Questions tagged [decoding]
The decoding tag has no usage guidance.
14
questions
1
vote
1answer
61 views
How to decode a raw transaction in Python?
I have a raw_tx in hex format which I'm going to broadcast via eth_sendrawtransaction JSON-RPC method.
I want to check this raw_tx by decoding it on fields: gas, gas_price, nonce, value, etc.
Some ...
0
votes
1answer
21 views
Where does the length parameter end and the actual string start in an abi encoded string?
Assuming I decided to ABI encode a very long string (for the purpose of this question I just picked an arbitrary 5-paragraph lorem ipsum text generate by https://www.lipsum.com/feed/html) and get out ...
2
votes
2answers
51 views
How to decode a transaction to verify its signature in Javascript?
I noticed that it's possible to sign a transaction with a wrong private key. I took the following example found at https://github.com/ethereumjs/ethereumjs-tx
const EthereumTx = require('ethereumjs-...
1
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0answers
30 views
Given just an Etheruem address, is there any way to tell if it's an ERC20 and/or an ERC721
If I have only an Ethereum address and only a locally running node (using a third party such as EtherScan or Alethio is cheating), is there any way to tell if that address is an ERC20 or an ERC721 ...
0
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0answers
15 views
Calling decodelog with dynamic number of arguments
the number of input arguments is dynamic, how can I decode many log by one?
this is all i tried to do
for (let n = 0; n <= receipt.logs.length-1; n++) {
if(event.code === receipt.logs[n]....
0
votes
1answer
33 views
Is Ethereum block header a list?
Decoding a RLP encoded block using Eth specifications do we get header as list? But as per format i.e., [[blockHeader,transactionList,uncleList],totalDifficulty], blockHeader should have been string.
...
1
vote
1answer
178 views
RLP decoding for a list
in many standard documentation and many blogs, I have found the example for list with two strings like below
[“cat”, “dog” ] -> C8 83 636174 83 646F67
and thats how it is decoded
1) Retrieve the ...
1
vote
1answer
106 views
Quorum how to decode result returned by eth_getQuorumPayload api?
I've read the post How to get decrypted transaction data in quorum?
I followed the api document and got the result by calling eth_getQuorumPayload
curl -H "Content-Type: application/json" -X POST ...
1
vote
1answer
175 views
Encoded input params
I created a simple test contract with a single method:
pragma solidity ^0.4.24;
contract SimpleTest {
function testFunc(string name, bool isFirst) public {
//do stuff
}
}
I'm ...
1
vote
0answers
202 views
How to decode Tx data? Online tool?
Is there a fast way to decode the data returning from a Smart Contract call? I know there are github projects with JS libraries to decode this kind of data (such as https://github.com/ConsenSys/abi-...
asked Jan 23 '19 at 9:28
Juan Ignacio Pérez Sacristán
2,7633 gold badges27 silver badges60 bronze badges
1
vote
1answer
145 views
Anyone with knowledge in org.web3j.abi.Type Decoder?
I am trying to decode a String with this code that I found but I have not been able to do it.
String to = inputdata.substring(10, 74);
String value = inputdata.substring(74, 138);
Method refMethod = ...
1
vote
0answers
322 views
How to decode the input data in java?
I receive the input data as the image shows. And when I try to decode it with the method:
String inputdata = null;
Optional<Transaction> tx = web3.ethGetTransactionByHash(txHash).send()....
2
votes
1answer
898 views
How to unpack/decode parameters encoded with web3.eth.abi.encodeParameters in Solidity?
My client app (nodejs) packs some arguments to pass to a smart contracts as bytes _data (similar to ERC223 calls with fallback). I pack the arguments in my JS client like this:
const packedArgs = ...
14
votes
2answers
4k views
How can I easily parse a raw transaction?
In the Bitcoin ecosystem, there are tools like https://blockchain.info/decode-tx to decode a raw transaction. Is there a site that offers the equivalent for Ethereum?
I'm looking for an easy way to ...
