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402373cfca
Move the MacaroonBaker type to the new macaroons package to avoid import cycles in future.
35 lines
930 B
Go
35 lines
930 B
Go
package macaroons
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import (
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"context"
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"fmt"
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"strconv"
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"github.com/lightningnetwork/lnd/lnrpc"
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"google.golang.org/protobuf/proto"
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"gopkg.in/macaroon-bakery.v2/bakery"
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"gopkg.in/macaroon.v2"
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)
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// Baker is a function type for baking a super macaroon.
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type Baker func(ctx context.Context, rootKeyID uint64,
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perms []bakery.Op, caveats []macaroon.Caveat) (string, error)
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// RootKeyIDFromMacaroon extracts the root key ID of the passed macaroon.
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func RootKeyIDFromMacaroon(mac *macaroon.Macaroon) (uint64, error) {
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rawID := mac.Id()
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if rawID[0] != byte(bakery.LatestVersion) {
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return 0, fmt.Errorf("mac id is not on the latest version")
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}
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decodedID := &lnrpc.MacaroonId{}
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idProto := rawID[1:]
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err := proto.Unmarshal(idProto, decodedID)
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if err != nil {
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return 0, err
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}
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// The storage ID is a string representation of a 64-bit unsigned
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// number.
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return strconv.ParseUint(string(decodedID.StorageId), 10, 64)
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}
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