Search V2 Pools

Uniswap V2 is now on every evm-compatible chain, and Graviton is now on every Uniswap V2. New pools have started to crop up and we keep up with them at graviton.one stats. For this we use Etherscan, fortunately they keep up with the new evm chains, e.g. polygonscan has appeared just recently. Here’s how I check new pools.

# sushi-eth factory
factory           0xc0aee478e3658e2610c5f7a4a2e1777ce9e4f2ac
# topic0 of the PairCreated event, same on all forks of uniswapV2
PairCreatedTopic0 0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9
# address of our token in bytes32
gton token        0x00000000000000000000000001e0e2e61f554ecaaec0cc933e739ad90f24a86d
# token appeared around this time
fromBlock         12295621 (23 april)
# a spare etherescan.io api key
apikey            MVDAGI47HWEDTM22SNPKHHS5782GWZ8A4R

Now we build a url according to etherscan documentation, searching for all pairs created where GTON is the first token url

https://api.etherscan.io/api
?module=logs&
action=getLogs&
fromBlock=12295621&
toBlock=latest&
address=0xc0aee478e3658e2610c5f7a4a2e1777ce9e4f2ac&
topic0=0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9&
topic1=0x00000000000000000000000001e0e2e61f554ecaaec0cc933e739ad90f24a86d&
apikey=MVDAGI47HWEDTM22SNPKHHS5782GWZ8A4R

And now in the opposite direction, all pairs where GTON is the second token url

https://api.etherscan.io/api
?module=logs&
action=getLogs&
fromBlock=12295621&
toBlock=latest&
address=0xc0aee478e3658e2610c5f7a4a2e1777ce9e4f2ac&
topic0=0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9&
topic2=0x00000000000000000000000001e0e2e61f554ecaaec0cc933e739ad90f24a86d&
apikey=MVDAGI47HWEDTM22SNPKHHS5782GWZ8A4R

We get a json with two pools, gton/weth and gton/usdc. The opposite direction does not return pairs.

Now we can copy the `transactionHash` and paste it into etherscan to get info on the transaction that initiated the pool. https://etherscan.io/tx/0xa097d91a43bf824ca0e44a045dd682fdce07efb66e5d2eaacc64cb5ad1a61d3f

Let’s do the same with pancake

,# pancake factory factory 0xca143ce32fe78f1f7019d7d551a6402fc5350c73 ,# topic0 of the PairCreated event, same on all forks of uniswapV2 PairCreatedTopic0 0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9 ,# address of our token in bytes32 gton token 0x00000000000000000000000064D5BaF5ac030e2b7c435aDD967f787ae94D0205 ,# token appeared around this time fromBlock 7000000 (29 april) ,# a spare bscscan.com api key apikey 8564KSCEASA2M6MP1UHEU54I3NDC787Q4M

url

https://api.bscscan.com/api?
module=logs&
action=getLogs&
fromBlock=4332587&
toBlock=latest&
address=0xca143ce32fe78f1f7019d7d551a6402fc5350c73&
topic0=0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9&
topic1=0x00000000000000000000000064D5BaF5ac030e2b7c435aDD967f787ae94D0205&
apikey=8564KSCEASA2M6MP1UHEU54I3NDC787Q4M

url

https://api.bscscan.com/api?
module=logs&
action=getLogs&
fromBlock=4332587&
toBlock=latest&
address=0xca143ce32fe78f1f7019d7d551a6402fc5350c73&
topic0=0x0d3648bd0f6ba80134a33ba9275ac585d9d315f0ad8355cddefde31afa28d0e9&
topic2=0x00000000000000000000000064D5BaF5ac030e2b7c435aDD967f787ae94D0205&
apikey=8564KSCEASA2M6MP1UHEU54I3NDC787Q4M

Here we get three pools, gton/busd, gton/wbnb and gton/usdc. The opposite direction does not return pairs.