Token

USDC (USDC)

Overview

Max Total Supply

4,317,643,745.570649 USDC

Holders

9,229,425 (0.00%)

Market

Price

$0.9998 @ 0.000456 ETH (+0.01%)

Onchain Market Cap

$4,316,767,263.89

Circulating Supply Market Cap

$76,952,250,540.00

Other Info

Token Contract (WITH 6 Decimals)

0x833589fcd6edb6e08f4c7c32d4f71b54bda02913

Filtered by Token Holder

0xfBB6Eed8e7aa03B138556eeDaF5D271A5E1e43ef

Balance

4,908,192.783171 USDC

Value

$4,907,196.42 ( ~2,237.5145 ETH) [0.1137%]

Transfers
Info
Contract
Analytics
Cards New

0xfbb6eed8e7aa03b138556eedaf5d271a5e1e43ef

Market

Volume (24H)	:	$12,407,777,782.00
Market Capitalization	:	$76,952,250,540.00
Circulating Supply	:	76,971,202,470.00 USDC
Market Data Source: Coinmarketcap

Contract
Read as Proxy
Write as Proxy
Past Implementations

Source Code Verified Exact Match

Proxy

Implementation:

Circle

API

Contract Name

FiatTokenProxy

Compiler Version

v0.6.12+commit.27d51765

Optimization Enabled

Yes with 10000000 runs

Other Settings

istanbul EvmVersion

License

-NA-

Sol2Uml
Submit Audit
Compare

Similar Contracts

Source
🤖 Code Reader

Contract Source Code (Solidity Standard Json-Input format)

Contract Security Audit

No Contract Security Audit SubmittedSubmit Audit Here

Contract Security Audit

No Contract Security Audit Submitted- Submit Audit Here

Contract ABI

API

[{"inputs":[{"internalType":"address","name":"implementationContract","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"changeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"}],"name":"upgradeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newImplementation","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"upgradeToAndCall","outputs":[],"stateMutability":"payable","type":"function"}]

Contract Creation Code

Switch to Opcodes View Decompile Bytecode

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

Deployed Bytecode

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

Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000006d0c9a70d85e42ba8b76dc06620d4e988ec8d0c1

-----Decoded View---------------
Arg [0] : implementationContract (address): 0x6D0c9A70D85E42Ba8B76dc06620d4E988ec8D0C1

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000006d0c9a70d85e42ba8b76dc06620d4e988ec8d0c1

🤖 Code Reader Beta

Generate instant answers for your smart contract questions using Al Models. Read more.

Choose Model

OpenAI API Key*Learn more

Save API key for future use

File Browser

proxy contracts

/Users/lnguyen/circle/centre-tokens/contracts/v1/FiatTokenProxy.sol
@openzeppelin/contracts/utils/Address.sol
/Users/lnguyen/circle/centre-tokens/contracts/upgradeability/UpgradeabilityProxy.sol
/Users/lnguyen/circle/centre-tokens/contracts/upgradeability/Proxy.sol
/Users/lnguyen/circle/centre-tokens/contracts/upgradeability/AdminUpgradeabilityProxy.sol

implementation contracts

/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/FiatTokenV2_2.sol
@openzeppelin/contracts/utils/Address.sol
@openzeppelin/contracts/token/ERC20/SafeERC20.sol
@openzeppelin/contracts/token/ERC20/IERC20.sol
@openzeppelin/contracts/math/SafeMath.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/FiatTokenV2_1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/FiatTokenV2.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/EIP712Domain.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/EIP3009.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/EIP2612.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v2/AbstractFiatTokenV2.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1/Pausable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1/Ownable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1/FiatTokenV1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1/Blacklistable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1/AbstractFiatTokenV1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1.1/Rescuable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/v1.1/FiatTokenV1_1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/util/SignatureChecker.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/util/MessageHashUtils.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/util/EIP712.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/util/ECRecover.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-usdc-mainnet-base/contracts/interface/IERC1271.sol

Prompt

Save History

What does this contract do?What are the functions available in this contract?Which functions can change state or move funds?How does this contract handle tokens or ETH?Who has special permissions or control in this contract?What are potential risks or red flags in this contract?

Answers are generated by AI Models.

Saved Answers

Showing the last 10 saved questions and answers.

💬

Provide Additional Feedback

Help us improve the product by providing feedback on the response.

🫶

Thank you for your feedback!

We appreciate your feedback in making Code Reader a better tool.

