Go

go get github.com/worldcoin/idkit/go/idkit@latest

import "github.com/worldcoin/idkit/go/idkit"

// For uniqueness proofs: include the action
sig, err := idkit.SignRequest(
	os.Getenv("RP_SIGNING_KEY"),
	idkit.WithAction("my-action"),
)
if err != nil {
	// handle error
}

rpContext := map[string]any{
	"rp_id":      "rp_xxxxx",
	"nonce":      sig.Nonce,
	"created_at": sig.CreatedAt,
	"expires_at": sig.ExpiresAt,
	"signature":  sig.Sig,
}

signer, err := idkit.NewSigner(os.Getenv("RP_SIGNING_KEY"))
if err != nil {
	log.Fatal(err)
}

// Use in your request handler
sig, err := signer.SignRequest(
	idkit.WithAction("my-action"),
	idkit.WithTTL(600), // optional, default 300s
)

type RpSignature struct {
	Sig       string `json:"sig"`        // 0x-prefixed, 65-byte hex
	Nonce     string `json:"nonce"`      // 0x-prefixed, 32-byte field element
	CreatedAt uint64 `json:"created_at"` // Unix seconds
	ExpiresAt uint64 `json:"expires_at"` // Unix seconds
}