First contract: DIA Oracle: https://blockscout.com/astar/address/0x88463254469c37b9cECb71A34746707e008fb5A9
You can query “getValue()” with argument “ASTR/USD” or “nASTR/USD” to receive the market prices of both. Return values are the price (with 8 decimals, so divide by 10^8 to get the actual price) and unix timestamp of last update.
Prices will update as soon as 1% change is detected.
Second contract: Algem adapter that live connects the ASTR/USD price to onchain collateral information: https://blockscout.com/astar/address/0xCb2158f97367596A68dd1670bC848dc6B2245111
You can query “getNAstrPriceFromCollateralRatio()” (no arguments) to receive this value. It reads ASTR/USD from the oracle and applies the specified formula.
Finally: Please also add funding to the wallet that sends the update transactions to the oracle so that it doesn’t stop due to low funds: 0x7ba30ea9bf8969aab66c08074a587bb5d30452e1
On March 07, 2023, Algem deployed an update of the liquid staking model to launch the liquid staking multipools allowing users to choose the dApp of the Astar Network’s dApp Staking where they want to stake. The model goes from a single dApp for staking to as many dApps as there are in the dApp Staking and consequently, this update leads to the need to upgrade the methodology for calculating the collateral of the nASTR token performed by DIA.
Previous Methodology:
nASTR price using collateral feed will be derived as follows:
nASTR price = ASTR price * (ASTR in staking contract / nASTR total supply)
ASTR in staking contract will be derived by calling function read_staked_amount_on_contract on Astar DappsStaking contract
nASTR total supply will be derived by calling function totalSupply on nASTR token contract
The new Methodology should take into account:
nASTR tokens are minted on each stake call, but now there are more options for bond_and_stake after the update.
To get total ASTR in staking contract, we need to summarize read_staked_amount_on_contract with all the dApps supported by Algem. The staker argument as before is the Algem dapp contract.
To get the list of dApps and iterate over it LiquidStaking contract has the dapps mapping and getDappsList function.
We would like to ask you to provide a new calculation methodology for the nASTR collateral taking into account the above information.
thank you for the update in methodology. We deployed an updated version of the Algem adapter here:
You can call getNAstrPriceFromCollateralRatio() to get the latest price from the collateral ratio and getAstrInAllStakingContracts() to retrieve the number of staked Astr in all registered contracts.
The adapter will always query all contracts in the registry and retrieve the sum of all staked amounts.