forked from celestiaorg/celestia-node
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat: add support for Blobstream API (celestiaorg#3470)
Co-authored-by: rene <[email protected]>
- Loading branch information
1 parent
fd32379
commit 651c95b
Showing
26 changed files
with
1,477 additions
and
74 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| package blob | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
|
|
||
| coretypes "github.com/tendermint/tendermint/types" | ||
|
|
||
| "github.com/celestiaorg/celestia-app/pkg/appconsts" | ||
| "github.com/celestiaorg/celestia-app/pkg/shares" | ||
| "github.com/celestiaorg/nmt" | ||
| "github.com/celestiaorg/nmt/namespace" | ||
|
|
||
| "github.com/celestiaorg/celestia-node/share" | ||
| ) | ||
|
|
||
| // Commitment is a Merkle Root of the subtree built from shares of the Blob. | ||
| // It is computed by splitting the blob into shares and building the Merkle subtree to be included | ||
| // after Submit. | ||
| type Commitment []byte | ||
|
|
||
| // CommitmentProof is an inclusion proof of a commitment to the data root. | ||
| type CommitmentProof struct { | ||
| // SubtreeRoots are the subtree roots of the blob's data that are | ||
| // used to create the commitment. | ||
| SubtreeRoots [][]byte `json:"subtree_roots"` | ||
| // SubtreeRootProofs are the NMT proofs for the subtree roots | ||
| // to the row roots. | ||
| SubtreeRootProofs []*nmt.Proof `json:"subtree_root_proofs"` | ||
| // NamespaceID is the namespace id of the commitment being proven. This | ||
| // namespace id is used when verifying the proof. If the namespace id doesn't | ||
| // match the namespace of the shares, the proof will fail verification. | ||
| NamespaceID namespace.ID `json:"namespace_id"` | ||
| // RowProof is the proof of the rows containing the blob's data to the | ||
| // data root. | ||
| RowProof coretypes.RowProof `json:"row_proof"` | ||
| NamespaceVersion uint8 `json:"namespace_version"` | ||
| } | ||
|
|
||
| func (com Commitment) String() string { | ||
| return string(com) | ||
| } | ||
|
|
||
| // Equal ensures that commitments are the same | ||
| func (com Commitment) Equal(c Commitment) bool { | ||
| return bytes.Equal(com, c) | ||
| } | ||
|
|
||
| // Validate performs basic validation to the commitment proof. | ||
| // Note: it doesn't verify if the proof is valid or not. | ||
| // Check Verify() for that. | ||
| func (commitmentProof *CommitmentProof) Validate() error { | ||
| if len(commitmentProof.SubtreeRoots) < len(commitmentProof.SubtreeRootProofs) { | ||
| return fmt.Errorf( | ||
| "the number of subtree roots %d should be bigger than the number of subtree root proofs %d", | ||
| len(commitmentProof.SubtreeRoots), | ||
| len(commitmentProof.SubtreeRootProofs), | ||
| ) | ||
| } | ||
| if len(commitmentProof.SubtreeRootProofs) != len(commitmentProof.RowProof.Proofs) { | ||
| return fmt.Errorf( | ||
| "the number of subtree root proofs %d should be equal to the number of row root proofs %d", | ||
| len(commitmentProof.SubtreeRootProofs), | ||
| len(commitmentProof.RowProof.Proofs), | ||
| ) | ||
| } | ||
| if int(commitmentProof.RowProof.EndRow-commitmentProof.RowProof.StartRow+1) != len(commitmentProof.RowProof.RowRoots) { | ||
| return fmt.Errorf( | ||
| "the number of rows %d must equal the number of row roots %d", | ||
| int(commitmentProof.RowProof.EndRow-commitmentProof.RowProof.StartRow+1), | ||
| len(commitmentProof.RowProof.RowRoots), | ||
| ) | ||
| } | ||
| if len(commitmentProof.RowProof.Proofs) != len(commitmentProof.RowProof.RowRoots) { | ||
| return fmt.Errorf( | ||
| "the number of proofs %d must equal the number of row roots %d", | ||
| len(commitmentProof.RowProof.Proofs), | ||
| len(commitmentProof.RowProof.RowRoots), | ||
| ) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Verify verifies that a commitment proof is valid, i.e., the subtree roots commit | ||
| // to some data that was posted to a square. | ||
| // Expects the commitment proof to be properly formulated and validated | ||
| // using the Validate() function. | ||
| func (commitmentProof *CommitmentProof) Verify(root []byte, subtreeRootThreshold int) (bool, error) { | ||
| nmtHasher := nmt.NewNmtHasher(appconsts.NewBaseHashFunc(), share.NamespaceSize, true) | ||
|
|
||
| // computes the total number of shares proven. | ||
| numberOfShares := 0 | ||
| for _, proof := range commitmentProof.SubtreeRootProofs { | ||
| numberOfShares += proof.End() - proof.Start() | ||
| } | ||
|
|
||
| // use the computed total number of shares to calculate the subtree roots | ||
| // width. | ||
| // the subtree roots width is defined in ADR-013: | ||
| // | ||
| //https://github.com/celestiaorg/celestia-app/blob/main/docs/architecture/adr-013-non-interactive-default-rules-for-zero-padding.md | ||
| subtreeRootsWidth := shares.SubTreeWidth(numberOfShares, subtreeRootThreshold) | ||
|
|
||
| // verify the proof of the subtree roots | ||
| subtreeRootsCursor := 0 | ||
| for i, subtreeRootProof := range commitmentProof.SubtreeRootProofs { | ||
| // calculate the share range that each subtree root commits to. | ||
| ranges, err := nmt.ToLeafRanges(subtreeRootProof.Start(), subtreeRootProof.End(), subtreeRootsWidth) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| valid, err := subtreeRootProof.VerifySubtreeRootInclusion( | ||
| nmtHasher, | ||
| commitmentProof.SubtreeRoots[subtreeRootsCursor:subtreeRootsCursor+len(ranges)], | ||
| subtreeRootsWidth, | ||
| commitmentProof.RowProof.RowRoots[i], | ||
| ) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| if !valid { | ||
| return false, | ||
| fmt.Errorf( | ||
| "subtree root proof for range [%d, %d) is invalid", | ||
| subtreeRootProof.Start(), | ||
| subtreeRootProof.End(), | ||
| ) | ||
| } | ||
| subtreeRootsCursor += len(ranges) | ||
| } | ||
|
|
||
| // verify row roots to data root proof | ||
| return commitmentProof.RowProof.VerifyProof(root), nil | ||
| } |
Oops, something went wrong.