feat(trie): export LoadFromProof (#2455)

Author: qdm12

lib/trie/database.go

@@ -78,15 +78,17 @@ func (t *Trie) store(db chaindb.Batch, n Node) error {
 	return nil
 }
 
-// loadFromProof create a partial trie based on the proof slice, as it only contains nodes that are in the proof afaik.
-func (t *Trie) loadFromProof(rawProof [][]byte, rootHash []byte) error {
-	if len(rawProof) == 0 {
+// LoadFromProof sets a partial trie based on the proof slice of encoded nodes.
+// Note this is exported because it is imported  is used by:
+// https://github.com/ComposableFi/ibc-go/blob/6d62edaa1a3cb0768c430dab81bb195e0b0c72db/modules/light-clients/11-beefy/types/client_state.go#L78
+func (t *Trie) LoadFromProof(proofEncodedNodes [][]byte, rootHash []byte) error {
+	if len(proofEncodedNodes) == 0 {
 		return ErrEmptyProof
 	}
 
-	proofHashToNode := make(map[string]Node, len(rawProof))
+	proofHashToNode := make(map[string]Node, len(proofEncodedNodes))
 
-	for i, rawNode := range rawProof {
+	for i, rawNode := range proofEncodedNodes {
 		decodedNode, err := node.Decode(bytes.NewReader(rawNode))
 		if err != nil {
 			return fmt.Errorf("%w: at index %d: 0x%x",

lib/trie/proof.go

@@ -84,7 +84,7 @@ func VerifyProof(proof [][]byte, root []byte, items []Pair) (bool, error) {
 	}
 
 	proofTrie := NewEmptyTrie()
-	if err := proofTrie.loadFromProof(proof, root); err != nil {
+	if err := proofTrie.LoadFromProof(proof, root); err != nil {
 		return false, fmt.Errorf("%w: %s", ErrLoadFromProof, err)
 	}
 

lib/trie/proof_test.go

@@ -161,7 +161,7 @@ func TestVerifyProof_ShouldReturnTrueWithouCompareValues(t *testing.T) {
 	require.NoError(t, err)
 }
 
-func TestBranchNodes_SameHash_DiferentPaths_GenerateAndVerifyProof(t *testing.T) {
+func TestBranchNodes_SameHash_DifferentPaths_GenerateAndVerifyProof(t *testing.T) {
 	value := []byte("somevalue")
 	entries := []Pair{
 		{Key: []byte("d"), Value: value},