zmitton / eth-proof

Get a merkle-proof from the blockchain. Verify it locally.

History of Ethereum Classic

This repository contains the historical data regarding Ethereum Classic.

I've decided to write a little bit about the history of ETC because right now the information is pretty scattered and you have to search for old reddit articles, youtube videos, and others resources to find the information about ETC's past. Sometimes you'll even think you know the history only to later find out there was so much more, but the resources you've read did not mention any of it.

I'm sure there are many things I don't yet know, some of the stories could be inaccurate and I've probably forgotten many things that should be mentioned. This is why I've decided to share write it as a collection of markdown files and put them in a GitHub repository to encourage others to contribute.

The story of ETC is very interesting - better than many movies I've watched - so I encourage you to read it.

I've decided to break the history down in 4 phases to make it a bit easier to grasp the high level of what was happening and through which stages the currency went.

Chapters

• Birth - Ethereum network early days

• Struggle - The DAO nightmare

• Recovery - Showing signs of life

• Rise - Decentralized teams forming around it

I hope you all learn something new. Feel free to fork and open a Pull Request and contribute to the history repository.

eth-proof's Issues

Error: the string "transaction not found" was thrown, throw an Error :)

trying to write some tests for a contact and getting this error at this line:

let proof = await eP.getTransactionProof(txHash);

 Error: the string "transaction not found" was thrown, throw an Error :)
      at <anonymous>
      at process._tickCallback (internal/process/next_tick.js:188:7)

txHash is the hash of a previous transaction. the error seems like txHash isn't valid, but it should be.

here's where I'm generating the txHash:

    	let holdBalanceHash = await contract.holdSafeBalanceForType(10, 1, 100, {from: addressA});
        txHash = holdBalanceHash.tx;

txHash seems to be ok, so I'm not sure where this is going wrong.
any help is much appreciated!

remove ethereumjs-util's huge dependency tree

Is your feature request related to a problem? Please describe.
replace it with another utils library

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

doesn't build on macos

Receipt Proofs do not verify many blocks on main net

Attempting to do a simple build and verify of receipt proofs fail on blocks that seem to have too many transactions. Transaction trie proofs work completely perfectly but receipt trie proofs only work some of the time.

eP = new EP(new Web3.providers.HttpProvider("https://gmainnet.infura.io"));
web3 = new Web3(new Web3.providers.HttpProvider("https://gmainnet.infura.io"));
block = await web3.eth.getBlock(5992178);
eP.getReceiptProof(block.transactions[0]).then( (proof) => {
    verified = EP.receipt(proof.path, proof.value, proof.parentNodes, proof.header, proof.blockHash);
})

This verification fails.

I've forked the repository and added a function that returns the constructed trie root hash and have confirmed that the root node hash does not hash to the value present in the block.

This means that the trie construction must be faulty for some cases. Other blocks that contain few transactions like block 1000002 verify successfully for some reason.

Please attempt to do a receipt verification on any receipt in the block specified in the code above and see if it fails to verify or not.

web3 1.0 usability (this.provider.sendAsync is not a function)

I'm trying to build a proof using a web3 1.0 provider:

const epA = new EthProof(providerA);
const _providerB = `http://${truffleConf.developmentB.host}:${truffleConf.developmentB.port}`;
const providerB = new Web3.providers.HttpProvider(_providerB);

...

epB.getTransactionProof(depositBlock.transactions[0])
.then((proof) => {
   console.log('proof', proof);
})

Which gives me the following error:

TypeError: this.provider.sendAsync is not a function
    at RequestManager.sendAsync (/Users/alexmiller/Projects/trustless-relay/node_modules/eth-proof/node_modules/web3/lib/web3/requestmanager.js:80:19)
    at Eth.send [as getTransaction] (/Users/alexmiller/Projects/trustless-relay/node_modules/eth-proof/node_modules/web3/lib/web3/method.js:141:42)
    at Promise (/Users/alexmiller/Projects/trustless-relay/node_modules/eth-proof/buildProof.js:152:21)
    at Promise (<anonymous>)
    at BuildProof.getTransactionProof (/Users/alexmiller/Projects/trustless-relay/node_modules/eth-proof/buildProof.js:149:10)
    at Context.it (/Users/alexmiller/Projects/trustless-relay/test/relay.js:203:11)
    at callFnAsync (/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runnable.js:371:21)
    at Test.Runnable.run (/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runnable.js:318:7)
    at Runner.runTest (/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js:443:10)
    at /usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js:549:12
    at next (/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js:361:14)
    at /usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js:371:7
    at next (/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js:295:14)
    at Immediate.<anonymous> (/usr/local/lib/node_modules/truffle/node_modules/mocha/lib/runner.js:339:5)
    at runCallback (timers.js:781:20)
    at tryOnImmediate (timers.js:743:5)
    at processImmediate [as _immediateCallback] (timers.js:714:5)

I'm trying to figure out why this would be, but I think it's because I'm using web3 1.0. I'll try to dig into this more, but putting in this issue in case there's an incompatibility issue here.

Question: could this theoretically deliver a proof of eth_call result?

Been playing with verifying ENS resolver results against a known good block hash, but that often takes a bit of poking around the contract to find right getStorageAt

Could this theoretically use ethereumjs-vm or the likes + storageAgainstBlockHash for SLOAD queries?

ReferenceError: Buffer is not defined

Hey I m using this package with react-native and i am facing this problem when i import something from this package like this
import {GetProof} from 'eth-proof';
it throw error is it this package was supported for react-native

Proof of absence

The proper way to deal with proof-of-absence, is to update the merkle-patricia-tree module. This is the next step. Correct behavior of that module for get() for an key who's value is undefined should be to return <buffer > because its the buffer representation of null.

Centralized RPC Providers

edit

fixed! infura now supports this

---

At time of this writing neither Infura nor any RPC provider's support eth_getProof, but infura should in the very near future. ETC chain supports the call iff using multigeth, but against no service central services are known to be running it.

Implications

getting storage Proofs and Account proofs wont work unless your RPC provider supports eth_getProof. Solution is to run geth/parity-ethereum/multigeth locally for those Additionally it needs to be a full or archive node if you want to get historic proofs.

use infura instead of localhost for tests

Is your feature request related to a problem? Please describe.

All the tests that currently use the eth_getProof method will not work unless you are running a full archive node. This is because they point to localhost, and they point to localhost because infura did not support the eth_getProof method (until recently).

Describe the solution you'd like

• change all references of localhost to https://mainnet.infura.io
• make sure all the tests (not the commented out ones) pass.

Additional context
when you're done. make a pull request. In the PR comments mention that this "Fixes#" (x being this issue number).

Why eth-proof can not work for current ethereum block transacion?

I test eth-proof with previous Ethereum block is fine, line 2018 year, but from now, it returns block hash mismatch? Is it due to ethereum changing the stand?

add support for logs

Resource temporarily unavailable Issue

Hi,

I was testing eth proof library to getAccountProof with a local chain setup.

Below is my code:
epObjectWithChainData = new EP(new Web3.providers.HttpProvider("http://127.0.0.1:9546"), blockHash, chainDataPath)

chainDataPath is local running geth geth/chaindata path.
epObjectWithChainData.getAccountProof(accountAddress).then(function(proof){
console.log("\n===========accountProofWithChainData===========\n", proof);
})

While running the code, it gives below error:
"OpenError: IO error: lock geth/chaindata/LOCK: Resource temporarily unavailable"

Any suggestion how to fix it?

Thank You
Abhay

add LICENSE.md

I see in your package.json has ISC. Could you add a LICENSE.md to the repo to make it more clear on github what the license is?