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ethereum/ethereumj

Java implementation of the Ethereum protocol

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Repo info

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Jan 20 11:02

Travis ethereum/ethereumj#1290 errored (4066)
Aug 16 2019 07:24

Travis ethereum/ethereumj#1285 broken (4062)
Aug 13 2019 13:09

Travis ethereum/ethereumj (develop) canceled (4060)
May 06 2019 20:27

Travis ethereum/ethereumj@77c832e (patch/abi) passed (4052)
Apr 15 2019 04:52

Travis ethereum/ethereumj#1275 still failing (4050)
Apr 14 2019 21:00

Travis ethereum/ethereumj#1275 still failing (4049)
Apr 09 2019 11:55

Travis ethereum/ethereumj (1.12.0) passed (4048)
Apr 09 2019 10:49

Travis ethereum/ethereumj (master) passed (4045)
Apr 09 2019 09:36

Travis ethereum/ethereumj (master) canceled (4044)
Apr 06 2019 06:27

Travis ethereum/ethereumj (feature/solc-0.5.x) broken (4041)
Apr 03 2019 01:27

Travis ethereum/ethereumj#1274 broken (4040)
Apr 03 2019 01:18

Travis ethereum/ethereumj#1273 broken (4039)
Apr 01 2019 12:03

Travis ethereum/ethereumj@2f1f82d (fix/create-revert) passed (4034)
Apr 01 2019 05:41

Travis ethereum/ethereumj (feature/solc-0.5.x) passed (4032)
Mar 30 2019 18:45

Travis ethereum/ethereumj@9c656b7 (fix/ropsten-revert) passed (4030)
Jan 31 2019 16:39

sunyaojin edited #1259
Jan 31 2019 16:38

sunyaojin commented #1259
Jan 31 2019 16:38

sunyaojin commented #1259
Jan 31 2019 14:43

sunyaojin opened #1259
Jan 29 2019 09:04

fjfd forked
fjfd/ethereumj

Michael Sole

@michaelxzibit_gitlab

@michaelxzibit_gitlab
start from this code:
https://github.com/ethereum/ethereumj/blob/develop/ethereumj-core/src/main/java/org/ethereum/sync/SyncPool.java#L265-L285
next here:
https://github.com/ethereum/ethereumj/blob/develop/ethereumj-core/src/main/java/org/ethereum/net/rlpx/discover/NodeManager.java#L322-L346
node table is filled and updated with fresh info using asynchronous tasks, start from this code:
https://github.com/ethereum/ethereumj/blob/develop/ethereumj-core/src/main/java/org/ethereum/net/rlpx/discover/DiscoveryExecutor.java#L36-L45

very much appreciated

kerolosss

@kerolosss

Hi all I am just new I tried to find free material for smart contracts with solidity and web3.js so I am glad to hear your advice

Anett Rolikova

@anettrolikova

@kerolosss Hi Kerolosss, have you looked at ethereum.org website? There are bunch of links and resources for learning https://ethereum.org/developers/

kerolosss

@kerolosss

@anettrolikova Hi Anett , I am just all I got a free course from coursera but I couldn't get from it so yes I will try for it and also a game called cryptoZombies ... but thanks for your help

chosenegbe

@chosenegbe

Hi
From the source file, the p2p protocol picks nodes from the Kademlia table for establishing a new TCP connection based on the node total difficulty and maybe reputation. It is possible I'm mistaken, but I don't see any implementation of the Kademlia table. My question is why defined a complex data structure and not utilize it? If we are merely selecting nodes based on difficulty and reputation, why not just put the nodes in an array list? Or is the Kademlia table meant for 2.0 with shards?

Ren

@RemoteRen

hi, is it possible to open and parse an existing geth or parity database with this library?

Dmitry S.

@zilm13

@RemoteRen no, every client has its own format

the fastest way to transfer data is sync, it should sync with other client even without internet

Ren

@RemoteRen

@zilm13 thank you!

Michael Sole

@michaelxzibit_gitlab

hi, plz how is the number of inbound and outbound connections determined in EthereumJ?

