CryptoCoinsInfoClub.com

Ethereum Address Vs Contract Address

2 Answers - What Does 'do Not Send Eth Directly To An Ethereum Contract' Mean (on Coinbase)? Is It The Same As Not Sending It Directly To A Contract Address? - Quora

2 Answers - What Does 'do Not Send Eth Directly To An Ethereum Contract' Mean (on Coinbase)? Is It The Same As Not Sending It Directly To A Contract Address? - Quora

No theres a difference between a smart contract and an Ethereum address. Generally they mean that they dont support third party tokens, because for that you usually need a native wallet in order for it to work. Just only use ETH and not any of the smart contracts / tokens built on top of ETH and you should be fine :) Continue reading >>

How Do I Know If I Have An Eth Contract Address For An Out Of Gas Error?

How Do I Know If I Have An Eth Contract Address For An Out Of Gas Error?

How do I know if I have an ETH contract address for an Out Of Gas error? Why did this happen? If you see an error on Et herscan inregards to an auto-return or exchange from ShapeShift that reads "Out Of Gas", we need to manually resend the funds to you. We will ask that you provide an ETH wallet address that does not have contract restrictions. There was an error sending the ETH / ETH Token, because the specified receiving address or return address was an ETH contract address. The contract address provided requires more gas than we typically use to send ETH which is why this failed with an error of out of gas. We will manually push the ETH / ETH Token back to you. All we need you to do is send us an ETH address that is not a contract address and does not have contract restrictions. You can provide us this information in your customer support ticket . How do I know if my ETH Wallet Address is a Contract Address? If you are unsure if the address you have is a contract address, you can locate this information by searching the wallet address on Etherscan . If the ETH address has restrictions, the top left side of the web page will read "Contract Address" followed by the address. If it does not have restrictions, it will read "Address", followed by the address on the top left side of the web page. Once you have determined that you have an ETH address that is not a contract address, deliver this information to your agent. Your agent will then queue your order for a manual resend of the ETH / ETH Token. You will receive an email notification when the funds have been returned to the wallet address that you provided the agent. If you have any other questions about this topic, please leave a comment or ask your agent within your customer support ticket. Continue reading >>

An Introduction To Ethereum And Smart Contracts: A Programmable Blockchain

An Introduction To Ethereum And Smart Contracts: A Programmable Blockchain

An Introduction to Ethereum and Smart Contracts: a Programmable Blockchain Bitcoin took the world by surprise in the year 2009 and popularized the idea of decentralized secure monetary transactions. The concepts behind it, however, can be extended to much more than just digital currencies. Ethereum attempts to do that, marrying the power of decentralized transactions with a Turing-complete contract system. In this post we will take a closer look at how Ethereum works and what makes it different from Bitcoin and other blockchains. Read on! In our previous post , we took a closer look at what blockchains are and how they help in making distributed, verifiable transactions a possibility. Our main example was Bitcoin: the world's most popular cryptocurrency. Millions of dollars, in the form of bitcoins, are traded each day, making Bitcoin one of the most prominent examples of the viability of the blockchain concept. Have you ever found yourself asking this question: "what would happen if the provider of this service or application disappeared?" If you have, then learning about Ethereum can make a big difference for you. Ethereum is a platform to run decentralized applications: applications that do not rely on any central server. In this post we will explore how Ethereum works and build a simple PoC application related to authentication. A blockchain is a distributed, verifiable datastore. It works by marrying public-key cryptography with the nobel concept of the proof-of-work. Each transaction in the blockchain is signed by the rightful owner of the resource being traded in the transaction. When new coins (resources) are created they are assigned to an owner. This owner, in turn, can prepare new transactions that send those coins to others by simply embedding the new owner Continue reading >>

