add main project files

internal/client/main.go

@@ -0,0 +1,61 @@
+package client
+
+import (
+	"time"
+
+	"github.com/altcha-org/altcha-lib-go"
+)
+
+type Client struct {
+	hmacKey		string
+	maxNumber	int64
+	algorithm	altcha.Algorithm
+	salt		string
+	expire		string
+	checkExpire	bool
+}
+
+func NewClient(hmacKey string, maxNumber int64, algorithm string, salt string, expire string, checkExpire bool) *Client {
+	return &Client {
+		hmacKey:		hmacKey,
+		maxNumber:		maxNumber,
+		algorithm:		altcha.Algorithm(algorithm),
+		salt:			salt,
+		expire:			expire,
+		checkExpire:	checkExpire,
+	}
+}
+
+func (c *Client) Generate() (altcha.Challenge, error) {
+	expirationDuration, _ := time.ParseDuration(c.expire+"s")
+	expiration := time.Now().Add(expirationDuration)
+	
+	options := altcha.ChallengeOptions{
+		HMACKey:	c.hmacKey,
+		MaxNumber:	c.maxNumber,
+		Algorithm:	c.algorithm,
+		Expires: 	&expiration,
+	}
+
+	if len(c.salt) > 0 {
+		options.Salt = c.salt
+	}
+
+	return altcha.CreateChallenge(options)
+}
+
+func (c *Client) Solve(challenge string) (*altcha.Solution, error) {
+	return altcha.SolveChallenge(challenge, c.salt, c.algorithm, int(c.maxNumber), 0, make(<-chan struct{}))
+}
+
+func (c *Client) VerifySolution(payload interface{}) (bool, error) {
+	return altcha.VerifySolution(payload, c.hmacKey, c.checkExpire)
+}
+
+func (c *Client) VerifyServerSignature(payload interface{}) (bool, altcha.ServerSignatureVerificationData, error) {
+	return altcha.VerifyServerSignature(payload, c.hmacKey)
+}
+
+func (c *Client) VerifyFieldsHash(formData map[string][]string, fields []string, fieldsHash string) (bool, error) {
+	return altcha.VerifyFieldsHash(formData, fields, fieldsHash, c.algorithm)
+}