68 lines
1.3 KiB
Go
68 lines
1.3 KiB
Go
package splitstore
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import (
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"encoding/binary"
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"golang.org/x/xerrors"
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cid "github.com/ipfs/go-cid"
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mh "github.com/multiformats/go-multihash"
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"github.com/filecoin-project/go-state-types/abi"
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)
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func epochToBytes(epoch abi.ChainEpoch) []byte {
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return uint64ToBytes(uint64(epoch))
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}
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func bytesToEpoch(buf []byte) abi.ChainEpoch {
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return abi.ChainEpoch(bytesToUint64(buf))
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}
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func int64ToBytes(i int64) []byte {
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return uint64ToBytes(uint64(i))
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}
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func bytesToInt64(buf []byte) int64 {
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return int64(bytesToUint64(buf))
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}
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func uint64ToBytes(i uint64) []byte {
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buf := make([]byte, 16)
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n := binary.PutUvarint(buf, i)
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return buf[:n]
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}
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func bytesToUint64(buf []byte) uint64 {
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i, _ := binary.Uvarint(buf)
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return i
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}
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func isUnitaryObject(c cid.Cid) bool {
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pre := c.Prefix()
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switch pre.Codec {
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case cid.FilCommitmentSealed, cid.FilCommitmentUnsealed:
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return true
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default:
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return pre.MhType == mh.IDENTITY
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}
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}
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func isIdentiyCid(c cid.Cid) bool {
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return c.Prefix().MhType == mh.IDENTITY
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}
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func decodeIdentityCid(c cid.Cid) ([]byte, error) {
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dmh, err := mh.Decode(c.Hash())
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if err != nil {
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return nil, xerrors.Errorf("error decoding identity cid %s: %w", c, err)
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}
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// sanity check
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if dmh.Code != mh.IDENTITY {
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return nil, xerrors.Errorf("error decoding identity cid %s: hash type is not identity", c)
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}
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return dmh.Digest, nil
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}
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