Ethereum Accounts, Address And Contracts

Ethereum Accounts, Address And Contracts

pragma solidity ^0.4.10;/* taking ideas from FirstBlood token */contract SafeMath { /* function assert(bool assertion) internal { */ /* if (!assertion) { */ /* throw; */ /* } */ /* } // assert no longer needed once solidity is on 0.4.10 */ function safeAdd(uint256 x, uint256 y) internal returns(uint256) { uint256 z = x + y; assert((z >= x) && (z >= y)); return z; } function safeSubtract(uint256 x, uint256 y) internal returns(uint256) { assert(x >= y); uint256 z = x - y; return z; } function safeMult(uint256 x, uint256 y) internal returns(uint256) { uint256 z = x * y; assert((x == 0)||(z/x == y)); return z; }}contract Token { uint256 public totalSupply; function balanceOf(address _owner) constant returns (uint256 balance); function transfer(address _to, uint256 _value) returns (bool success); function transferFrom(address _from, address _to, uint256 _value) returns (bool success); function approve(address _spender, uint256 _value) returns (bool success); function allowance(address _owner, address _spender) constant returns (uint256 remaining); event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value);}/* ERC 20 token */contract StandardToken is Token { function transfer(address _to, uint256 _value) returns (bool success) { if (balances[msg.sender] >= _value && _value > 0) { balances[msg.sender] -= _value; balances[_to] += _value; Transfer(msg.sender, _to, _value); return true; } else { return false; } } function transferFrom(address _from, address _to, uint256 _value) returns (bool success) { if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) { balances[_to] += _value; balances[_from] -= _value; allowed[_from][msg.sender] -= _value; Transf Continue reading >>

Ether - Are Receiving Address And Contract Address The Same Thing? - Ethereum Stack Exchange

Ether - Are Receiving Address And Contract Address The Same Thing? - Ethereum Stack Exchange

Are receiving address and contract address the same thing? I have a wallet, in there I've got a receiving address by which I can receive cryptocurrency from others. But could this address also be called contract address?I know a little bit smart contract, and some ICO projects also use contract addresses to receiving funding coins, but are they basically same thing? I have a wallet, in there I've got a receiving address... could this address also be called contract address? No - they're different things. They do have a few things in common, but ultimately they differ in some significant ways. A Contract is code that has been deployed to the Ethereum blockchain. It lives at a fixed address, but you don't have a corresponding Private Key that is paired with the address - however, you can call functions on the contract and restrict who can interact with the contract etc. The code could have be written to serve many purposes - it may even be a 'wallet contract' that can hold Ether or tokens on your behalf, but it is not always the case that this contract will accept Ether or tokens e.g. if the contract has no payable function. Can be 'destroyed' i.e. have the code deleted to de-activate them. Your Ethereum address, on the other hand, is related to a Public Key, which you have a Private key for. As long as you are the only one that knows the Private Key, you are the only one that can perform any actions from the address. It can always receive Ether or tokens - even if you don't want to. Can't be 'destroyed', but losing the Private Key for the address is conceptually similar. Continue reading >>

Create A Crowdsale Contract In Ethereum

Create A Crowdsale Contract In Ethereum

Raising funds from friends without a third party Sometimes a good idea takes a lot of funds and collective effort. You could ask for donations, but donors prefer to give to projects they are more certain will get traction and proper funding. This is an example where a crowdfunding would be ideal: you set up a goal and a deadline for reaching it. If you miss your goal, the donations are returned, therefore reducing the risk for donors. Since the code is open and auditable, there is no need for a centralized, trusted platform and therefore the only fees everyone will pay are just the gas fees. In this example we will make a better crowdfunding by solving two important problems: how rewards are managed and kept, and how the money is spent after the funds are raised. Rewards in crowdfundings are usually handled by a central unchangeable database that keeps track of all donors: anyone who missed the deadline for the campaign cannot get in anymore and any donor who changed their mind can't get out. Instead we are going to do this the decentralized way and just create a token to keep track of rewards, anyone who contributes gets a token that they can trade, sell or keep for later. When the time comes to give the physical reward the producer only needs to exchange the tokens for real products. Donors get to keep their tokens, even if the project doesn't achieve its goals, as a souvenir. Also, generally those who are funding can't have any say on how the money is spent after the funds are raised and mismanagement often causes projects never to deliver anything at all. In this project we will use a Democratic Organization that will have to approve any money coming out of the system. This is often called a crowdsale or crowd equity and is so fundamental that in some cases the tok Continue reading >>

Ethereum Account 0xd0a6e6c54dbc68db5db3a091b171a77407ff7ccf Info

Ethereum Account 0xd0a6e6c54dbc68db5db3a091b171a77407ff7ccf Info

contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; }}contract ERC20 { function totalSupply() constant returns (uint supply); function balanceOf( address who ) constant returns (uint value); function allowance( address owner, address spender ) constant returns (uint _allowance); function transfer( address to, uint value) returns (bool ok); function transferFrom( address from, address to, uint value) returns (bool ok); function approve( address spender, uint value ) returns (bool ok); event Transfer( address indexed from, address indexed to, uint value); event Approval( address indexed owner, address indexed spender, uint value);}contract DSAuthority { function canCall( address src, address dst, bytes4 sig ) constant returns (bool);}contract DSAuthEvents { event LogSetAuthority (address indexed authority); event LogSetOwner (address indexed owner);}contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; function DSAuth() { owner = msg.sender; LogSetOwner(msg.sender); } function setOwner(address owner_) auth { owner = owner_; LogSetOwner(owner); } function setAuthority(DSAuthority authority_) auth { authority = authority_; LogSetAuthority(authority); } modifier auth { assert(isAuthorized(msg.sender, msg.sig)); _; } modifier authorized(bytes4 sig) { assert(isAuthorized(msg.sender, sig)); _; } function isAuthorized(address src, bytes4 sig) internal returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { Continue reading >>

Myetherwallet.com

Myetherwallet.com

Ledger / TREZOR / Digital Bitbox : Use your hardware wallet . Your device * is * your wallet. MetaMask Connect via your MetaMask Extension . So easy! Keys stay in MetaMask, not on a phishing site! Try it today. Jaxx / imToken Use your Mnemonic Phrase to access your account. Mist / Geth / Parity: Use your Keystore File (UTC / JSON) to access your account. **Do not lose it!** It cannot be recovered if you lose it. **Do not share it!** Your funds will be stolen if you use this file on a malicious/phishing site. **Make a backup!** Secure it like the millions of dollars it may one day be worth. **If you do not reveal your bid, you will not be refunded.** You will unlock your account, enter the Bid Amount, and the Secret Phrase. In the event that two parties bid exactly the same amount, the first bid revealed will win. Once the auction has ended (after 5 days / 120 hours), the winner needs to finalize the auction in order to claim their new name. The winner will be refunded the difference between their bid and the next-highest bid. If you are the only bidder, you will refunded all but 0.01 ETH. The auction for this registrar is a blind auction, and is described in EIP162 . Basically, no one can see *anything* during the auction. Be safe & secure: We highly recommend that you read our guide on How to Prevent Loss & Theft for some recommendations on how to be proactive about your security. Always backup your keys: MyEtherWallet.com & MyEtherWallet CX are not "web wallets". You do not create an account or give us your funds to hold onto. No data leaves your computer / your browser. We make it easy for you to create, save, and access your information and interact with the blockchain. We are not responsible for any loss: Ethereum, MyEtherWallet.com & MyEtherWallet CX, and some of Continue reading >>

Cryptocurrency Music Account Address Versus Contract Address Ethereum

Cryptocurrency Music Account Address Versus Contract Address Ethereum

Cryptocurrency Music Account Address Versus Contract Address Ethereum Backed by the Ethereum Blockchain, Choon will create a music and digital content ecosystem powered by music, streaming and curation. Max has always had a penchant for helping other artists and sees Choon as a revolutionary opportunity to disrupt a one-sided industry in a way that will, through fair compensation, enable more creativity to benefit both the artists, listeners and the global music scene overall. I believe this can empower thousands of people to build meaningful things. Subscribe to our mailing list to be the first to hear about key updates. Therefore, I suggest you save the set-up steps below, so you can access it later. The current music industry no longer represents the interests of the most important people: This is because ether transfers initiated by Contract Wallets in essence code still do not appear in some Block Explorers. HitBTC - reputed global trading platform with multi-currency support, operating since This value is used to control the Block generation time of a Blockchain. If not, you will need to open the Contract tab in your Parity wallet to do the following steps:. Alright, we are almost done editing the contract code. Even though the price of the single is listed in USD, payment can only be made using Ether, a cryptocurrency created within the Ethereum ecosystem. When will Storj Labs complete the 1: There is a mix of technical and economic reasons why we decided to create SJCX. Since we are already on homestead version, this attribute is 0. Storj completely removes trust from the equation. You have successfully unlocked your imToken wallet, in your myetherwallet account. For them, sending from an Account would be more economical. How can an average Can A Bank Cash Bitc Continue reading >>

Can I Send To Ethereum Contract Addresses?

Can I Send To Ethereum Contract Addresses?

