syrupUSDC

Custom price feed for Maple Finance syrupUSDC on Ethereum mainnet.

Custom price feed for Maple Finance syrupUSDC on Ethereum mainnet. syrupUSDC is an ERC-4626 vault share representing a deposit in Maple's USDC lending pool. The price is derived from the vault's current share-to-USDC conversion rate multiplied by the USDC/USD price read from the NAV's own primary feed.

Source: syrupUSDC_CustomPriceFeed.sol

Mainnet feed. The L2 deployments use a different oracle composition — see syrupUSDC (L2).

The USDC/USD term is sourced from the NAV's own selector — see Base/USD from the NAV's own selector.

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Approach

syrupUSDC.convertToAssets(1 syrupUSDC) × USDC/USD (from the NAV's primary feed via getPriceDataNoDivergence(USDC))

syrupUSDC (Mainnet) price feed — how its oracle inputs compose into a USD price, with the staleness gate.

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Price calculation

decimals = syrupUSDC.decimals()                       // vault share decimals
rate     = syrupUSDC.convertToAssets(10^decimals)     // USDC per 1 syrupUSDC (vault decimals)
price    = rate × USDC_USD / 10^decimals

Input	Source	Description
convertToAssets()	IERC4626(syrupUSDC)	USDC backing per 1 syrupUSDC at the current vault exchange rate
USDC_USD	NAV base — getPriceDataNoDivergence(USDC) (8 dec)	the NAV's primary USDC/USD price

Vault decimals are read once at deploy. Result carries the feed's 8 decimals.

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Constructor

constructor(
    address syrupUsdc_,
    address nav_,
    address baseAsset_
)

Parameter	Description
syrupUsdc_	The syrupUSDC vault address (also used to read vault decimals)
nav_	NAVCalculator (proxy) — supplies the base stablecoin's USD price via getPriceDataNoDivergence
baseAsset_	The registered base stablecoin whose USD price is read (USDC); must equal the vault's asset() — reverts BaseAssetMismatch otherwise

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Staleness

The price is stale if the base USD price is ≤ 0, or if the NAV reports the base asset (USDC) stale — all its feeds stale. The base leg's updatedAt comes from the NAV's selected USDC feed. The convertToAssets rate has no heartbeat — it is a live view on the ERC-4626 vault.

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Chains

Deployed on Ethereum mainnet only. L2 deployments use syrupUSDC (L2), which relies on a Chainlink syrupUSDC/USDC feed instead.