Oko contract explorer

What is Oko?

Oko is an Ethereum explorer focused on smart contracts.
It is intended for a public of experienced Ethereum developers. It was developed to fill a gap in the tools available out there that wouldn't show enough information about smart contracts.

Oko tries to get the source & ABI of verified contracts, and uses Panoramix to decompile contracts without code.
It also tries to interpret the input data for all calls made to contracts, to display it in an understandable form.

How do I use it?

Simply use the search box above. You can enter:

- A contract address
to see source code or decompilation of a contract, calls made from/to it.
- A transaction hash
to see the state modification caused by the transaction, and a tree of the calls made during it.
- A block number
to see basic information about the block, and a list of transactions included in it.

Last block is 14866030.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

21210372366
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
17089524849
0x68b3…fc45 (SwapRouter02)
8425218891
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)
5431204074
0xbaf2…88a7 (MerkleValidator)
4532709454
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
3921574086
0xdac1…1ec7 (TetherToken, Stablecoin, Token Contract, https://tether.to/, Bitfinex, Tether USD (USDT))
3824019727
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
3084657212
0xa232…bdcf (FiatTokenV2_1)
3000410487
0xa540…77c1 (OwnableDelegateProxy, WyvernProxyRegistry, OpenSea.io_Registry)
2992699149
0x7a25…488d (UniswapV2Router02, Router 2)
2625293309
0x881d…300c (MetaMask, Swap Router)
2483613657
0x83c8…aba2 (GemSwap)
2460311962
0x1111…097d (AggregationRouterV4)
2337030868
0x0000…0bef
2226295845
0x283a…b7f5 (ETHRegistrarController, ETH Registrar Controller, ENS)
2064877306
0x74de…6631
1957739928
0x220b…96d4
1943573780
0xdef1…5eff (Zerox Exchange, ZeroEx)
1650692121
0xc99f…e5c5 (WyvernAtomicizer)
1570467567
0x88e6…5640

By calls received

528355
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
381099
0xa540…77c1 (OwnableDelegateProxy, WyvernProxyRegistry, OpenSea.io_Registry)
191406
0xa232…bdcf (FiatTokenV2_1)
191397
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
157382
0xdac1…1ec7 (TetherToken, Stablecoin, Token Contract, https://tether.to/, Bitfinex, Tether USD (USDT))
145224
0x68b3…fc45 (SwapRouter02)
136016
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
126268
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)
113704
0xbaf2…88a7 (MerkleValidator)
65005
0x0000…2e1e (Registry with Fallback, ENSRegistryWithFallback)

By calls emitted

480810
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
361508
0x68b3…fc45 (SwapRouter02)
191397
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
102701
0x7a25…488d (UniswapV2Router02, Router 2)
85202
0x283a…b7f5 (ETHRegistrarController, ETH Registrar Controller, ENS)
75972
0xdef1…5eff (Zerox Exchange, ZeroEx)
65843
0x74de…6631
58067
0x1111…097d (AggregationRouterV4)
56653
0x88e6…5640
52389
0x220b…96d4

By balance

12697284 eth
0x0000…05fa (DepositContract)
5910373 eth
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
756862 eth
0x4ddc…0ed5 (Compound Ether (cETH), CEther, DeFi, Token Contract, cETH Token)
638452 eth
0x011b…d515 (Bridge, Arbitrum, Layer 2, TransparentUpgradeableProxy)
593597 eth
0x07ee…3eca (Contract 1, Exchange, Gemini)
388353 eth
0x8484…2b30 (Polygon (Matic), EtherPredicateProxy, Ether Predicate Proxy, Ether Bridge, Matic Network)
348270 eth
0xde0b…7bae (EthDev, Ethereum Foundation)
336354 eth
0xdf9e…3d7f (ActivePool)
311863 eth
0xa929…490c (Bridge)
308632 eth
0xdc24…7022 (Vyper_contract)

About

An experiment by palkeo. Feel free to contact me at oko@palkeo.com.

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