Grucha8

@Grucha8

Hi, i'm trying to make a small private network using ethereumj. My setup is: 1 miner, 2 regular nodes. I am using PrivateMinerSample for miner node and PrivateNetworkDiscoverySample for the other two nodes. They all find each other and update their blockchain state but when i want to send a transaction from one node to another the transaction isn't added to any of the block despite sender having enough founds and gasPrice being good (no error in logs). My question is if i made something wrong with config files (miner node should not have peer discovery?)

recordins

@recordins

Hi take a look at recordins.com if you want to create a private network based on ethereumj

Aniket Tikone

@annytikone

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

sky_stone

@superYuanC

hello~~

Aniket Tikone

@annytikone

hey

Mikhail Kalinin

@mkalinin

hello @superYuanC @annytikone !

Aniket Tikone

@annytikone

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

Mikhail Kalinin

@mkalinin

do you want to sync balances of all the tokens that particular address does own?

You would need to know a list of all token contracts and trigger balanceOf method. To get this list you have to scan transaction receipts starting from the beginning of the chain and check whether given address is a part of Logs related to token transfers.

Aniket Tikone

@annytikone

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

yeeacksonideo

@yeeacksonideo

Is randao implemented in Ethereum using smart contracts?

hmunnin

@hmunnin

hey guys! does anyone know is there any compatibility between pkcs12 and pkcs7 key formats ?

yanyanho

@yanyanho

hello, I see zksnark code in ethereumJ, are there some tests code or exanple for beginner to run ?

/all

Mikhail Kalinin

@mkalinin

@annytikone

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

You need a fully synced node and then use Web3j to run log queries with your address in topics related to the events of contracts targeted by your search. Log query https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getlogs

Mikhail Kalinin

@mkalinin

@yeeacksonideo

Is randao implemented in Ethereum using smart contracts?

There is a contract-based implementation here https://github.com/randao/randao. And there is an implementation built in a Beacon Chain: https://github.com/ethereum/eth2.0-specs/blob/dev/specs/core/0_beacon-chain.md#randao

Once two way bridge between Eth1 and Eth2 is built this randao source could be used in Eth1.

@hmunnin googled it, https://knowledge.digicert.com/generalinformation/INFO4448.html

Mikhail Kalinin

@mkalinin

@yanyanho

I see zksnark code in ethereumJ, are there some tests code or exanple for beginner to run ?

Look into these tests https://github.com/ethereum/tests/tree/develop/GeneralStateTests/stZeroKnowledge
https://github.com/ethereum/tests/tree/develop/GeneralStateTests/stZeroKnowledge2

They are implemented in EthereumJ code as a part of test suite implementation https://github.com/ethereum/ethereumj/blob/develop/ethereumj-core/src/test/java/org/ethereum/jsontestsuite/GitHubStateTest.java#L264-L272

yanyanho

@yanyanho

thank you very much! @mkalinin

apxde

@apxde

How can control coins?

Dirk Jäckel

@biafra23

Since EthereumJ is deprecated. Is there another JVM based Ethereum client that is not deprecated? I understand that Pantheon is now called Hyperledger Besu. Is that my best bet?

Evan Saulpaugh

@esaulpaugh

I suppose so. Harmony was deprecated too I think

Dirk Jäckel

@biafra23

@esaulpaugh Thanks!

Evan Saulpaugh

@esaulpaugh

if you're doing anything with RLP or ABI check out https://github.com/esaulpaugh/headlong (mine)

Dirk Jäckel

@biafra23

:eyes:

Mikhail Kalinin

@mkalinin

@biafra23 depending on the case you may choose from a following list: Besu, Kethereum, Web3j.

Dirk Jäckel

@biafra23

:eyes: :+1:

Mikhail Kalinin

@mkalinin

As you all know, EthereumJ isn't maintained anymore and, for security reasons, we no longer recommend using it in production.
There are many viable Ethereum clients you can use: https://github.com/ethereum/wiki/wiki/Clients,-tools,-dapp-browsers,-wallets-and-other-projects
If you want to continue using a Java client, we'd recommend the client we are currently building; Hyperledger Besu (https://besu.hyperledger.org/). Feedback, PRs and suggestions are always welcome in the github repo: https://github.com/hyperledger/besu .