Questions tagged [json-rpc]
json-formatted remote procedure calls to communicate with ethereum clients
466
questions
0
votes
1answer
14 views
Receiving unexpected JSONRPC requests on my website
I have a production website (nothing about blockchain or related) and I a received hundreds of POST request to "/" with these params.
Obviously my server raise an error because it doesn't know how to ...
1
vote
1answer
26 views
Infura getLogs returns an empty result
I'm writing a crypto based system with PHP on Infura, and now I am coding a script to retrieve logs for a specific address. This is my code:
$ch = curl_init($my_server_url);
$data = array(
'...
2
votes
0answers
13 views
Calculated blockhash of PoA block mismatches with actual blockhash returned by RPC
I set up a Demo PoA chain using Parity Etheruem. I sent some transactions to it and it started producing blocks. A block on my demo PoA chain was generated with block hash ...
1
vote
1answer
28 views
How to guarantee the order of transactions in MetaMask?
I create my transactions with ethers.js and push them into an array like this:
const promises = [];
promises.push(createTokenApprovalTx());
promises.push(createFooTx());
It's important that the ...
1
vote
1answer
50 views
transactions in rpc block response sometimes have chain null and sometimes correct chain
when doing e.g. a blockByNumber rpc request I am getting a result like this from parity:
https://gist.github.com/ligi/fbc7061d93f087cf0eb0f4db83d1fced
what is puzzling me that some transactions have:
...
0
votes
1answer
16 views
What is the client version?
I am using Infura and web3.py. When I connect to Infura the web3 object has a clientVersion property that reads this from JSON RPC
"Geth/v1.8.15-omnibus-255989da/linux-amd64/go1.10.1"
Can someone ...
1
vote
0answers
75 views
Curl Request Java - How To
I am looking to use some of the management admin API's found here: https://github.com/ethereum/go-ethereum/wiki/Management-APIs but unfortunately, the web3j library does not support the calls that I ...
1
vote
1answer
24 views
TxPool on Ganache
I started using Ganache to run Ethereum and tried via cURL the following:
curl -X POST -d '{"jsonrpc":"2.0","method":"txpool_status","params":[],"id":1}' http://ip:port
But I got the message:
...
1
vote
1answer
19 views
eth_getStorageAt params names
I am calling geth rpc method eth_getStorageAt using json-rpc-cpp libarary. I need to know the parameters' names for the method. I can find parameters' names for eth_sendTransaction from here, which ...
0
votes
0answers
11 views
hwo to identifie error from transaction error object?
is it possible to know what is the reason of transaction error from "error" object (nonce, insufficient fund ..)
is there status or something to test using it ?
Geth error message is generic, I ...
0
votes
1answer
30 views
How a json-rpc client can tell that a transaction it's sent has been rejected?
Judging from https://github.com/ethereum/wiki/wiki/JSON-RPC
the api client can synchronize on events such as:
Transaction is received/pending: eth_gettransactionbyhash returns non-null with block ...
0
votes
0answers
18 views
Calling a string from smart contract in go
all I want to do is call a string from a smart contract I've written using go.
My smart contract is:
pragma solidity ^0.4.24;
contract String {
string store = "abcdef";
function getStore() ...
0
votes
1answer
17 views
JSON-RPC: TheDao contract returning not null values for not existing methods in the contract
When using the geth JSON-RPC eth_call to retrieve some ERC20 token contracts symbol and name information, it comes up the case of TheDao contract.
I was expecting to receive a null/empty string like ...
1
vote
0answers
21 views
Inconsistent responses with 'eth_getTransactionByHash' through RPC API. Can anyone help?
I have been using the requests library with python to query the geth/rpc api in order to get ETH transaction data. I connected to geth via "geth --rpc --unlock TESTINGADDRESSWITHNOVALUE --allow-...
0
votes
1answer
35 views
Pending transactions not mined in private network
I have created a node with the following genesis block:
{
"config":{
"chainId":9119,
...
1
vote
2answers
228 views
How to check Ethereum smart contract info?
I want to know 3 things:
Is an address a smart contract?
Is this smart contract an ERC20 or ERC721 token?
Is the Solidity code public?
0
votes
1answer
22 views
View sendTransaction implementation
I'd like to see code that implements getAccounts and sendTransaction in a provider.
I tried digging into the Metamask source code and found the line where Metamask supplies the Web3 provider, but I ...
