Token

Circle Wrapped Bitcoin (cirBTC)

Sponsored

MetaMask

Open a perps trade in seconds on MetaMask Mobile Try Now!

Up to 50x leverage, limit orders, take profit, and stop loss.

eToro

Explore Crypto Start Investing

Explore a diverse range of leading cryptoassets and trade them alongside stocks, ETFs, and more.

MoonPay

Buy Ethereum with 50% off MoonPay Fees, for your first 5 transactionsBuy Now!

T&C's apply, new users only and not for UK users.

Sponsored

BC.GAME

Global Football Season - First Play Protected! Play Now!

Unlock protected play and bonus up to $100! Deposit Bonus up to 1080%

MetaWin

100% BONUS & BEST ODDS on World Cup Outrights Play Now!

Get BEST ODDS on the World Cup & EXCLUSIVE 100% Bonus up to $1,000 with CODE: EE100!

Stake Shield

Claim Insurance on your Multis Claim Now!

Join Aguero, Hazard, Evra & Casillas for Exclusive World Cup Promotions + Daily Bonuses

Sponsored

Сoins.game

100 free spins for registration. Spin now!

Everyday giveaways up to 100 ETH, Lucky Spins. Deposit BONUS 300% and Cashbacks!

BC.GAME

The Best ETH Casino Claim Now!

5000+ Slots & Live Casino Games, 50+cryptos. Register with Etherscan and get 760% deposit bonus. Win Big$, withdraw it fast.

Stake

200% Bonus, Instant Withdrawals, 100K Daily Giveaways, BEST VIP Club Claim Bonus!

20+ Cryptos, 3000+ Slots, Daily & Monthly Bonuses, Exclusive Sports Promos - Provably Fair!

Sponsored

BC.GAME

- The Best ETH Casino Claim Now!

5000+ Slots & Live Casino Games, 50+cryptos. Register with Etherscan and get 760% deposit bonus. Win Big$, withdraw it fast.

CryptoSlots

Provably Fair ETH Casino Games Play now!

Play original casino games with ETH deposits, fast payouts, and provably fair results. Get a 177% deposit bonus + 25 jackpot spins.

Slotland

Play Exclusive Slots with ETH Claim Now!

Deposit with crypto, play original Slotland games, and cash out fast. New players get a $40 free bonus + 200% first deposit bonus.

ERC-20 Source Code (Proxy)

Implementation:

0x43506849...c054402dd

Circle

Wrapped Bitcoin

https://www.circle.com/cirbtc
CoinMarketCap
CoinGecko
Blog
X (Twitter)
LinkedIn
Discord
Whitepaper
Ticketing

API

Check previous token supply
Add Token to MetaMask (Web3)
Update Token Info
Update Name Tag or Label
Submit Burn Details
Report/Flag Address

Overview

Max Total Supply

0.0098304 cirBTC

Holders

8 (0.00%)

Transfers

Market

Price

$0.00 @ 0.000000 ETH

Onchain Market Cap

$0.00

Circulating Supply Market Cap

$0.00

Other Info

Token Contract (WITH 8 Decimals)

0x72dfb2e44f59c5ad2bafe84314e5b99a7cd5075e

Holders
Transfers
Info
Contract
Analytics
Cards

OVERVIEW

Circle Wrapped Bitcoin (cirBTC) unlocks utility for institutional markets. Backed 1:1 by BTC that is readily verifiable onchain, cirBTC will integrate seamlessly into Circle’s established infrastructure and the wider DeFi ecosystem.

Market

Volume (24H)	:	$0.00
Market Capitalization	:	$0.00
Circulating Supply	:	0.00 cirBTC
Market Data Source: Coinmarketcap

Exchange Data Source: Coingecko

#	Exchange	Pair	Price	24H Volume	% Volume

Contract
Read as Proxy
Write as Proxy
Past Implementations

Source Code Verified Exact Match

Proxy

Implementation:

0x43506849...c054402dd

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
Blockscan IDE
Remix IDE

Proxy Checker Similar Contracts

Source
🤖 Code Reader

Contract Source Code (Solidity Standard Json-Input format)

Contract Security Audit

No Contract Security Audit SubmittedSubmit 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)

000000000000000000000000e7b84d8846c96bb83155da5537625c75e42d6e42

-----Decoded View---------------
Arg [0] : implementationContract (address): 0xe7b84D8846c96Bb83155Da5537625c75e42d6E42

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000e7b84d8846c96bb83155da5537625c75e42d6e42

🤖 Code Reader

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

contracts/v1/FiatTokenProxy.sol
contracts/upgradeability/AdminUpgradeabilityProxy.sol
contracts/upgradeability/UpgradeabilityProxy.sol
contracts/upgradeability/Proxy.sol
node_modules/@openzeppelin/contracts/utils/Address.sol

implementation contracts

/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/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-eurc-mainnet-eth/contracts/v2/FiatTokenV2_1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v2/FiatTokenV2.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v2/EIP712Domain.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v2/EIP3009.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v2/EIP2612.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v2/AbstractFiatTokenV2.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1/Pausable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1/Ownable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1/FiatTokenV1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1/Blacklistable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1/AbstractFiatTokenV1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1.1/Rescuable.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/v1.1/FiatTokenV1_1.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/util/SignatureChecker.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/util/MessageHashUtils.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/util/EIP712.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/contracts/util/ECRecover.sol
/Users/aloysius.chan/Repositories/circlefin/stablecoin-evm-private-eurc-mainnet-eth/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.'''

Implementation:

0x43506849...c054402dd

ZeppelinOS

Implementation:

0x43506849...c054402dd

ZeppelinOS

Latest 1 proxy upgrade

Transaction Hash	Block	Age	Implementation	Event	Status
0x1020980c8b7488e332b510d34a7c589dea46f534fe1416415f8a9c0dcf6a612c	24794096	2026-04-02 19:44:23	104 days ago	1775159063	0x43506849...c054402dd	Upgraded	Active

Proxy Contract	Transaction Hash	Block	Age	Proxy Type

[ 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 Etherscan 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. Etherscan 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 Etherscan.

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)

Address Cards

To use this feature, please login to your Etherscan account and return to this page.

Tools & Services

Token

Overview

Max Total Supply

Holders

Transfers

Market

Price

Onchain Market Cap

Circulating Supply Market Cap

Other Info

Token Contract (WITH 8 Decimals)

Contract Name

FiatTokenProxy

Compiler Version

Optimization Enabled

Other Settings

License

Contract Source Code (Solidity Standard Json-Input format)

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)