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 14071054.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

19422877864
0x7be8…d12b (OwnableDelegateProxy, OpenSea.io, Collectibles, NFT, Marketplace, WyvernExchange)
15041795606
0x68b3…fc45 (SwapRouter02)
7840404003
0xf9e2…79f2 (AuthenticatedProxy, OwnableDelegateProxy)
7463877515
0xfbdd…e655
7316994896
0x4161…486b (ServiceV18)
4985600320
0xc02a…6cc2 (Wrapped Ether (WETH), Token Contract, https://weth.io/, Stablecoin, 0x Ecosystem, WrappedEther, WETH9)
4737683631
0xa540…77c1 (OpenSea.io_Registry, OwnableDelegateProxy, WyvernProxyRegistry)
4280811226
0xdac1…1ec7 (Bitfinex, Tether USD (USDT), TetherToken, https://tether.to/, Token Contract, Stablecoin)
4000370692
0xa0b8…eb48 (USD Coin (USDC), https://www.centre.io/, Token Contract, Stablecoin, FiatTokenProxy)
3204111274
0xa232…bdcf (FiatTokenV2_1)
2827515260
0x1111…097d (AggregationRouterV4)
2786144537
0xe6cd…5ef8
2696229897
0x4f0b…867a
2692895032
0x881d…300c (Swap Router, MetaMask)
2692694642
0x7a25…488d (Router 2, UniswapV2Router02)
2458488076
0xdef1…5eff (Zerox Exchange, ZeroEx)
2243028192
0x220b…96d4
2086821534
0x74de…6631
2041817868
0xe592…1564 (SwapRouter)
1957181167
0xd152…2150 (Disperse)

By calls received

558548
0xc02a…6cc2 (Wrapped Ether (WETH), Token Contract, https://weth.io/, Stablecoin, 0x Ecosystem, WrappedEther, WETH9)
355249
0xa540…77c1 (OpenSea.io_Registry, OwnableDelegateProxy, WyvernProxyRegistry)
191620
0xa232…bdcf (FiatTokenV2_1)
191619
0xa0b8…eb48 (USD Coin (USDC), https://www.centre.io/, Token Contract, Stablecoin, FiatTokenProxy)
180143
0xdac1…1ec7 (Bitfinex, Tether USD (USDT), TetherToken, https://tether.to/, Token Contract, Stablecoin)
135191
0x68b3…fc45 (SwapRouter02)
130904
0x7be8…d12b (OwnableDelegateProxy, OpenSea.io, Collectibles, NFT, Marketplace, WyvernExchange)
118619
0xf9e2…79f2 (AuthenticatedProxy, OwnableDelegateProxy)
93718
0xbc53…0de1
92763
0x1a50…b812

By calls emitted

434469
0x7be8…d12b (OwnableDelegateProxy, OpenSea.io, Collectibles, NFT, Marketplace, WyvernExchange)
314715
0x68b3…fc45 (SwapRouter02)
272754
0xfbdd…e655
191620
0xa0b8…eb48 (USD Coin (USDC), https://www.centre.io/, Token Contract, Stablecoin, FiatTokenProxy)
184757
0x1a50…b812
140012
0xcf0c…6a2e
94865
0xdef1…5eff (Zerox Exchange, ZeroEx)
94456
0x7a25…488d (Router 2, UniswapV2Router02)
88944
0x3d66…ef8b
77040
0x7d27…c7a9 (InitializableImmutableAdminUpgradeabilityProxy)

By balance

9190226 eth
0x0000…05fa (DepositContract)
8210367 eth
0xc02a…6cc2 (Wrapped Ether (WETH), Token Contract, https://weth.io/, Stablecoin, 0x Ecosystem, WrappedEther, WETH9)
1261503 eth
0x4ddc…0ed5 (Token Contract, cETH Token, CEther, Compound Ether (cETH), DeFi)
929498 eth
0x61ed…6eea (Gemini 3, Exchange, Cold Wallet)
586353 eth
0xdc24…7022 (Vyper_contract)
533607 eth
0x8484…2b30 (Ether Bridge, Ether Predicate Proxy, Polygon (Matic), Matic Network, EtherPredicateProxy)
458823 eth
0x011b…d515 (Arbitrum, TransparentUpgradeableProxy, Layer 2, Bridge)
411071 eth
0xdf9e…3d7f (ActivePool)
330756 eth
0xa929…490c (Bridge)
207949 eth
0x0c23…1f2d

About

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

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