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 14820366.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

19525548773
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
17266393705
0x68b3…fc45 (SwapRouter02)
7872596312
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)
6084169169
0xfd43…cc0d
5122609336
0xbaf2…88a7 (MerkleValidator)
4675930074
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
3788055983
0xdac1…1ec7 (TetherToken, Stablecoin, Token Contract, https://tether.to/, Bitfinex, Tether USD (USDT))
3441292036
0x283a…b7f5 (ETHRegistrarController, ETH Registrar Controller, ENS)
3255268435
0xa540…77c1 (OwnableDelegateProxy, WyvernProxyRegistry, OpenSea.io_Registry)
3069668783
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
3015943369
0x7a25…488d (UniswapV2Router02, Router 2)
2878689068
0xfbdd…e655
2720480715
0x88f6…c305
2680165402
0x83c8…aba2 (GemSwap)
2482992487
0xa232…bdcf (FiatTokenV2_1)
2334135581
0x881d…300c (MetaMask, Swap Router)
2083688728
0x1111…097d (AggregationRouterV4)
2039713864
0x0000…0bef
1804239813
0x74de…6631
1688718585
0xdef1…5eff (Zerox Exchange, ZeroEx)

By calls received

544597
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
351351
0xa540…77c1 (OwnableDelegateProxy, WyvernProxyRegistry, OpenSea.io_Registry)
151433
0xdac1…1ec7 (TetherToken, Stablecoin, Token Contract, https://tether.to/, Bitfinex, Tether USD (USDT))
149611
0x68b3…fc45 (SwapRouter02)
145246
0xa232…bdcf (FiatTokenV2_1)
145238
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
126394
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
115604
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)
103383
0xbaf2…88a7 (MerkleValidator)
101723
0x0000…2e1e (Registry with Fallback, ENSRegistryWithFallback)

By calls emitted

435186
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
394704
0x68b3…fc45 (SwapRouter02)
145238
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
131162
0x283a…b7f5 (ETHRegistrarController, ETH Registrar Controller, ENS)
110469
0x7a25…488d (UniswapV2Router02, Router 2)
66428
0xdef1…5eff (Zerox Exchange, ZeroEx)
59058
0x74de…6631
52908
0x57f1…ea85 (Base Registrar Implementation, BaseRegistrarImplementation, Ethereum Name Service (ENS))
49958
0x1111…097d (AggregationRouterV4)
48844
0xa57b…d6cf

By balance

12657234 eth
0x0000…05fa (DepositContract)
5821645 eth
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
796507 eth
0x4ddc…0ed5 (Compound Ether (cETH), CEther, DeFi, Token Contract, cETH Token)
638375 eth
0x011b…d515 (Bridge, Arbitrum, Layer 2, TransparentUpgradeableProxy)
506597 eth
0x07ee…3eca (Contract 1, Exchange, Gemini)
393682 eth
0x8484…2b30 (Polygon (Matic), EtherPredicateProxy, Ether Predicate Proxy, Ether Bridge, Matic Network)
348769 eth
0xde0b…7bae (EthDev, Ethereum Foundation)
341162 eth
0xdc24…7022 (Vyper_contract)
324226 eth
0xdf9e…3d7f (ActivePool)
311863 eth
0xa929…490c (Bridge)

About

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

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