0
votes
1answer
18 views
How to get initial balances for all those who bought tokens?
Is it possible to get the initial balances for all those accounts who bought ERC20 tokens? If that’s possible, how that can be achieved?
I’m wondering if there is any way of getting that information ...
1
vote
2answers
51 views
Get All Contracts from Blockchain
I am developing a large database of exploitable contract addresses and creating a website to host such a database for users to use to see if contracts are safe.
Is there a way to get all contract ...
0
votes
0answers
13 views
What are the steps I have to perform to make a transaction using for ETC using Kotti Testnet geth JSON RPC APIs?
I've founded API resource from Resource, and from that resource I've got This reference, which redirected me to all those JSON RPC methods and localhost geth
port and its setup.
What should I have ...
0
votes
1answer
28 views
Is it possible to use address you don't own while running ethereum RPC node (using geth)?
In other words, you start your own node and then somehow add accounts you don't own (aka - you don't have their private keys)?
I'm asking because I wanted to make my own node exposed via RPC/...
0
votes
1answer
38 views
Can I expose geth's rpc ONLY to Metamask connections?
I am building a private chain and rpcaddr is set to 0.0.0.0But recently I found out that this private chain has been attacked by a foreign IP, it kept trying to transfer those worthless ether out from ...
2
votes
1answer
17 views
How is the length of the message counted when calling eth_sign?
According to https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign
The sign method calculates an Ethereum specific signature with:
sign(keccak256("\x19Ethereum Signed Message:\n" + len(message) +...
0
votes
0answers
26 views
invalid JSON RPC when using custom domain name
geth --testnet --networkid 3 --syncmode "fast" --datadir "." --cache=2048 --rpc --rpcport 8545 --rpcaddr example.ropsten.hk --rpcvhosts example.ropsten.hk --rpccorsdomain "*" --rpcapi="web3,miner,...
1
vote
2answers
54 views
“Gas estimation failed” on Ropsten with Invalid RPC JSON
I'm running into an issue going through a basic example in "Mastering Ethereum"...
I have a Faucet contract (on Ropsten) per the book that looks like...
pragma solidity ^0.5.1; //mastering ethereum ...
0
votes
1answer
101 views
How Do You Parse Web3 Retuned JSON Objects of Events?
I am using Web3 1.0 to listen to events from a contract like this:
tokenContract.events.AddressList({
fromBlock: 6020474,
toBlock: 'latest'
},
(error, events) => {
...
1
vote
1answer
31 views
How to add a custom JSON-RPC endpoint to geth?
I'm building an Ethereum private network and I want to make a custom JSON-RPC endpoint.
I've been customizing and adding some things in the go-ethereum source code but I don't know yet where to look ...
0
votes
0answers
23 views
Why is the filter ID different ganache-cli and geth
request
{"jsonrpc":"2.0","method":"eth_newFilter","params":[{"topics":["0x100791de9f40bf2d56ffa6dc5597d2fd0b2703ea70bc7548cd74c04f5d215ab7"]}],"id":0}
ganache-cli`s response
{"jsonrpc"='2.0', "id"=...
1
vote
2answers
117 views
How to get the miner address of a block with infura Rinkeby endpoint?
I've read some docs online that to get the miner/sealer/signer address of a particular block that runs with the Ethereum PoA/Clique consensus (the Rinkeby testnet for example), I need to call the ...
0
votes
0answers
24 views
How to enable and use the accounting module?
I found the accounting module in this line and want to use them.
i attached the accounting module to parameter --rpcapi accounting when run console node but could not found this module.
run node:
....
1
vote
0answers
16 views
I want to make multi-node , not private network
I know how to make multi-node in private network,
but I have a question how to make a multi-node with other machines.
this picture shows independent two nodes, and you can see blank on admin.peers
...
0
votes
1answer
104 views
Uncaught TypeError: web3.eth.Contract is not a constructor
For whatever reason, when I attempt to set an instance of a contract in a javascript file, I get the following message in my console:
Uncaught TypeError: web3.eth.Contract is not a constructor
At ...
1
vote
1answer
367 views
Sending Tether USDT via RPC JSON API call
I'm trying to send Tether using JSON RPC API via 0xdac17f958d2ee523a2206206994597c13d831ec7 contract.
I've tried to cases:
From simple ETH wallet
From ETH wallet, which has only USDT
This is what ...
