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 15020450.

You can also simulate arbitrary calls.

Top active contracts

Aggregate measures over the last 10000 blocks.

By gas usage

16346811735
0x68b3…fc45 (SwapRouter02)
11812185588
0x0000…e581 (Seaport)
4724585747
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
4700547094
0xdac1…1ec7 (TetherToken, Stablecoin, Token Contract, https://tether.to/, Bitfinex, Tether USD (USDT))
4588990498
0x1e00…3c71
4134833369
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
3331325172
0xa232…bdcf (FiatTokenV2_1)
3047927427
0x83c8…aba2 (GemSwap)
2915477804
0x1111…097d (AggregationRouterV4)
2914432587
0xfbdd…e655
2823519195
0x4056…a000
2785707802
0x7a25…488d (UniswapV2Router02, Router 2)
2700101906
0x220b…96d4
2520340204
0xb890…727f (L1_ETH_Bridge)
2298475056
0x881d…300c (MetaMask, Swap Router)
1955493054
0x7f26…38e5 (WyvernExchangeWithBulkCancellations)
1942547040
0xe7b4…aa7a
1929111729
0xdef1…5eff (Zerox Exchange, ZeroEx)
1874577219
0x4dbd…ab3f (Bridge, Inbox, Arbitrum, Layer 2)
1776216615
0x74de…6631

By calls received

543105
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
199064
0xa232…bdcf (FiatTokenV2_1)
199052
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
192657
0xdac1…1ec7 (TetherToken, Stablecoin, Token Contract, https://tether.to/, Bitfinex, Tether USD (USDT))
136314
0x68b3…fc45 (SwapRouter02)
101369
0x004c…0c00 (PausableZone)
80549
0x0000…e581 (Seaport)
69517
0x1e00…3c71
53653
0x1a50…b812
53653
0x2a8e…a2c4

By calls emitted

328387
0x68b3…fc45 (SwapRouter02)
199052
0xa0b8…eb48 (FiatTokenProxy, https://www.centre.io/, Stablecoin, USD Coin (USDC), Token Contract)
176957
0x0000…e581 (Seaport)
106235
0x1a50…b812
102986
0x1e00…3c71
98673
0x7a25…488d (UniswapV2Router02, Router 2)
73751
0xdef1…5eff (Zerox Exchange, ZeroEx)
70301
0xfbdd…e655
66981
0x283a…b7f5 (ETHRegistrarController, ETH Registrar Controller, ENS)
66169
0x220b…96d4

By balance

12955445 eth
0x0000…05fa (DepositContract)
4808308 eth
0xc02a…6cc2 (WrappedEther, Stablecoin, WETH9, 0x Ecosystem, Token Contract, https://weth.io/, Wrapped Ether (WETH))
690145 eth
0x07ee…3eca (Contract 1, Exchange, Gemini)
657564 eth
0x4ddc…0ed5 (Compound Ether (cETH), CEther, DeFi, Token Contract, cETH Token)
656713 eth
0x011b…d515 (Bridge, Arbitrum, Layer 2, TransparentUpgradeableProxy)
351859 eth
0xdf9e…3d7f (ActivePool)
335725 eth
0x8484…2b30 (Polygon (Matic), EtherPredicateProxy, Ether Predicate Proxy, Ether Bridge, Matic Network)
316461 eth
0xa929…490c (Bridge)
196773 eth
0xbddf…12be
196000 eth
0xa160…f291 (Tornado.cash, TornadoCash_eth, 100 ETH)

About

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

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