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Topics I planned to cover or I already cover:
- [x] HelloWorld ([code](https://github.com/amazingandyyy/complete-ethereum-smart-contract-tutorials/tree/master/01-HelloWorld), [medium](https://mediu…
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```
../ico_per_week/crowdsale/contracts/BlockchainLabsCrowdsale.sol:3:1: Error: Source "zeppelin-solidity/contracts/crowdsale/Crowdsale.sol" not found: Unknown exception in read callback.
import 'ze…
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As an investor, I'd like to buy tokens using contact address which is fallback function.
I see this pattern is used quite extensively in your contracts with 1 caution: all those contracts have to t…
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> We should deploy our contracts right, before we start forecasting on Wings platform. So let's make a migration script...
What I did:
* create empty directory
* `truffle init`
* copy `node_modu…
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Project Name: Open Zappelin Crowdsale smart contract migration verification
Project repository: https://github.com/adybose/platon-open-zeppelin-crowdsale-contract
Development tools/resources use…
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contract Token {}
Why not with the crowdsale file?
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While trying to deploy example contracts to testnet I'm always getting "populus.contracts.exceptions.UnknownContract" exception.
Here are logs for example.yml:
```
(venv) anonymous@anonymous-mac…
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# Handle
hrkrshnn
# Vulnerability details
## Requiring a decimals method for ERC-20 tokens is non-standard
The [ERC-20](https://eips.ethereum.org/EIPS/eip-20) token standard
specifies that
``` t…
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> Now let's deploy bridge and direct crowdsale to bridge`
```
await deployer.deploy(Bridge, web3.toWei(10, 'ether'), web3.toWei(100, 'ether'), token.address, crowdsale.address)
const bridge = await…
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# Handle
leastwood
# Vulnerability details
## Impact
There are a number of instances where `readAndAgreedToMarketParticipationAgreement` is checked. This check can be further simplified from `rea…