Can I send to Ethereum contract addresses? No. At this time sending to Ethereum contract addresses is disabled. If you need to send ethereum to a contract address then you will need to export the private key associated with your ethereum address. You canthen import your private keyinto a different ethereum wallet that supports this feature. You can read more about exporting your private key in this article . Continue reading >>

Send Ethereum From Smart Contract Addresses

Send Ethereum From Smart Contract Addresses

Send Ethereum from Smart Contract Addresses Send Ethereum from Smart Contract Addresses Since SpectroCoin started supporting Ethereum cryptocurrency in 2017, our clients were able to buy, sell or send and receive Ethereums native currency called Ether (ETH) using our platform. Now, we are happy to announce SpectroCoin has started supporting deposits made from Ethereum smart contract addresses. Thus, users can now send ETH to their SpectroCoin accounts from wallets and exchanges that support the smart contract transaction capability. Unlike other cryptocurrencies, there are two types of Ethereum addresses: Account address or regular address, which works in the same way as a Bitcoin address does. We will refer to it as a regular address. Contract account or contract address. Basically, it is what distinguishes Ethereum and makes it smarter when compared to other cryptocurrencies. A regular Ethereum address might look similar to a contract address just a line of numbers; however, they act very differently. The regular address is mostly used as a bare store for Ether, much like your bank account. The contract address is created from an account address, which then becomes the master of this contract. Unlike a regular address, Ethereum smart contract address is controlled by a code which means that the behavior of contracts can be customized. Therefore, while a regular address is simply used for storing, a contract can be used to manage Ethereum. That enables the creation of incoming transactions to a contract address, multi-signature blockchain wallet set-up, as well as the creation of Ethereum ERC20 tokens. While providing a higher level of customization for your Ethereum, contract addresses are also more complex and difficult to implement into an already-running system. T Continue reading >>

Understanding Erc-20 Token Contracts

Understanding Erc-20 Token Contracts

Focusing on real-world use cases for Ethereum Earlier this week the ERC-20 token interface became a formal improvement proposal , freezing the definition. This article takes a look at tokens and explains the features and functions of ERC-20 to provide an understanding of what token contracts are and how developers can work with them. ERC-20 came about as an attempt to provide a common set of features and interfaces for token contracts in Ethereum, and has proved to be very successful. ERC-20 has many benefits, including allowing wallets to provide token balances for hundreds of different tokens and creating a means for exchanges to list more tokens by providing nothing more than the address of the tokens contract. The benefits of creating a token as ERC-20 compliant is such that very few token contracts today are created any other way. There remains a lot of confusion around what token contracts really are. Essentially, a token contract is a smart contract that contains a map of account addresses and their balances. The balance represents a value that is defined by the contract creator: one token contract might use balances to represent physical objects, another monetary value, and a third the holders reputation. The unit of this balance is commonly called a token. When tokens are transferred from one account to another the token contract updates the balance of the two accounts. For example, a transfer of 10 tokens from 0x22993ab7 to 0x1f593492 would result in the balances being updated as shown below: Transfer of 10 tokens from 0x22993ab7 to 0x1f593492; changes shown inred It is possible to change the total supply of a token in two ways, if the token contract allows. The total supply of tokens can be increased by minting new tokens. For example, minting 100 tokens to Continue reading >>

Eth/eth Token Single Address

Eth/eth Token Single Address

Bittrex is always looking to provide the highest-quality customer experience. As part of that commitment, we are providing advanced notice that by February 16, 2018, Bittrex will transition Ethereum and all Ethereum tokens to a single contract address per account. Moving Ethereum tokens to a single contract address (single address) will allow customers to save money on network fees and help reduce user error. Additionally, this action will simplify and improve the overall performance of the Bittrex platform. A single address provides the following benefits: Reduces the network fees associated with deposits; Mitigates the risk of customers depositing Ethereum tokens to the wrong address; and Improves the overall user experience and performance of the Bittrex platform. What do I need to do if I have an existing Ethereum address? Before making any deposits verify your currently assigned address on the wallets tab. If that address is blank, youll need to generate a new one by clicking the New Address button. If you are using APIs, scripts, or otherwise making automated deposits, please dont assume previously-assigned addresses are still valid. You should always check your address before initiating a deposit. For more information read: Will any balances or tokens be impacted by the single address update? No user balances or tokens will be impacted by this update. What if I accidentally use my old Ethereum addresses after receiving my new, single address? Assets transferred to old token addresses will automatically be credited to your account until March 9, 2018. After this date, any assets transferred to the old addresses MAY NOT be credited to your account, requiring customers to open a support ticket. You may open a ticket by using this link: I am a new Ethereum user, do Continue reading >>

How To Find Out If An Ethereum Address Is A Contract?

How To Find Out If An Ethereum Address Is A Contract?

