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 18747231.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

20179577624
0x3fc9…7fad (UniversalRouter)
11194078455
0xc02a…6cc2 (Token Contract, WETH9, Wrapped Ether (WETH), 0x Ecosystem, https://weth.io/, Stablecoin, WrappedEther)
6517556094
0xdac1…1ec7 (Token Contract, Bitfinex, Tether USD (USDT), https://tether.to/, Stablecoin, TetherToken)
6322093370
0xdb58…3216
5994814527
0x7a25…488d (Router 2, UniswapV2Router02)
5889268432
0x80a6…5d9e
5714989067
0x6599…8442
4187533166
0x1111…0582 (AggregationRouterV5)
3891482951
0x0000…8ba3 (Permit2)
3267446655
0xa0b8…eb48 (https://www.centre.io/, USD Coin (USDC), FiatTokenProxy, Token Contract, Stablecoin)
2936667225
0xc626…a277
2867793778
0x881d…300c (MetaMask, MetaSwap, Swap Router)
2826338331
0xdef1…5eff (ZeroEx, Zerox Exchange)
2679510627
0xd19d…876f
2646256161
0xa232…bdcf (FiatTokenV2_1)
2508278727
0xb32c…20b3
2252835701
0x74de…6631
2236801750
0xe37e…bd09
2008861427
0x0645…6fb8 (XENCrypto)
2003228099
0xc364…fe88 (NonfungiblePositionManager)

By calls received

1394829
0xc02a…6cc2 (Token Contract, WETH9, Wrapped Ether (WETH), 0x Ecosystem, https://weth.io/, Stablecoin, WrappedEther)
296653
0xdac1…1ec7 (Token Contract, Bitfinex, Tether USD (USDT), https://tether.to/, Stablecoin, TetherToken)
192499
0x3fc9…7fad (UniversalRouter)
167271
0xa232…bdcf (FiatTokenV2_1)
167048
0xa0b8…eb48 (https://www.centre.io/, USD Coin (USDC), FiatTokenProxy, Token Contract, Stablecoin)
104773
0x4bba…4a4d (Math)
104266
0x7a25…488d (Router 2, UniswapV2Router02)
88543
0x0000…8ba3 (Permit2)
72813
0xc626…a277
55486
0x0645…6fb8 (XENCrypto)

By calls emitted

798444
0x3fc9…7fad (UniversalRouter)
272195
0x80a6…5d9e
250406
0x7a25…488d (Router 2, UniswapV2Router02)
202805
0xdb58…3216
166930
0xa0b8…eb48 (https://www.centre.io/, USD Coin (USDC), FiatTokenProxy, Token Contract, Stablecoin)
129093
0x1111…0582 (AggregationRouterV5)
123912
0xc02a…6cc2 (Token Contract, WETH9, Wrapped Ether (WETH), 0x Ecosystem, https://weth.io/, Stablecoin, WrappedEther)
104819
0x0645…6fb8 (XENCrypto)
104788
0xc626…a277
100525
0xdef1…5eff (ZeroEx, Zerox Exchange)

By balance

34258863 eth
0x0000…05fa (DepositContract)
3133567 eth
0xc02a…6cc2 (Token Contract, WETH9, Wrapped Ether (WETH), 0x Ecosystem, https://weth.io/, Stablecoin, WrappedEther)
1279807 eth
0x8315…ed3a
338361 eth
0xdf9e…3d7f (ActivePool)
319644 eth
0xbeb5…06ed (Proxy)
234849 eth
0x4ddc…0ed5 (DeFi, Token Contract, CEther, Compound Ether (cETH), cETH Token)
196707 eth
0xafcd…c5da
187749 eth
0x8484…2b30 (Ether Bridge, Matic Network, Polygon (Matic), Ether Predicate Proxy, EtherPredicateProxy)
169356 eth
0x3240…0324 (DiamondProxy)
164695 eth
0x4904…e97e (Proxy)

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.