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 13770277.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

14202124199
0x7a25…488d (UniswapV2Router02, Router 2)
10623467994
0x7be8…d12b (OwnableDelegateProxy, Collectibles, Marketplace, NFT, WyvernExchange, OpenSea.io)
8454017815
0xe592…1564 (SwapRouter)
6096726449
0xc02a…6cc2 (https://weth.io/, Stablecoin, WrappedEther, WETH9, Wrapped Ether (WETH), Token Contract, 0x Ecosystem)
5962535478
0xdac1…1ec7 (Tether USD (USDT), Stablecoin, https://tether.to/, TetherToken, Bitfinex, Token Contract)
4724510905
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)
4193070717
0xfbdd…e655
4106696356
0x4161…486b (ServiceV18)
3894066901
0xa0b8…eb48 (FiatTokenProxy, Stablecoin, USD Coin (USDC), https://www.centre.io/, Token Contract)
3306509367
0x881d…300c (MetaMask, Swap Router)
3123333140
0xa232…bdcf (FiatTokenV2_1)
2906496782
0xdef1…5eff (Zerox Exchange, ZeroEx)
2778118543
0xa540…77c1 (WyvernProxyRegistry, OwnableDelegateProxy, OpenSea.io_Registry)
2567874739
0x74de…6631
2547990155
0x1111…097d (AggregationRouterV4)
1949433068
0x220b…96d4
1883239247
0x999e…d3ab (WnD)
1716496898
0x1c51…d732 (WnDGameCR)
1677639909
0xf042…2281 (Tower)
1576494236
0x283a…b7f5 (ENS, ETH Registrar Controller, ETHRegistrarController)

By calls received

651533
0xc02a…6cc2 (https://weth.io/, Stablecoin, WrappedEther, WETH9, Wrapped Ether (WETH), Token Contract, 0x Ecosystem)
234110
0xdac1…1ec7 (Tether USD (USDT), Stablecoin, https://tether.to/, TetherToken, Bitfinex, Token Contract)
183055
0xa540…77c1 (WyvernProxyRegistry, OwnableDelegateProxy, OpenSea.io_Registry)
171376
0xa232…bdcf (FiatTokenV2_1)
171365
0xa0b8…eb48 (FiatTokenProxy, Stablecoin, USD Coin (USDC), https://www.centre.io/, Token Contract)
118817
0x7a25…488d (UniswapV2Router02, Router 2)
117367
0xe592…1564 (SwapRouter)
94909
0x999e…d3ab (WnD)
69201
0x7be8…d12b (OwnableDelegateProxy, Collectibles, Marketplace, NFT, WyvernExchange, OpenSea.io)
61172
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)

By calls emitted

404075
0x7a25…488d (UniswapV2Router02, Router 2)
221336
0x7be8…d12b (OwnableDelegateProxy, Collectibles, Marketplace, NFT, WyvernExchange, OpenSea.io)
171365
0xa0b8…eb48 (FiatTokenProxy, Stablecoin, USD Coin (USDC), https://www.centre.io/, Token Contract)
151411
0xfbdd…e655
149876
0xe592…1564 (SwapRouter)
115749
0xdef1…5eff (Zerox Exchange, ZeroEx)
94758
0x1a50…b812
86084
0xf042…2281 (Tower)
79891
0x74de…6631
70826
0x1111…097d (AggregationRouterV4)

By balance

8580850 eth
0x0000…05fa (DepositContract)
7437118 eth
0xc02a…6cc2 (https://weth.io/, Stablecoin, WrappedEther, WETH9, Wrapped Ether (WETH), Token Contract, 0x Ecosystem)
1537180 eth
0x4ddc…0ed5 (CEther, cETH Token, DeFi, Token Contract, Compound Ether (cETH))
510383 eth
0xdf9e…3d7f (ActivePool)
484217 eth
0xdc24…7022 (Vyper_contract)
430942 eth
0x8484…2b30 (Polygon (Matic), Ether Bridge, EtherPredicateProxy, Ether Predicate Proxy, Matic Network)
411787 eth
0xa929…490c (Bridge)
347741 eth
0x07ee…3eca (Exchange, Contract 1, Gemini)
323403 eth
0x011b…d515 (Layer 2, TransparentUpgradeableProxy, Bridge, Arbitrum)
292578 eth
0xbddf…12be

About

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

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