Add issuer identity filter to IssuedBalance, ListRedeemedTokens, RedeemedBalance

Signed-off-by: Soumya Mohapatra <mohapatras@microsoft.com>

Author: Soumya Mohapatra

token/driver/mock/qe.go

@@ -86,13 +86,16 @@ type QueryEngine interface {
 	ListHistoryIssuedTokens(ctx context.Context) (*token.IssuedTokens, error)
 	// IssuedBalance returns the sum of amounts of non-deleted tokens flagged as issued.
 	// If tokenType is non-empty, only tokens of that type are included.
-	IssuedBalance(ctx context.Context, tokenType token.Type) (uint64, error)
+	// If issuerRaw is non-empty, only tokens issued by that identity are included.
+	IssuedBalance(ctx context.Context, tokenType token.Type, issuerRaw Identity) (uint64, error)
 	// ListRedeemedTokens returns issued tokens that were spent by a Redeem action.
 	// If tokenType is non-empty, only tokens of that type are included.
-	ListRedeemedTokens(ctx context.Context, tokenType token.Type) (*token.IssuedTokens, error)
+	// If issuerRaw is non-empty, only tokens issued by that identity are included.
+	ListRedeemedTokens(ctx context.Context, tokenType token.Type, issuerRaw Identity) (*token.IssuedTokens, error)
 	// RedeemedBalance returns the sum of amounts of issued tokens spent by a Redeem action.
 	// If tokenType is non-empty, only tokens of that type are included.
-	RedeemedBalance(ctx context.Context, tokenType token.Type) (uint64, error)
+	// If issuerRaw is non-empty, only tokens issued by that identity are included.
+	RedeemedBalance(ctx context.Context, tokenType token.Type, issuerRaw Identity) (uint64, error)
 	// PublicParams returns the serialized public parameters used by the driver.
 	PublicParams(ctx context.Context) ([]byte, error)
 	// GetTokenMetadata retrieves the private information (metadata) for the given token IDs.