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feat: ADR-040: ICS-23 proofs for SMT store #10015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| package root | ||
| package multi | ||
|
|
||
| import ( | ||
| "github.com/cosmos/cosmos-sdk/store/cachekv" | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package multi | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
|
|
||
| "github.com/tendermint/tendermint/crypto/merkle" | ||
| tmcrypto "github.com/tendermint/tendermint/proto/tendermint/crypto" | ||
|
|
||
| types "github.com/cosmos/cosmos-sdk/store/v2" | ||
| "github.com/cosmos/cosmos-sdk/store/v2/smt" | ||
| ) | ||
|
|
||
| // DefaultProofRuntime returns a ProofRuntime supporting SMT and simple merkle proofs. | ||
| func DefaultProofRuntime() (prt *merkle.ProofRuntime) { | ||
| prt = merkle.NewProofRuntime() | ||
| prt.RegisterOpDecoder(types.ProofOpSMTCommitment, types.CommitmentOpDecoder) | ||
| prt.RegisterOpDecoder(types.ProofOpSimpleMerkleCommitment, types.CommitmentOpDecoder) | ||
| return prt | ||
| } | ||
|
|
||
| // Prove commitment of key within an smt store and return ProofOps | ||
| func proveKey(s *smt.Store, key []byte) (*tmcrypto.ProofOps, error) { | ||
| var ret tmcrypto.ProofOps | ||
| keyProof, err := s.GetProofICS23(key) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| hkey := sha256.Sum256(key) | ||
| ret.Ops = append(ret.Ops, types.NewSmtCommitmentOp(hkey[:], keyProof).ProofOp()) | ||
| return &ret, nil | ||
| } | ||
|
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||
| // GetProof returns ProofOps containing: a proof for the given key within this substore; | ||
| // and a proof of the substore's existence within the MultiStore. | ||
| func (s *viewSubstore) GetProof(key []byte) (*tmcrypto.ProofOps, error) { | ||
| ret, err := proveKey(s.stateCommitmentStore, key) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Prove commitment of substore within root store | ||
| storeHashes, err := s.root.getMerkleRoots() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| storeProof, err := types.ProofOpFromMap(storeHashes, s.name) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ret.Ops = append(ret.Ops, storeProof) | ||
| return ret, nil | ||
| } |
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lat return value is an error - we must check it.
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it's actually the list of keys in the map: