Questions tagged [tokens]

A token is a transferable, divisible object on the blockchain, such as a subcurrency or a prediction market share.

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Passive DAO participation vs. Active DAO Participation

If being part of "The DAO" is similar to being a shareholder in a company, how is the passive DAO Token holder affected by decisions made by the active participants. If for example, the Slock.it ...
Absconds's user avatar
8 votes
2 answers
2k views

How to implement the ERC777 token standard?

Does anyone know how to correctly implement the new ERC777 token standard? I've been trying to create an ERC777 contract (see code below) but keep struggling with a couple of things. According to ...
hurb's user avatar
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Performing a smart escrow with ERC20 tokens

After developing a token Smart Contract that is compliant with the ERC20 standard https://github.com/ethereum/EIPs/issues/20 (is that the same as token API https://github.com/ethereum/wiki/wiki/...
Juan Ignacio Pérez Sacristán's user avatar
8 votes
1 answer
1k views

Following token tutorial on ethereum.org, get error message "No data is deployed on the contract address"

I'm simply copying the full coin code found in this tutorial to deploy a contract on the testnet using mist, but I get the error message "No data is deployed on the contract address". The contract ...
Jakk's user avatar
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7 votes
4 answers
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How to withdraw Ether from The DAO?

As I understand, everyone who invested in The Dao recieves tokens which enable to propose and vote in the DAO. And anyone holding tokens could anytime withdraw the Ether invested if he is not ...
q9f's user avatar
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7 votes
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Obtain token transfer data from an address

I would like to obtain token transfer data from an address via Rest API For example, take this address: https://etherscan.io/address/0xfbb1b73c4f0bda4f67dca266ce6ef42f520fbb98#tokentxns (Etherscan ...
CQM's user avatar
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7 votes
1 answer
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How can I list The DAO proposals and vote from the command line?

Are there any command line tools to vote on The DAO proposals? I would like to: List the open proposals Check whether I have already voted on these proposals Check my voting history Vote on the ...
BokkyPooBah's user avatar
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7 votes
3 answers
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How to find all token holders?

For example, the contract saves the address when token created but after that token holder could send token or all tokens to another wallet. Is it possible to find all wallet addresses of token ...
eugenn's user avatar
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7 votes
1 answer
855 views

Buy Gnosis tokens with geth

How to participate to Gnosis pre-sale using geth javascript console? In gnosis official blog is described how to do it using parity but there's no information on how to do it using geth.
0x8000's user avatar
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3 answers
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What are DAO tokens?

I tried to understand what a DAO token is that you can buy for Ether, but I can't. And because my OSX Ether wallet has issues, I can't try to buy DAO tokens, so I hope you could explain me what it is....
ParisNakitaKejser's user avatar
7 votes
1 answer
2k views

How to get all ethereum address list which have my token?

I want a list of all ethereum address which have my ERC20 token in their account. Anyone have an idea how to get list address. beause i want give divided to each account which have my ERC20 token.
Sagar Jethi's user avatar
7 votes
2 answers
3k views

How do ERC-20 Tokens work?

I thought I understood ERC-20 tokens. However, I wanted to purchase a small amount of basic attention token (like $5) to learn and experiment with. That's when I realized that I didn't understand them ...
Some User's user avatar
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7 votes
3 answers
6k views

Interacting with a deployed contract: How can I mint a token based on the Open Zeppelin Standard

Please excuse what seems to me a basic question, as I am very new to this: I'm using the truffle framework to deploy a smart contract. Playing around with Open zeppelin standard tokens, I've issued ...
Guid0's user avatar
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7 votes
3 answers
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What is DeFi decentralized finance?

What is DeFi? What are its core components? How to think about or picture "it"? Some of the parts are tokens, stablecoins (tokens with specific properties to reduce its volatility), and exchanges, ...
eth's user avatar
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7 votes
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Accessing funds that are sent to the smart contract address

If someone creates a smart contract (and is owner of that contract), is it possible for that person to collect ETH and other tokens, that are sent to the address of smart contract?
nikola ivkov's user avatar
7 votes
1 answer
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Why is this a potential violation of Checks-Effects-Interaction pattern?

That's what Remix is telling me. Now when I look at the documentation as to what this means it seems to be talking about, as I understand it, recursively entering a control flow (if): Ether ...
chrisheseltine's user avatar
7 votes
2 answers
6k views

Token transfer: Intrinsic gas too low

I have created a cryptocurrency by following this link .I have deployed the contract in Mist. I am using transferFrom() function in Ethereum wallet to transfer currency from one account to other but ...
Prashant Prabhakar Singh's user avatar
7 votes
1 answer
540 views

Parity - Token disappear

love parity, great Ethereum Client and a stunning pace of progress. If the developers read this: Much thanks! But there is one little tiny bug ... When I start parity and open the visual wallet in ...
Christoph Bergmann's user avatar
7 votes
2 answers
4k views

What happens if you transfer real tokens to a test account?

What happens if you transfer real tokens to a test account? The Ethereum wallet says that you shouldn't do it, but it doesn't say why.
Lay González's user avatar
6 votes
3 answers
5k views

Do Solidity smart contract symbols support unicode?

In a smart contract where the token name and symbol are defined, is unicode supported or should these be ASCII only characters? As below, would it be a valid contract or token symbol? constructor()...
aug2uag's user avatar
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2 answers
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Impersonating accounts on a forked Ethereum main net using Hardhat

I used the example from the Hardhat docs to impersonate an account on a forked network: await hre.network.provider.request({ method: "hardhat_impersonateAccount", params: ["0x...."]...
Mttank's user avatar
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6 votes
1 answer
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Someone sent 0 ETH to my contract and got 134100 tokens

we have just finished a phase of our ICO and we were looking among the transactions. Someone managed to send 0 ETH to our contract and in return got 130 000 tokens. How did he do that and how ...
Cristian's user avatar
6 votes
1 answer
4k views

ERC-165 query on ERC-721 implementation

While testing ERC-721 implementation from https://github.com/m0t0k1ch1/ERC721-token-sample/blob/master/contracts/MyNonFungibleToken.sol and trying to query the method supportsInterface I got the ...
Juan Ignacio Pérez Sacristán's user avatar
6 votes
1 answer
5k views

Why is it considered a bad practice to burn tokens to 0x0 when creating an ERC20 token?

The Consensys Smart Contract Best Practices guide recommends to prevent transferring tokens to the 0x0 address. I understand that 80M or more is locked at this address, but so what? Why is that bad, ...
Maxime Dupré's user avatar
6 votes
4 answers
12k views

Getting notified after receiving tokens

Is there any way to get a notification(PN, Email etc.) when one receives ETH or tokens issued on ethereum?
anon's user avatar
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6 votes
1 answer
4k views

Smart Contract to receive tokens and give ether?

A CrowdSale contract usually receives Ether in exchange of certain token. Is it possible to make it backwards? To receive certain token and give an amount of ether in exchange? Is as simple as ...
Moisés Briseño Estrello's user avatar
6 votes
3 answers
4k views

Error creating contracts on Ethereum wallet

First of all, I'd like to provide a disclaimer. I'm not a developer, I never studied codes, and never wrote scripts since I was 14 years old. I'm doing this project for the company I work in at the ...
falbouni's user avatar
6 votes
1 answer
19k views

How to get the ERC-20 token balance of an account using etherjs?

I want to get the ERC-20 token balance of an account using ethers.js. Could you help me?
Alex Weber's user avatar
6 votes
2 answers
3k views

Will contract selfdestruct also return tokens?

If I have tokens assigned to a smart contract, will "killing" the contract send leftover tokens to the owner of the contract? I know that remaining Ether stored in the contract is sent to owner in ...
GusGorman402's user avatar
6 votes
2 answers
2k views

Are mineable tokens possible?

I'm a bit puzzled about the ethereum.org/token example which states further down in the advanced examples that it can be coupled to proof-of-work. I really like the idea of mining a token. The example ...
q9f's user avatar
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6 votes
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ERC20 vs ERC721

Is there a list of changes that making ERC721 become non-fungible token and different from ERC20? Are there examples of ERC721 contracts? Is there any drawback of ERC721?
Anderson's user avatar
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6 votes
1 answer
5k views

Crowdsales: non-mintable tokens vs mintable tokens (with hard cap)

There are crowdsales where the initial supply is set upon deployment which is set to the defined total supply (so that number is as many tokens that there will be) and when someone buys tokens during ...
pabloruiz55's user avatar
  • 7,686
6 votes
6 answers
14k views

Full list of Erc20 Tokens

Is there a way to get a full and updated list of all Erc20 tokens on the Ethereum blockchain? Etherscan.io contains a token name search, but it doesn't show the full list, which is 7668.
Pedro Lobito's user avatar
6 votes
1 answer
625 views

Is there a mobile wallet for iOS?