0
votes
1answer
117 views
JSON RPC-HTTP API have any sort of rate limiting or throttling?
Is there any sort of rate limiting on the RPC-HTTP API? Trying to track down why my node (private chain) can only handle ~40 requests per/second. I am only load testing it with eth_blockNumber so they ...
0
votes
1answer
32 views
Do smart-contracts work as APIs?
Is it possible to put a smart contract "behind" a restful API, i.e. expose my contract functions and properties through restuful API where I can make RPC to it?
Or does it work as an API already, but ...
0
votes
0answers
109 views
sendRawTransaction insufficient funds while there is enough balance
Sorry I probably create a topic that was answered multiple times but unfortunately I couldn't find a solution. I'm trying to use RPC server of Geth to send a raw transaction. I've an address with a ...
0
votes
2answers
383 views
Infura Request Limitations
Are there any official information about request limitations? I know for example that there is a limit for the amount of results in getLogs: https://infura.io/docs/ethereum/json-rpc/eth_getLogs
...
2
votes
1answer
114 views
How to find the Bytecode of Ethereum Smart Contract by just it's address using JSON RPC
I am wondering that is there any way to find the byte-code of the Smart Contract which is published on a blockchain just by having only idea about it's contract address using JSON RPC running at 8545 ...
0
votes
0answers
91 views
“Method not found” when trying to parity_subscribe to eth_getFilterChanges
Parity Ethereum version: 2.5.1-beta, tested on 2.4.6 as well
Operating system: Linux (Ubuntu)
Installation: binary
Fully synchronized: yes
Network: ethereum
Restarted: yes
I'm using a websocket. I ...
0
votes
2answers
51 views
Is there any way to scale geth (or any client) API Layer to query a single node?
as title suggest, what I'm trying to do is to have multiple "app" that expose Json RPC endpoints, like get_balance, get_block / eth_getBlockByNumber / eth_getBlockByHash, so I need to read a full node,...
1
vote
1answer
135 views
How create transaction raw data for using “eth_sendRawTransaction” in C#
My IoT device connects to another computer via Wi-Fi on which Ethereum (Truffle/Ganache) is running which receive a RPC from the IoT.
My task is to create raw transaction data on this IoT Device, so ...
1
vote
1answer
31 views
Fetching block template from node
The most famous opensource pool uses eth_getBlockByNumber method with parameter "pending" to get block template and generate jobs from it. But now, in parity, I found that this parameter is deprecated ...
0
votes
0answers
17 views
How to communicate with private geth chain using IPC?
There are many examples on how to send a transaction(in JSON) via http or ws to a geth node, how do you send a json transaction via IPC? I have not been able to find a single example that shows how to ...
1
vote
1answer
204 views
How can I create an array of objects of a specific smart contract in solidity?
I am developing a university management system using ethereum. So,for that I need an entity "Student" and I have created a smart contract with some basic functionalities. Here is my code snippet for ...
0
votes
0answers
39 views
Send ETH on Command Line with Parity
How do you send ETH on the command line with Parity?
I am trying this on a node running Parity 2.4.5:
curl -H "Content-Type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"...
0
votes
1answer
123 views
how can i translate JSON RPC API for curl into a http://… address [closed]
I have access to a private chain Ethereum node that is accessible via http https://sustainability-chain.info (e.g. i can access it with metamask using special RPC and networkid 20030117
Based on ...
1
vote
0answers
102 views
How to use 'geth attach' with Infura?
I have a project in Infura and the project ID is 6f...3a. I'm having problem to start geth attach process with Infura.
I tried all protocols (http, https, ws and wss) but all failed.
Did I miss ...
0
votes
1answer
61 views
web3.js - cannot interact with smart contract
I want to write a simple js script. I follow many tutorial available from Youtube, forums and website but i seem that i cannot interact from the smart contract. i can interact it from remix. btw the ...
2
votes
4answers
217 views
Replacement for Infura site
I have been using Infura site for accessing main Ethereum network, but newly this site has changed its services and don't service send methods.
I searched a little and found Quicknode site, but ...
0
votes
0answers
15 views
Which kind of error does LOG15 in Ethereum-geth client is about? i always encounter it when When unmarshalling msg.data()
I marshal a struct locally, and then send the marshaled data to ethereum geth client. But when i unmarshal it in geth , i always meet a log15 error. I have explored it for a long time, but didn't ...
