About BAT
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Basic Attention Token (BAT) is an open-source, decentralized ad exchange platform built on <a href="https://www.coingecko.com/en/coins/ethereum">Ethereum</a> platform. Basic Attention Token held an initial coin offering on May 31, 2017 for its eponymous ERC-20 utility token, raising approximately $35M USD at the time in less than 30 seconds. The Basic Attention Token aims to fix digital advertising, which is broken, fraudulent and opaque.
Basic Attention Token work by having advertisers pay BAT to website publishers for the attention of users. The BAT token is designed to correctly value and price user attention within the platform. The Basic Attention Token comprises various components, including attention measurement systems, analytics dashboards and machine learning algorithms. Integration of BAT into a given host application involves implementing BAT Ads, a system that matches and displays ads to users based on locally stored data. Ad targeting is performed wholly on-device, removing the need for third-party tracking. BAT is focused on the Brave browser. Brave is an open-source, privacy-centered browser designed to block trackers and malware. It utilizes blockchain technology to anonymously and securely track user attention, which translates into rewards for publishers.
A user's attention, meaning his or her focused mental engagement on digital content like advertisements, is logged through Brave. The makers of BAT indicate that the user's private data and tracking information is stored only on the user's device, ensuring that it is anonymous and private.
Created back in 2016, the Basic Attention Token has one of the biggest names behind it, that of Brendan Eich, the creator of JavaScript and the legendary co-founder of Mozilla. Other noteworthy team members include Brian Bondy, lead developer and co-founder of Brave and Scott Locklin, senior engineer, and co-founder of Kerf Software."
Basic Attention Token is created by the team that built the <a href="https://brave.com/coi600">Brave browser</a>, an open-source, privacy-focused browser that blocks ads and trackers. The browser measures user attention and rewards publishers for users attention.
Use the Brave browser to protect your privacy and support CoinGecko at the same time: https://brave.com/coi600
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Laser Scorebeta Last Audit: 4 September 2022
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TransparentUpgradeableProxy.constructor(address,address,bytes)._admin (#346) shadows:
- TransparentUpgradeableProxy._admin() (#439-445) (function)
BEP20UpgradeableProxy.constructor(address,address,bytes).admin (#475) shadows:
- TransparentUpgradeableProxy.admin() (#383-385) (function)
Rename the local variables that shadow another component.
Additional information: link
Modifier TransparentUpgradeableProxy.ifAdmin() (#366-372) does not always execute _; or revert
All the paths in a modifier must execute _ or revert.
Additional information: link
Low level call in Address.sendValue(address,uint256) (#141-147):
- (success) = recipient.call{value: amount}() (#145)
Low level call in Address._functionCallWithValue(address,bytes,uint256,string) (#207-228):
- (success,returndata) = target.call{value: weiValue}(data) (#211)
Low level call in UpgradeableProxy.constructor(address,bytes) (#255-263):
- (success) = _logic.delegatecall(_data) (#260)
Low level call in TransparentUpgradeableProxy.upgradeToAndCall(address,bytes) (#429-434):
- (success) = newImplementation.delegatecall(data) (#432)
Avoid low-level calls. Check the call success. If the call is meant for a contract, check for code existence
Additional information: link
TransparentUpgradeableProxy.upgradeToAndCall(address,bytes).newImplementation (#429) lacks a zero-check on :
- (success) = newImplementation.delegatecall(data) (#432)
UpgradeableProxy.constructor(address,bytes)._logic (#255) lacks a zero-check on :
- (success) = _logic.delegatecall(_data) (#260)
Check that the address is not zero.
Additional information: link
Proxy._delegate(address) (#23-43) uses assembly
- INLINE ASM (#25-42)
Address.isContract(address) (#114-123) uses assembly
- INLINE ASM (#121)
Address._functionCallWithValue(address,bytes,uint256,string) (#207-228) uses assembly
- INLINE ASM (#220-223)
UpgradeableProxy._implementation() (#280-286) uses assembly
- INLINE ASM (#283-285)
UpgradeableProxy._setImplementation(address) (#301-310) uses assembly
- INLINE ASM (#307-309)
TransparentUpgradeableProxy._admin() (#439-445) uses assembly
- INLINE ASM (#442-444)
TransparentUpgradeableProxy._setAdmin(address) (#450-457) uses assembly
- INLINE ASM (#454-456)
Do not use evm assembly.
Additional information: link
Different versions of Solidity is used:
- Version used: ['^0.6.0', '^0.6.2']
- ^0.6.0 (#5)
- ^0.6.2 (#91)
- ^0.6.0 (#235)
- ^0.6.0 (#317)
- ^0.6.0 (#470)
Use one Solidity version.
Additional information: link
Address._functionCallWithValue(address,bytes,uint256,string) (#207-228) is never used and should be removed
Address.functionCall(address,bytes) (#167-169) is never used and should be removed
Address.functionCall(address,bytes,string) (#177-179) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256) (#192-194) is never used and should be removed
Address.functionCallWithValue(address,bytes,uint256,string) (#202-205) is never used and should be removed
Address.sendValue(address,uint256) (#141-147) is never used and should be removed
Proxy._implementation() (#49) is never used and should be removed
Remove unused functions.
Additional information: link
Pragma version^0.6.0 (#5) allows old versions
Pragma version^0.6.2 (#91) allows old versions
Pragma version^0.6.0 (#235) allows old versions
Pragma version^0.6.0 (#317) allows old versions
Pragma version^0.6.0 (#470) allows old versions
solc-0.6.4 is not recommended for deployment
Deploy with any of the following Solidity versions: 0.5.16 - 0.5.17, 0.6.11 - 0.6.12, 0.7.5 - 0.7.6 Use a simple pragma version that allows any of these versions. Consider using the latest version of Solidity for testing.
Additional information: link
Price for BAT
LASER DESK beta
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