I looks like JAXX is only for Android. Is there really no option for iPhone yet?
ZMitton's user avatar
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6 votes
4 answers
636 views

How to get Token balances

How to get balances of all ERC 20 tokens a wallet holds?
Devsuite's user avatar
6 votes
3 answers
27k views

Accessing ERC-20 tokens in MetaMask

I sent tokens (veri) from my ether wallet to meta mask address ether scan shows the transaction but i cannot see them or send them. If you have a solution please explain as if i were 4 yr old. cheers ...
paisan's user avatar
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6 votes
1 answer
605 views

Why is it called tokenURI instead of tokenURL?

Seems tokenURI always returns a URL, so why the name choice?
Dimitri Borgers's user avatar
6 votes
1 answer
3k views

How does one see all tokens owned by an account?

Sorry, I do not understand this very well. But with tokens (let's say those which follow ERC20), can one ethereum address own multiple tokens? How would one determine the names and balances of those ...
trolltoll's user avatar
6 votes
2 answers
2k views

Best practices on Token ICO launch

I'm trying to understand how exactly the pre-ICO/ICO should be structured in terms of technical aspect. What are there trustworthy things that every ICO developer should think about. I'm interested ...
rstormsf's user avatar
  • 4,337
6 votes
2 answers
997 views

Token Tutorial: How to provide an address correctly to the `mintToken` function?

I worked the Token tutorial. At one stage, newly minted tokens can be supplied to a target address. However, when I provide the address from a test account on a private net (eth.account[1]), I get an ...
TMOTTM's user avatar
  • 1,953
6 votes
1 answer
4k views

How to get the token-balance of an external token in my contract

I'm building a token contract with a sell and buy function. User should be able to buy my token not only for eth but also for another token, that I define. Therefore I need the balance mapping of the ...
Jerry's user avatar
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6 votes
1 answer
738 views

What happens with DGD in an exchange?

If I understand correctly, DGD pays you a small free on all digix gold trades. Now, what happens when you deposit your DGD in an exchange? The DGD is still yours, so you're supposed to receive the ...
MaiaVictor's user avatar
  • 3,177
6 votes
1 answer
13k views

How does Uniswap calculate price impact without fee on the swap page?

Context: We are creating a smart contract which integrates Uniswap DEX for swapping Tokens to ETH. We need to make sure one swap does not impact the token price more than 3%. We are in need to write a ...
lovekenly's user avatar
6 votes
1 answer
202 views

How can a "for-friends-only" token be traded with other currencies?

I'll start by saying that I'm a newbie. I'm learning Solidity and how Smart Contracts work. What I would like to do is simple: I would like to sell MyFriendToken (MFT) to friends only, in exchange ...
d3llafr33's user avatar
  • 619
6 votes
1 answer
1k views

How to interface function of deployed contract in new contract?

I have deployed Standard token contract using mist. Now I want to create interface functions for the deployed contract. contract MyToken { function mint(address _to, uint256 _amount) onlyOwner ...
Basit Raza's user avatar
6 votes
2 answers
700 views

creation ERC721 error: Transaction failed, invalid address,

I would like to learn how ERC721 token works. I found some sample contracts online and tried to use remix and Ethereum Wallet to deploy the contract. The compile was fine but failed in the creation. ...
rc0918's user avatar
  • 71
6 votes
1 answer
3k views

how to call smart contract function in C#.net core

protected async void Page_Load(object sender, EventArgs e) { var senderAddress = "0x605a1f8d368cbdd4d0a5cbad74f75c428660f17b"; var password = "zxcasdqwe123"; ...
Sandeep Gupta's user avatar
6 votes
1 answer
4k views

How do I get a refund for my The DAO tokens that was split into a child DAO?

The DAO token holders that split away from the main The DAO into a child DAO will have moved the tokens (DAO) and the corresponding ethers (ETH) into the child DAO. As these DAO token holders have a ...
BokkyPooBah's user avatar
  • 40.3k
6 votes
2 answers
186 views

Is there an ethereum android wallet where I don't have to manually add in tokens I have and just auto detects it?

Using coinomi or even metamask on chrome is quite annoying as I need to manually add in tokens I have in my account and it doesn't auto show up. Is there an android or desktop ethereum wallet that ...
Patoshi パトシ's user avatar
6 votes
2 answers
963 views

How are Tokens issued to Bitcoin investors for ICO based on Ethereum

I was looking to know how an Ether based ICO can Accept & Reward Tokens to its Bitcoin donors. I understand that ether can be tracked & reward can be issued to the Donor's ether address ...
Sam's user avatar
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