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DocsPolygon Amoyv4 protocol

Vault & shares

YieldVaultV4 is the only contract user funds touch. It issues YLD shares and tracks yield rate.

Interface

YieldVaultV4 issues ymMATIC shares against MATIC deposits, tracks totalAssets() and a public yieldRate() in basis points. Conversions are deterministic and on-chain.

solidity
function deposit(uint256 assets, address receiver) external returns (uint256 shares);
function withdraw(uint256 shares, address receiver) external returns (uint256 assets);
function totalAssets() external view returns (uint256);
function yieldRate()  external view returns (uint256); // basis points
function asset() external view returns (address);

Share math

Shares are minted in proportion to your deposit relative to the live totalAssets() and totalSupply(). The first depositor receives 1:1 shares; later depositors get assets * supply / totalAssets.

ts
const sharesOut =
  totalSupply === 0n
    ? assetsIn
    : (assetsIn * totalSupply) / totalAssets

Events

  • Deposit(caller, owner, assets, shares)
  • Withdraw(caller, receiver, owner, assets, shares)
  • Rebalanced(strategyHash, blockNumber)