ethereum/light-client

https://github.com/zsfelfoldi/go-ethereum/wiki/Geth-Light-Client

Nick Savers

@nicksavers

@smcsicardi My node is currently serving 176 light clients. But I'm not aware how many Light Serving nodes are out there.

Sebastian Sicardi

@smcsicardi

Well that's a good start

tur1008

@tur1008

I am learning about a new project in China, I would like to ask you to help analyze it.

julianlen

@julianlen

Hi ! I want to debug the way that geth light client deploys and executes a contract. I am running a light node in testnet, and developed a smart contract with truffle. What is the node port i should use with truffle ?

CounselorBlockchain

@CounselorBlock1_twitter

Greetings to all, I am writing a blog to tell the importance of ETH to the world, would anyone like to know?

Nick Savers

@nicksavers

@CounselorBlock1_twitter this might not be the right channel. This is for discussing the light client protocol and clients.

erchuan.ma

@jiyilanzhou

Hello everyone, we're recruiting evangelists, researchers, developers. You can use your free time to participate in. It's a cross chain payment project. The innovation of the project is the design of syner chain and interactive chain, hotstuff consensus, smart virtual machine based on wasm, on chain governance, a production chain framework. Here, you'll start this project from scratch, and let's change the world together。
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Pierre-Alain

@paouvrard

Hello, i was wondering if someone could recommend a light client that is safe to use in production ? (I need a light and reliable data source of contract storage roots) Thank you!

Dominic Letz

@dominicletz

This is still a big issue, right now 99% of everyone is just using centralized https servers such as from infura

The only secure super light client is based on the BlockQuick paper https://eprint.iacr.org/2019/579.pdf and we're still working on the implementation of that

Pierre-Alain

@paouvrard

Thank you, what about the "light" options on geth and parity ?

Pierre-Alain

@paouvrard

Ill clarify: do the existing "light" options connect to centralized services ? What i need is to sync block headers from the network so that i can have full confidence to be on the longest chain and that the header's state root is valid. (Then ill handle getting merkle proofs separatly)

Aniket Tikone

@annytikone

how can i fetch all the tokens from ethereum network to my wallet ?using web3js(nodejs) or web3j(java)?

Aniket Tikone

@annytikone

I would like to crawl an Ethereum network completely,is there any way?

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@rossy0309

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RohanKeskar

@RohanKESKAR_18_twitter

How can we use whisper in light-client??

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@fanclub14204816_twitter

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Boky

@bokysan

Hello everyone,

I'm having an issue with truffle and geth light. I'm running into the issue No trusted canonical hash trie when running truffle console --network staging against this node and I'm kind of stuck. Any help debugging the issue further would be greatly appreciated.

Only thing online is thi StackOverflow post about this but no responses yet: https://ethereum.stackexchange.com/questions/59825/running-a-geth-light-client-how-do-i-resolve-the-error-no-trusted-canonical-h

The node is running with the following parameters:
/usr/local/bin/geth --rpc --rpcaddr 0.0.0.0 --ws --wsaddr 0.0.0.0 --graphql --graphql.addr 0.0.0.0 --nousb --syncmode light --rinkeby --lightkdf --rpcvhosts=*

The following happens in geth log:

INFO [03-29|07:58:25.474] Imported new block headers               count=1    elapsed=620.201µs number=6220969 hash=4d267d…dc2573
INFO [03-29|07:58:40.042] Imported new block headers               count=1    elapsed=600.209µs number=6220970 hash=4a3be7…9bd67b
INFO [03-29|07:58:55.217] Imported new block headers               count=1    elapsed=76.661ms  number=6220971 hash=9f5639…4b32ca
WARN [03-29|07:58:58.246] Served eth_getBlockByNumber              conn=100.107.171.249:45168 reqid=475598505316387 t=9.694417ms err="no trusted canonical hash trie"
WARN [03-29|07:58:58.697] Served eth_getBlockByNumber              conn=100.126.163.153:36200 reqid=475598505316388 t=188.878µs  err="no trusted canonical hash trie"

This is truffle output:

truffle console --network staging                                                                                                                          4409ms
truffle(staging)> Error: no trusted canonical hash trie
    at /Users/.../blockchain/node_modules/@truffle/hdwallet-provider/node_modules/web3-provider-engine/subproviders/provider.js:18:36
    at XMLHttpRequest.request.onreadystatechange (/Users/.../blockchain/node_modules/web3-providers-http/src/index.js:96:13)
    at XMLHttpRequestEventTarget.dispatchEvent (/Users/.../blockchain/node_modules/xhr2-cookies/xml-http-request-event-target.ts:44:13)
    at XMLHttpRequest._setReadyState (/Users/.../blockchain/node_modules/xhr2-cookies/xml-http-request.ts:219:8)
    at XMLHttpRequest._onHttpResponseEnd (/Users/.../blockchain/node_modules/xhr2-cookies/xml-http-request.ts:345:8)
    at IncomingMessage.<anonymous> (/Users/.../blockchain/node_modules/xhr2-cookies/xml-http-request.ts:311:39)
    at IncomingMessage.emit (events.js:328:22)
    at IncomingMessage.EventEmitter.emit (domain.js:485:12)
    at endReadableNT (_stream_readable.js:1201:12)
    at processTicksAndRejections (internal/process/task_queues.js:84:21)

Njoku Emmanuel

@NjokuEm78623074_twitter

Hello everyone out there!

