Token Sale Smart Contracts

Neeraj Murarka
The Blueprint by Bluzelle
2 min readJan 3, 2018

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Happy New Year to everyone!

2018 ushers in a whole new year of exciting roadmap developments and events for Bluzelle.

The long-awaited Bluzelle token sale (aka: ICO) is the first such event coming up this January. The token sale is driven by Solidity smart contracts running on Ethereum’s blockchain, on which the token sale is being conducted.

There are two smart contracts:

  • Token contract:
    Also known as the ERC20 token, the token contract governs the token itself, including managing transfers, who owns what, etc. It is a pretty straightforward contract that is based on the ERC20 standards adopted by the world. Bluzelle’s token will be called “BLZ” and will have a lockdown period governed by the token contract that prevents trades and transfers and sales of the token for a specific number of days after the end of the token sale.
  • Sale contract:
    The purpose of the sale contract is to accept ETH from token buyers and immediately send them Bluzelle tokens (BLZ) in return, back to the very same Ethereum wallet from which they paid out the ETH. The sales contract is customized to suit the needs of the Bluzelle sale. In our case, we have caps for different groups of people. These caps go up over time if there are unsold tokens, giving people higher caps once everyone has had a fair shot at buying tokens. The sale contract is designed to be fair and eliminates any “rush” for people to buy tokens the moment the sale starts, giving them ample time to do so and ensuring the Ethereum blockchain does not become a bottleneck.

The smart contracts are built upon Solidity code, all of which is publicly available for audit, comment, and review.

These contracts have been developed by Enuma Technologies, one of the leading developers of secure smart contracts.

The contracts have also been security audited by two of the world’s leading auditing agencies (apart from Enuma).

The Github URL for the code is as follows:

Please go ahead and take a look at the code at your own convenience. We at Bluzelle look forward to hearing your feedback!

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