53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
package multi
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import (
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"crypto/sha256"
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"github.com/tendermint/tendermint/crypto/merkle"
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tmcrypto "github.com/tendermint/tendermint/proto/tendermint/crypto"
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types "github.com/cosmos/cosmos-sdk/store/v2alpha1"
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"github.com/cosmos/cosmos-sdk/store/v2alpha1/smt"
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)
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// DefaultProofRuntime returns a ProofRuntime supporting SMT and simple merkle proofs.
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func DefaultProofRuntime() (prt *merkle.ProofRuntime) {
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prt = merkle.NewProofRuntime()
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prt.RegisterOpDecoder(types.ProofOpSMTCommitment, types.CommitmentOpDecoder)
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prt.RegisterOpDecoder(types.ProofOpSimpleMerkleCommitment, types.CommitmentOpDecoder)
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return prt
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}
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// Prove commitment of key within an smt store and return ProofOps
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func proveKey(s *smt.Store, key []byte) (*tmcrypto.ProofOps, error) {
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var ret tmcrypto.ProofOps
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keyProof, err := s.GetProofICS23(key)
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if err != nil {
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return nil, err
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}
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hkey := sha256.Sum256(key)
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ret.Ops = append(ret.Ops, types.NewSmtCommitmentOp(hkey[:], keyProof).ProofOp())
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return &ret, nil
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}
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// GetProof returns ProofOps containing: a proof for the given key within this substore;
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// and a proof of the substore's existence within the MultiStore.
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func (s *viewSubstore) GetProof(key []byte) (*tmcrypto.ProofOps, error) {
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ret, err := proveKey(s.stateCommitmentStore, key)
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if err != nil {
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return nil, err
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}
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// Prove commitment of substore within root store
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storeHashes, err := s.root.getMerkleRoots()
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if err != nil {
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return nil, err
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}
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storeProof, err := types.ProofOpFromMap(storeHashes, s.name)
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if err != nil {
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return nil, err
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}
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ret.Ops = append(ret.Ops, storeProof)
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return ret, nil
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}
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