Abhishek Kumar

@kuabhish

Hello everyone ,

I need help to get started with go ethereum on aandroid

android**

like -- conecting to smart contract , wallet etc

Boykroland

@Boykroland1_twitter

Hi everyone

Any bounty available??

Chris Hobcroft

@chrishobcroft

Hey all, I'm seeing a load of WARN when running geth -rinkeby -rpc -rpcapi eth,net,web3 --syncmode "light" on 1.9.13-stable

WARN [04-22|12:07:01.574] Served eth_getBlockByNumber              conn=127.0.0.1:55380 reqid=19 t=224.274µs err="no trusted canonical hash trie"
WARN [04-22|12:07:05.776] Served eth_getBlockByNumber              conn=127.0.0.1:55222 reqid=23 t=178.691µs err="no trusted canonical hash trie"
WARN [04-22|12:07:06.574] Served eth_getBlockByNumber              conn=127.0.0.1:55380 reqid=20 t=103.525µs err="no trusted canonical hash trie"
WARN [04-22|12:07:10.776] Served eth_getBlockByNumber              conn=127.0.0.1:55222 reqid=24 t=181.235µs err="no trusted canonical hash trie"
WARN [04-22|12:07:11.575] Served eth_getBlockByNumber              conn=127.0.0.1:55380 reqid=21 t=233.229µs err="no trusted canonical hash trie"

Transactions are still being published successfully, but can someone help me understand what this WARN means, and how I eliminate it?

julianlen

@julianlen

Hi guys! Is there any documentation about parity's light client sync ?

AtomicLemon

@AtomicLemon

Does anyone have a list of peers?

Hey all, I'm seeing a load of WARN when running geth -rinkeby -rpc -rpcapi eth,net,web3 --syncmode "light" on 1.9.13-stable

WARN [04-22|12:07:01.574] Served eth_getBlockByNumber              conn=127.0.0.1:55380 reqid=19 t=224.274µs err="no trusted canonical hash trie"
WARN [04-22|12:07:05.776] Served eth_getBlockByNumber              conn=127.0.0.1:55222 reqid=23 t=178.691µs err="no trusted canonical hash trie"
WARN [04-22|12:07:06.574] Served eth_getBlockByNumber              conn=127.0.0.1:55380 reqid=20 t=103.525µs err="no trusted canonical hash trie"
WARN [04-22|12:07:10.776] Served eth_getBlockByNumber              conn=127.0.0.1:55222 reqid=24 t=181.235µs err="no trusted canonical hash trie"
WARN [04-22|12:07:11.575] Served eth_getBlockByNumber              conn=127.0.0.1:55380 reqid=21 t=233.229µs err="no trusted canonical hash trie"

Transactions are still being published successfully, but can someone help me understand what this WARN means, and how I eliminate it?

Also this is because someone is accessing your geth endpoint API. Try use a firewall to restrict it so only you can use it

Mudassir Ahmad

@ahmadkureshi

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xpayserver

@xpayserver

Hi, is there an updated list of peers I could use to connect my light geth node to? I have been stuck with 0 peers for a long long time.

Rocky Fikki

@rfikki

@xpayserver mainnet lightclient https://gist.github.com/rfikki/e2a8c47f4460668557b1e3ec8bae9c11

@AtomicLemon Rinkeby lightclient: https://gist.github.com/rfikki/589c290f400a563c2bce872b2648bdeb

@evertonfraga

i have @rfikki list of peers favorited on my browser 😅

Rocky Fikki

@rfikki

@evertonfraga , funny. lol

agatsoh

@agatsoh

I am trying to run light client locally using these nodes
https://gist.github.com/rfikki/e2a8c47f4460668557b1e3ec8bae9c11
geth is not syncing any ideas ?

The command i use
geth --syncmode light --maxpeers 0 --http

Rocky Fikki

@rfikki

max peers 0?

agatsoh

@agatsoh

@rfikki I could get it working. I added maxpeers 0 because there was a comment regarding that on the gist. But all good.
It took a long time to connect with peers though

Subik Shrestha

@sssubik

Hey can I use a light client to invoke a smart contract function from the backend by providing private keys and not from wallet?

multisiglab

@multisiglab_twitter

Hi guys, we have a huge problem, our clients so angry. We can not make bunch withdrawal due to problems with our Geth nodes, please help us.

Light node is constantly looking for peers and has peercount=0, even if we add peers manually by admin.addPeer(), it doesn’t work, admin.peers empty. How it could be resolved?

Geth 1.9.17 version (and 1.9.16 has the same issues)

@evertonfraga

there aren’t enough light servers on the network, so light clients tend to be without peers.

multisiglab

@multisiglab_twitter

thank you for useful response!

my team says sometimes it happen with full node also

multisiglab

@multisiglab_twitter

Hi everyone, can you help me understand please, is the LES implementation compatible with PLP? I mean is the parity node can serve geth light node?

@evertonfraga

they are different protocol implementations, with different identifiers: “les/2” vs “plp/1”

https://github.com/ethereum/devp2p/blob/master/caps/pip.md for more

multisiglab

@multisiglab_twitter

thanks a lot!

Adam Ryczkowski

@adamwam_gitlab

Since servers willing to speak LES are scarce, what are my options to commit basic transactions on ETH main net without trusting 3rd party?

Adam Ryczkowski

@adamwam_gitlab

I believe I found the solution. geth --syncmode "light"connects successfully (in contrast to the deprecated Fether), and so I can use: https://support.mycrypto.com/developers/run-your-own-node-with-mycrypto

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