45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package index
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import (
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"context"
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"errors"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/ipfs/go-cid"
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)
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var ErrNotFound = errors.New("message not found")
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var ErrClosed = errors.New("index closed")
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// MsgInfo is the Message metadata the index tracks.
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type MsgInfo struct {
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// the message this record refers to
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Message cid.Cid
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// the tipset where this messages was executed
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TipSet cid.Cid
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// the epoch whre this message was executed
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Epoch abi.ChainEpoch
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// the canonical execution order of the message in the tipset
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Index int
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}
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// MsgIndex is the interface to the message index
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type MsgIndex interface {
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// GetMsgInfo retrieves the message metadata through the index.
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GetMsgInfo(ctx context.Context, m cid.Cid) (MsgInfo, error)
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// Close closes the index
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Close() error
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}
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type dummyMsgIndex struct{}
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func (_ dummyMsgIndex) GetMsgInfo(ctx context.Context, m cid.Cid) (MsgInfo, error) {
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return MsgInfo{}, ErrNotFound
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}
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func (_ dummyMsgIndex) Close() error {
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return nil
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}
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var DummyMsgIndex MsgIndex = dummyMsgIndex{}
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