An address in Solidity can be an account or a contract (or other things, such as a transaction). When I have a variable x, holding an address, how can I test if it is a contract or not? (Yes, I've read the chapter on types in the doc) Edit: Solidity has changed since this answer was first written, @manuel-aroz has the correct answer. There is no way in solidity to check if an address is a contract. One of the goals of Ethereum is for humans and smart contracts to both be treated equally. This leads into a future where smart contracts interact seamlessly with humans and other contracts. It might change in the future , but for now an arbitrary address is ambiguous. Yes you can, by using some EVM assembly code to get the address' code size: function isContract(address addr) returns (bool) { uint size; assembly { size := extcodesize(addr) } return size > 0;} This isn't something you can query from within a contract using Solidity, but if you were just wanting to know whether an address holds contract code or not, you can check using your geth console or similar with eg: > eth.getCode("0xbfb2e296d9cf3e593e79981235aed29ab9984c0f") with the hex string (here 0xbfb2e296d9cf3e593e79981235aed29ab9984c0f) as the address you wish to query. This will return the bytecode stored at that address. You can also use a blockchain scanner to find the source code of the contract at that address, for example the ecsol library as shown on etherscan.io . Continue reading >>

Chapter 2: Working With Contractwallets

Chapter 2: Working With Contractwallets

From Chapter 1 we know that Ethereum has two types of accounts: One type, which we have been referring to simply as an Account, we already are quite familiar with having created them and stored ether in them. The other type of account is the Contract Account. While an Account has a password-protected private key and an address, a Contract Account has no private key but has an address, code, and storage. Contract Wallets (or contract-based wallets) are built with Contract Accounts, utilizing the ability of Contract Accounts to hold and run code with associated persistent storage. Of course, Contract Accounts can be used to do a lot more than just create Contract Wallets. Utilizing Contract Accounts, developers are hard at work creating all kinds of fascinating Decentralized Applications (DApps) right now. How Are Contract Wallets Different From Accounts? Accounts can be used as bare stores for ether, though they can also be used to do things other than just hold ether. When they are used to hold ether, Accounts can be thought of simply as private key/address pairs. The sole function of a Contract Wallet is to manage ether, that is, receive, store and spend ether.Unlike Accounts, Contract Wallets are controlled by code, which means that it is possible to customize their behavior. And, you wont have to do any coding yourself; the Contract Wallets come with a user interface that makes it easy to simply select the type of security/convenience enhancing customization you require. Contract Wallets are controlled by code but ultimately that code also has a master, and that master is an Account with its password-protected private key. So Accounts serve two roles; as bare stores of ether in their own right, and as owners (or controllers) of feature-rich Contract Wallets. Exactly Continue reading >>

More in ethereum

  • Bot Trading Bitcoin Indonesia

    Crea tu propio grupo de minera de bitcoin Robot trading bitcoin indonesia - Dificultad litecoin minero If the exchange ...

    ethereum Dec 11, 2019
  • Vip Bitcoin Blog

    Cryptocurrency Websites to Bookmark and Follow Here are 11 sites you should consider checking regularly. This is one of...

    ethereum Mar 11, 2020
  • Bitcoin Co Id App

    Global token platform for blockchain projects, loyalty points and crypto token exchange. The token economy revolution s...

    ethereum May 10, 2018
  • Where Sell Ethereum

    You can buy Bitcoin and Ethereum from International Exchanges like Bitcoin Exchange, Trading BTC USD, BTC EUR - CEX.IO ...

    ethereum Mar 28, 2020
  • Btg Bitcoin Indonesia

    Home Cryptocurrency Bitcoin Bitcoin Price Prediction: Congress Report, Indonesia; More Positive Signals for BTC Bitcoin...

    ethereum Feb 13, 2020
  • Byzantium Ethereum

    How do I know if my private net is using Byzantium? Is there a flag that is showing that Byzantium is actually enabled ...

    ethereum Mar 28, 2018
  • How To Stake Ethereum

    Ethereum proof of stake implementation launched by Applicature Applicature is working on projects implying the developm...

    ethereum Mar 27, 2018
  • Buy Ethereum With Credit Card Reddit

    4chan Pass users can bypass this verification. [ Learn More ] [ Login ] Please read the Rules and FAQ before posting. N...

    ethereum Mar 29, 2020
  • Kantor Bitcoin Bali

    BI Deteksi 44 Usaha di Bali Terima Transaksi Bitcoin Cs DENPASAR - Kantor Perwakilan Bank Indonesia Provinsi Bali mengi...

    ethereum Mar 7, 2020