refactor(proto): remove macaroon proto

x/did/keeper/issuer.go

@@ -0,0 +1,59 @@
+package keeper
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"time"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	didtypes "github.com/onsonr/sonr/x/did/types"
+	"gopkg.in/macaroon.v2"
+)
+
+var fourYears = time.Hour * 24 * 365 * 4
+
+// IssueAdminMacaroon creates a macaroon with the specified parameters.
+func (k Keeper) IssueAdminMacaroon(sdkctx sdk.Context, controller didtypes.ControllerI) (*macaroon.Macaroon, error) {
+	// Derive the root key by hashing the shared MPC public key
+	rootKey := sha256.Sum256([]byte(controller.RawPublicKey()))
+	// Create the macaroon
+	m, err := macaroon.New(rootKey[:], []byte(controller.SonrAddress()), controller.ChainID(), macaroon.LatestVersion)
+	if err != nil {
+		return nil, err
+	}
+
+	// Add the block expiry caveat
+	caveat := fmt.Sprintf("block-expiry=%d", calculateBlockExpiry(sdkctx, fourYears))
+	err = m.AddFirstPartyCaveat([]byte(caveat))
+	if err != nil {
+		return nil, err
+	}
+
+	return m, nil
+}
+
+// IssueServiceMacaroon creates a macaroon with the specified parameters.
+func (k Keeper) IssueServiceMacaroon(sdkctx sdk.Context, sharedMPCPubKey, location, id string, blockExpiry uint64) (*macaroon.Macaroon, error) {
+	// Derive the root key by hashing the shared MPC public key
+	rootKey := sha256.Sum256([]byte(sharedMPCPubKey))
+	// Create the macaroon
+	m, err := macaroon.New(rootKey[:], []byte(id), location, macaroon.LatestVersion)
+	if err != nil {
+		return nil, err
+	}
+
+	// Add the block expiry caveat
+	caveat := fmt.Sprintf("block-expiry=%d", blockExpiry)
+	err = m.AddFirstPartyCaveat([]byte(caveat))
+	if err != nil {
+		return nil, err
+	}
+
+	return m, nil
+}
+
+func calculateBlockExpiry(sdkctx sdk.Context, duration time.Duration) uint64 {
+	blockTime := sdkctx.BlockTime()
+	avgBlockTime := float64(blockTime.Sub(blockTime).Seconds())
+	return uint64(duration.Seconds() / avgBlockTime)
+}