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 13747121.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

12016368857
0x7a25…488d (Router 2, UniswapV2Router02)
10787512023
0xe592…1564 (SwapRouter)
8941722471
0x7be8…d12b (NFT, Collectibles, OwnableDelegateProxy, Marketplace, OpenSea.io, WyvernExchange)
6823457271
0xdac1…1ec7 (Tether USD (USDT), Token Contract, Stablecoin, Bitfinex, TetherToken, https://tether.to/)
6398273407
0xc02a…6cc2 (https://weth.io/, 0x Ecosystem, Wrapped Ether (WETH), Token Contract, Stablecoin, WETH9, WrappedEther)
4632430532
0xa0b8…eb48 (FiatTokenProxy, Token Contract, Stablecoin, https://www.centre.io/, USD Coin (USDC))
4335970136
0xf9e2…79f2 (OwnableDelegateProxy, AuthenticatedProxy)
3978836748
0xfbdd…e655
3902452443
0x4161…486b (ServiceV18)
3743724638
0x881d…300c (Swap Router, MetaMask)
3726429234
0x999e…d3ab (WnD)
3721568720
0xa232…bdcf (FiatTokenV2_1)
3391645824
0xdef1…5eff (ZeroEx, Zerox Exchange)
2957686655
0x1111…097d (AggregationRouterV4)
2899166726
0x74de…6631
2617379830
0xf042…2281
2381706314
0x220b…96d4
2301169979
0x1c51…d732
1938244221
0xa540…77c1 (OwnableDelegateProxy, WyvernProxyRegistry, OpenSea.io_Registry)
1639824418
0x41cb…1784

By calls received

700897
0xc02a…6cc2 (https://weth.io/, 0x Ecosystem, Wrapped Ether (WETH), Token Contract, Stablecoin, WETH9, WrappedEther)
266970
0xdac1…1ec7 (Tether USD (USDT), Token Contract, Stablecoin, Bitfinex, TetherToken, https://tether.to/)
201937
0xa232…bdcf (FiatTokenV2_1)
201920
0xa0b8…eb48 (FiatTokenProxy, Token Contract, Stablecoin, https://www.centre.io/, USD Coin (USDC))
151578
0xe592…1564 (SwapRouter)
148327
0xa540…77c1 (OwnableDelegateProxy, WyvernProxyRegistry, OpenSea.io_Registry)
136623
0x999e…d3ab (WnD)
103909
0x7a25…488d (Router 2, UniswapV2Router02)
55937
0x6b17…1d0f (Dai Stablecoin (DAI), Maker, Token Contract, DeFi)
54094
0x7be8…d12b (NFT, Collectibles, OwnableDelegateProxy, Marketplace, OpenSea.io, WyvernExchange)

By calls emitted

355810
0x7a25…488d (Router 2, UniswapV2Router02)
201920
0xa0b8…eb48 (FiatTokenProxy, Token Contract, Stablecoin, https://www.centre.io/, USD Coin (USDC))
192133
0xe592…1564 (SwapRouter)
183656
0x7be8…d12b (NFT, Collectibles, OwnableDelegateProxy, Marketplace, OpenSea.io, WyvernExchange)
147040
0xfbdd…e655
132082
0xdef1…5eff (ZeroEx, Zerox Exchange)
119923
0xf042…2281
100699
0x1a50…b812
90793
0x74de…6631
82432
0x1111…097d (AggregationRouterV4)

By balance

8520850 eth
0x0000…05fa (DepositContract)
7573141 eth
0xc02a…6cc2 (https://weth.io/, 0x Ecosystem, Wrapped Ether (WETH), Token Contract, Stablecoin, WETH9, WrappedEther)
1550641 eth
0x4ddc…0ed5 (Compound Ether (cETH), cETH Token, Token Contract, DeFi, CEther)
512379 eth
0xdf9e…3d7f (ActivePool)
496660 eth
0xdc24…7022 (Vyper_contract)
413776 eth
0x8484…2b30 (EtherPredicateProxy, Ether Predicate Proxy, Matic Network, Polygon (Matic), Ether Bridge)
411787 eth
0xa929…490c (Bridge)
331760 eth
0x011b…d515 (Arbitrum, Bridge, Layer 2, TransparentUpgradeableProxy)
292345 eth
0xbddf…12be
194176 eth
0x1db9…fcf4

About

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

Thanks to my generous Ethereum hosting provider for a spot in his attic. Powered by a free-range Internet.