
+// Define the regex patterns as constants
+const (
+	addressRegex = `^0x[a-fA-F0-9]{40}$`
+)
+
+// IsValidAddress checks if the given address is a valid Ethereum address
+func IsValidAddress(address string) bool {
+	match, _ := regexp.MatchString(addressRegex, address)
+	return match
+}

identity/alias.go

@@ -0,0 +1,15 @@
+package identity
+
+import (
+	"regexp"
+)
+
+const (
+	aliasRegex   = `^[a-zA-Z0-9]+$`
+)
+
+// IsValidAlias checks if the alias is a valid alias format
+func IsValidAlias(alias string) bool {
+	match, _ := regexp.MatchString(aliasRegex, alias)
+	return match
+}

identity/identity.go

@@ -0,0 +1,24 @@
+package identity
+
+import (
+	"fmt"
+
+	"git.grassecon.net/grassrootseconomics/common/phone"
+)
+
+// CheckRecipient validates the recipient format based on the criteria
+func CheckRecipient(recipient string) (string, error) {
+	if phone.IsValidPhoneNumber(recipient) {
+		return "phone number", nil
+	}
+
+	if IsValidAddress(recipient) {
+		return "address", nil
+	}
+
+	if IsValidAlias(recipient) {
+		return "alias", nil
+	}
+
+	return "", fmt.Errorf("invalid recipient: must be a phone number, address or alias")
+}

phone/phone.go

@@ -0,0 +1,16 @@
+package phone
+
+import (
+	"regexp"
+)
+
+// Define the regex patterns as constants
+const (
+	phoneRegex   = `^(?:\+254|254|0)?((?:7[0-9]{8})|(?:1[01][0-9]{7}))$`
+)
+
+// IsValidPhoneNumber checks if the given number is a valid phone number
+func IsValidPhoneNumber(phonenumber string) bool {
+	match, _ := regexp.MatchString(phoneRegex, phonenumber)
+	return match
+}