Questions tagged [checksum]

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How does EIP-55 prove a string is ACTUALLY a valid Ethereum address?

I wonder how EIP 55 check proves an address is actually an Ethereum address, or does it prove this at all? Am I missing an obvious point in Vitalik's code below from EIP 55? from ethereum import ...
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0answers
14 views

After generating Address, how to checksum it? [duplicate]

After generating address for example "0x8c1821a90ecce75ec2901633b2c9164cf9406b54" what is the algorithm to generate checksummed address to "0x8C1821A90EcCE75ec2901633b2c9164CF9406B54". Although, There ...
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2answers
18 views

web3js returns non-checksumed addresses!

Why does web3js 0.20.6 returns all-lowercase addresses on contract creation not a checksumed address?! How to deal with this trouble?
2
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1answer
216 views

Address checksum Solidity implementation

Looking at EIP-55, there are quite a few client-side address checksum implementations provided but no Solidity implementation. Are there any existing examples of computing address checksums directly ...
0
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1answer
204 views

What does Error: Provided address “1.2870172725867908e+48” is invalid, the capitalization checksum test failed

I have assigned my variables here > var contractAddress = 0xb5A5F22694352C15B00323844aD545ABb2B11028 > var cont = new web3.eth.Contract(abi, contractAddress) I am getting the error : ...
0
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1answer
47 views

Checksum vs. Hash: Differences and Similarities ? [closed]

What are similarities and differences between a "checksum" algorithm and a "hash" function? Can they be used instead of each other? Or their usage are different? For example, for verifying the ...
1
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1answer
5k views

How to fix checksum mismatch in downloaded node for Ethereum Wallet?

I attempted to update Ethereum Wallet to 1.8.2 and was given an error: Checksum mismatch in downloaded node! MD5: 308... Please install the geth node version 1.8.2 manually So I went to https://...
4
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1answer
3k views

Remix Warning: This looks like an address but has an invalid checksum

I have the following contract: pragma solidity ^0.4.13; contract Test { function test() public payable { address(0xCF5609B003B2776699EEA1233F7C82D5695CC9AA).call(1); } } The Remix ...
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4answers
5k views

What is the tool for address checksum?

I have an error from web3: Unhandled rejection Error: Given address "0x" is not a valid Ethereum address. My question is if is there any tool that can fix my address (add checksum).
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1answer
2k views

Is possible to check if a address belongs to an exchange?

Most of the exchanges do not accept utility tokens from a contract. Is there a way to validate/check if the target address is/belongs to a exchange?
2
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1answer
202 views

Checksum calculation for icap address

I am integrating the new coin, for this i need to create the ICAP address. In this address generation process, we need to generate the checksum, for this how i may create the checksum. example my ...
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2answers
1k views

Some characters in Ether addresses have changed to capitals after upgrading Mist

I recently upgraded Mist from 0.3.9 to 0.5.0. I have noticed that the capitalisation of some of the characters in my public address have changed. Is this normal?
4
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2answers
255 views

What's an “indirect ICAP address”?

The ethereum wiki has a specification of basic, direct and indirect ICAP addresses. Where the basic and the direct are well explained here and here, I have trouble to understand how indirect ICAP ...
3
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1answer
169 views

How strong are the checksums in Ethereum addresses?

2 options for Ethereum addresses which have checksums are ICAP and EIP55. Are there others? For each option, how strong are the checksums? What is the chance that a typing mistake (or mistakes) ...
57
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7answers
40k views

How can I check if an Ethereum address is valid?

I've read many times that you should never input an address by hand unless you want to accidentally send Ether into no-mans-land. I'd like to know what those checksums might be. Is there a way to tell ...
3
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1answer
173 views

What options are suitable for Ethereum addresses with checksums?

Since Ethereum addresses don't have checksums, should ICAP addresses (which do have a checksum) be proliferated? Or are there other options more suitable for the proliferation of checksummed ...
6
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1answer
2k views

What is an ICAP address?

It appears ethereum is using plain hexadecimal addresses like 0x0092e965928626f8880629cec353d3fd7ca5974f for now. I noticed, the ethereum C++ implementation outputs so called ICAP addresses, check ...
49
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4answers
13k views

Why don't Ethereum addresses have checksums?

A checksum, similar to its use in Bitcoin addresses, can primarily prevent mistyped or invalid addresses from being used, before a transaction with an invalid address is constructed. Why don't ...