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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package utils | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
|
|
||
| "github.com/filecoin-project/go-commp-utils/ffiwrapper" | ||
| "github.com/filecoin-project/go-padreader" | ||
| "github.com/filecoin-project/go-state-types/abi" | ||
| types "github.com/filecoin-project/venus/venus-shared/types/market/client" | ||
| "github.com/ipld/go-car" | ||
| ) | ||
|
|
||
| func CalcCommP(ctx context.Context, inpath string) (*types.CommPRet, error) { | ||
| // Hard-code the sector type to 32GiBV1_1, because: | ||
| // - ffiwrapper.GeneratePieceCIDFromFile requires a RegisteredSealProof | ||
| // - commP itself is sector-size independent, with rather low probability of that changing | ||
| // ( note how the final rust call is identical for every RegSP type ) | ||
| // https://github.com/filecoin-project/rust-filecoin-proofs-api/blob/v5.0.0/src/seal.rs#L1040-L1050 | ||
| // | ||
| // IF/WHEN this changes in the future we will have to be able to calculate | ||
| // "old style" commP, and thus will need to introduce a version switch or similar | ||
| arbitraryProofType := abi.RegisteredSealProof_StackedDrg32GiBV1_1 | ||
|
|
||
| rdr, err := os.Open(inpath) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer rdr.Close() //nolint:errcheck | ||
|
|
||
| stat, err := rdr.Stat() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // check that the data is a car file; if it's not, retrieval won't work | ||
| _, err = car.ReadHeader(bufio.NewReader(rdr)) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("not a car file: %w", err) | ||
| } | ||
|
|
||
| if _, err := rdr.Seek(0, io.SeekStart); err != nil { | ||
| return nil, fmt.Errorf("seek to start: %w", err) | ||
| } | ||
|
|
||
| pieceReader, pieceSize := padreader.New(rdr, uint64(stat.Size())) | ||
| commP, err := ffiwrapper.GeneratePieceCIDFromFile(arbitraryProofType, pieceReader, pieceSize) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("computing commP failed: %w", err) | ||
| } | ||
|
|
||
| return &types.CommPRet{ | ||
| Root: commP, | ||
| Size: pieceSize, | ||
| }, nil | ||
| } |