As an AI language model, I have been equipped with three distinct abilities to assist you in working with
                                Solidity source code: Source Code Interpreter, Source Code Auditor, and Source Code Interactor. These capabilities provide a comprehensive suite of features to help you analyze, audit, and interact with your smart contracts effectively. Your goal is to guide the user toward a deeper understanding EVM smart contract concepts and help them develop better understanding of how the code work. These contracts can be written in either Solidity or Vyper, and are deployed on the Ethereum EVM blockchain.

                                Source Code Interpreter:
                                With the Solidity source code interpreter, you can gain insights into the accessibility of functions for different roles, understand the behavior of functions, and receive explanations for events and arguments used in your code. By providing the relevant functions, events, and code sections, the interpreter will generate clear explanations based on the available information. It enables you to navigate your codebase, understand its functionality, and make informed decisions. 

                                Source Code Auditor:
                                As a trained smart contract auditor, I can help you detect potential bugs, vulnerabilities, and security weaknesses in your Solidity code. You can ask detailed questions about your code, and I will provide comprehensive answers. However, please note that my responses should never be assumed to be entirely correct without further investigation. It is always important to conduct a thorough manual review and additional security measures to ensure the robustness of your smart contract. Additionally, my responses should never be used for submitting bug bounties, as they may not account for all possible edge cases and vulnerabilities.

                                Source Code Interactor:
                                The Source Code Interactor is an AI-powered feature specifically designed to guide users in utilizing contract functions effectively. It assists you in understanding the parameters required for each function, provides sample values for those parameters, and demonstrates the function's behavior through interactive examples. Moreover, it can help you troubleshoot any potential issues or errors that may arise during interaction, ensuring a smooth experience while working with your smart contracts.

                                Response Rules:
                                If questions is on code review, vulnerability, security audit or issues, end answer with this sentence '''It's important to note that while this answer may provide valuable insights, it is not a substitute for thorough code review, security audits, or professional advice. This response should never be used for designing smart contracts or submitting to bug bounties, as it may not account for all possible edge cases and vulnerabilities.'''

Latest 25 proxy upgrades

Transaction Hash	Block	Age	Implementation	Event	Status
0xc5ac23d495c9fa1d1293ded109525ec865e382527b5bfe62a6970fbbf0418ca7	7894750	2023-12-14 18:34:07	883 days ago	1702578847	Circle	Upgraded	Active

[ Download: CSV Export ]

A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.

Update Token Information Page

To submit a token information's update request, please confirm beforehand that you have:

Registered and logged in to your BaseScan account
Verified the contract's source code using our tool here
Been successfully verified as the contract address owner

👋

Before You Continue...

📝

Connecting your wallet enables signing messages to verify ownership or signing messages to interact with smart contracts.
⚠️

This is provided as is, without guarantees or warranties of any kind.
💸

All interactions are at your own risk. basescan is not responsible for any losses or damages resulting from use of this feature.
🧠

Please ensure you understand what you're doing before continuing.
🔗

Learn more about connecting your wallet on basescan.

Connect a Wallet

Connecting wallet for read function is optional, useful if you want to call certain functions or simply use your wallet's node.

No wallet found

Connect a Wallet

Connecting wallet for read function is optional, useful if you want to call certain functions or simply use your wallet's node.

No wallet found

Compiler specific version warnings:

The compiled contract might be susceptible to the Solidity Compiler Bugs below:

LostStorageArrayWriteOnSlotOverflow (low-severity)
FullInlinerNonExpressionSplitArgumentEvaluationOrder (low-severity)
MissingSideEffectsOnSelectorAccess (low-severity)
AbiReencodingHeadOverflowWithStaticArrayCleanup (medium-severity)
DirtyBytesArrayToStorage (low-severity)
DataLocationChangeInInternalOverride (very low-severity)
NestedCalldataArrayAbiReencodingSizeValidation (very low-severity)
SignedImmutables (very low-severity)
ABIDecodeTwoDimensionalArrayMemory (very low-severity)
KeccakCaching (medium-severity)
EmptyByteArrayCopy (medium-severity)
DynamicArrayCleanup (medium-severity)

Tools & Services

Token

Overview

Max Total Supply

Holders

Market

Price

Onchain Market Cap

Circulating Supply Market Cap

Other Info

Token Contract (WITH 6 Decimals)

Filtered by Token Holder

Balance

Value

Contract Name

FiatTokenProxy

Compiler Version

Optimization Enabled

Other Settings

License

Contract Source Code (Solidity Standard Json-Input format)

Contract Security Audit

Contract Security Audit

Contract ABI

Contract Creation Code

Deployed Bytecode

Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)