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 14025471.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

27352508448
0x7be8…d12b (OwnableDelegateProxy, OpenSea.io, Collectibles, NFT, Marketplace, WyvernExchange)
17724727335
0x68b3…fc45 (SwapRouter02)
11075356830
0xf9e2…79f2 (AuthenticatedProxy, OwnableDelegateProxy)
7127752972
0xfbdd…e655
6996054118
0x4161…486b (ServiceV18)
5246091608
0xa540…77c1 (OpenSea.io_Registry, OwnableDelegateProxy, WyvernProxyRegistry)
4838645449
0xc02a…6cc2 (Wrapped Ether (WETH), Token Contract, https://weth.io/, Stablecoin, 0x Ecosystem, WrappedEther, WETH9)
3286596797
0x7a25…488d (Router 2, UniswapV2Router02)
3074054323
0xdac1…1ec7 (Bitfinex, Tether USD (USDT), TetherToken, https://tether.to/, Token Contract, Stablecoin)
2622204013
0x881d…300c (Swap Router, MetaMask)
2338726012
0xa0b8…eb48 (USD Coin (USDC), https://www.centre.io/, Token Contract, Stablecoin, FiatTokenProxy)
2030698002
0xdef1…5eff (Zerox Exchange, ZeroEx)
1998599102
0x74de…6631
1879319080
0xa232…bdcf (FiatTokenV2_1)
1846223173
0x1111…097d (AggregationRouterV4)
1619923100
0x0a26…4f07 (GenieSwap)
1573156113
0xbcd7…12ce (FeeSharingSystem)
1489015593
0xa8b5…3d39 (OpenSeaMarket)
1434305561
0xe592…1564 (SwapRouter)
1224965017
0xd9e1…8b9f (SushiSwap, UniswapV2Router02)

By calls received

521335
0xc02a…6cc2 (Wrapped Ether (WETH), Token Contract, https://weth.io/, Stablecoin, 0x Ecosystem, WrappedEther, WETH9)
493396
0xa540…77c1 (OpenSea.io_Registry, OwnableDelegateProxy, WyvernProxyRegistry)
179308
0x7be8…d12b (OwnableDelegateProxy, OpenSea.io, Collectibles, NFT, Marketplace, WyvernExchange)
162053
0xf9e2…79f2 (AuthenticatedProxy, OwnableDelegateProxy)
149958
0x68b3…fc45 (SwapRouter02)
120114
0xdac1…1ec7 (Bitfinex, Tether USD (USDT), TetherToken, https://tether.to/, Token Contract, Stablecoin)
104590
0xa232…bdcf (FiatTokenV2_1)
104587
0xa0b8…eb48 (USD Coin (USDC), https://www.centre.io/, Token Contract, Stablecoin, FiatTokenProxy)
86299
0x1a50…b812
86299
0x5454…647f (StrongNFTBonusV8)

By calls emitted

606130
0x7be8…d12b (OwnableDelegateProxy, OpenSea.io, Collectibles, NFT, Marketplace, WyvernExchange)
374575
0x68b3…fc45 (SwapRouter02)
262592
0xfbdd…e655
172408
0x1a50…b812
112326
0x7a25…488d (Router 2, UniswapV2Router02)
104587
0xa0b8…eb48 (USD Coin (USDC), https://www.centre.io/, Token Contract, Stablecoin, FiatTokenProxy)
83161
0xdef1…5eff (Zerox Exchange, ZeroEx)
83022
0x3d66…ef8b
65862
0x74de…6631
55644
0x1111…097d (AggregationRouterV4)

By balance

9052754 eth
0x0000…05fa (DepositContract)
7699828 eth
0xc02a…6cc2 (Wrapped Ether (WETH), Token Contract, https://weth.io/, Stablecoin, 0x Ecosystem, WrappedEther, WETH9)
1305948 eth
0x4ddc…0ed5 (Token Contract, cETH Token, CEther, Compound Ether (cETH), DeFi)
615286 eth
0xdc24…7022 (Vyper_contract)
539608 eth
0x8484…2b30 (Ether Bridge, Ether Predicate Proxy, Polygon (Matic), Matic Network, EtherPredicateProxy)
495877 eth
0xdf9e…3d7f (ActivePool)
427857 eth
0x011b…d515 (Arbitrum, TransparentUpgradeableProxy, Layer 2, Bridge)
336435 eth
0xa929…490c (Bridge)
127800 eth
0xa160…f291 (100 ETH, TornadoCash_eth, Tornado.cash)
123786 eth
0xcafe…d12b (Pool)

About

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

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