github.com/chainsafe/chainbridge-ethereum-trie

chainbridge-ethereum-trie

This package exposes the transaction trie from go-ethereum, so it can be used to (re)construct tries and compute proofs.

Example Usage

Here is an example of how this library could be used.

// assume trieDB is some already instantiated leveldb instance
// assume the listener has retrieved the transactions root (txRoot), transactions (txList), and key of the transaction of interest (txPath) for some block while polling

// instantiate new instance of TxTries object
txTries := NewTxTries(3)

// add new trie to the txtries object with relevant txRoot, transactions, and triedb
txTries.AddNewTrie(txRoot, txList, trieDB)

// we can retrieve a proof for our transaction of interest and verify it as follows
txProof := txTries.RetrieveProof(txRoot, txPath)
exists := VerifyProof(txRoot, txPath, txProof)

if exists {
    // we know the transaction exists in our trie
    // perform some action
}

// we can also retrieve the encoded version of the proof for our transaction of interest as follows:
encodedTxProof := txTries.RetrieveEncodedProof(txRoot, txPath)