npm install
You can start the liquidity fetch by running this:
node ./src/LiquidityFetcher.js
The default config make it fetch the liquidity values for the pool cbETH/ETH
If the data file already exists, just fetch from the last block fetched to the most current block.
You can see the presaved configs in ./src/config.js in the variable pairsConfig
const pairsConfig = {
cbETHETH: {
poolAddress: '0x840DEEef2f115Cf50DA625F7368C24af6fE74410',
deployedBlock: 15404282,
token0: 'cbETH',
token1: 'WETH',
fees: 500
},
LDOETH: {
poolAddress: '0xa3f558aebaecaf0e11ca4b2199cc5ed341edfd74',
deployedBlock: 12512163,
token0: 'LDO',
token1: 'WETH',
fees: 3000
}
};
To change the config, you have to go on the first lines of the ./src/LiquidityFetcher.js file, here you will see this:
////////////// CONFIGURATION ////////////////////
const rpcUrl = 'https://eth-mainnet.rpcfast.com?api_key=xbhWBI1Wkguk8SNMu1bvvLurPGLXmgwYeC4S6g2H7WdwFigZSmPWVZRxrskEQwIf'; // --> use infura for a faster fetch
const chosenConfig = pairsConfig.cbETHETH;
////////////// CONFIGURATION ////////////////////
Update the rpcURL (if needed, this one if public and works quite well) and select the pairConfig you want using pairsConfig.xxx
The script generate a .json file, example cbETH-WETH-500-data.json containing all the ticks liquidities (and few other infos).
To compute data you just have to start the TickComputer by running:
node ./src/TickComputer.js X with X = number of ticks to include. The more you includes, the most close to the total liquidity available in the pool you should have
It will start the function TickComputer and compute the liquidity of the cbETH/ETH pool for 5 ticks. You can change the parameter in the code directly.
Example when running this function with 10 tickCount:
Starting tick computer, starting tick: 470
470[MIX]: xLiquidity at tick: 1530.560388670967. New total: 1530.560388670967
480[ONLY X]: xLiquidity at tick: 1609.4485202008145. New total: 3140.0089088717814
490[ONLY X]: xLiquidity at tick: 155.9286209878109. New total: 3295.9375298595924
500[ONLY X]: xLiquidity at tick: 22.499112185702415. New total: 3318.436642045295
510[ONLY X]: xLiquidity at tick: 63.15006218285732. New total: 3381.586704228152
520[ONLY X]: xLiquidity at tick: 57.817982824251715. New total: 3439.404687052404
530[ONLY X]: xLiquidity at tick: 1.9251248176136522. New total: 3441.3298118700177
540[ONLY X]: xLiquidity at tick: 1.9241625439065722. New total: 3443.2539744139244
550[ONLY X]: xLiquidity at tick: 1.363688533206827. New total: 3444.617662947131
560[ONLY X]: xLiquidity at tick: 1.3630068934456392. New total: 3445.980669840577
------------------------------------
470[MIX]: yLiquidity at tick: 79.41690841688289. New total: 79.41690841688289
460[ONLY Y]: yLiquidity at tick: 1261.6318420975094. New total: 1341.0487505143924
450[ONLY Y]: yLiquidity at tick: 56.98332411828772. New total: 1398.0320746326802
440[ONLY Y]: yLiquidity at tick: 7.796191062484376. New total: 1405.8282656951646
430[ONLY Y]: yLiquidity at tick: 7.731558122957917. New total: 1413.5598238181226
420[ONLY Y]: yLiquidity at tick: 6.506433656394693. New total: 1420.0662574745172
410[ONLY Y]: yLiquidity at tick: 1.0345688979165548. New total: 1421.1008263724339
400[ONLY Y]: yLiquidity at tick: 1.0341600359952086. New total: 1422.134986408429
390[ONLY Y]: yLiquidity at tick: 0.9467704240452801. New total: 1423.0817568324744
380[ONLY Y]: yLiquidity at tick: 0.9650990439201952. New total: 1424.0468558763946
TotalX (cbETH) available in 10 ticks: 3445.980669840577
TotalY (ETH) available in 10 ticks: 1424.0468558763946
It will also display how much balance there is in the pool You can then compare the results with what is in the pool: https://etherscan.io/address/0x840DEEef2f115Cf50DA625F7368C24af6fE74410
The get dx function is also called to see the result it output for a very big amount of y (100_000 units in the code)