Fluid fTokens

One immutable meta-adapter that reports an account's supply position in any Fluid fToken (an ERC-4626 lending vault).

One immutable meta-adapter that reports an account's supply position in any Fluid fToken (an ERC-4626 lending vault). Each configured fToken contributes a single Supplied leg denominated in the fToken's underlying asset.

• Type: Meta-adapter
• protocolSubId: keccak256("fluid-ftokens")
• Instance key: the fToken (ERC-4626 vault) address, widened to bytes32.
• Source: FluidFTokensMetaBalanceAdapter.sol

---

Positions returned

One leg per configured fToken:

Leg	PositionKind	isDebt	Description
Supply	Supplied	false	The fToken share balance converted to the underlying asset

A leg is dropped when the underlying asset is not registered in NAVCalculator, when the computed amount is zero, or when filtered out by assetFilter.

---

Balance calculation

Fluid fTokens adapter — how the underlying balances reported to the NAV Calculator are derived.

For the fToken at the instance coordinate:

asset  = fToken.asset()
amount = fToken.convertToAssets(fToken.balanceOf(account))

The amount is reported in the underlying asset (asset).

---

Identity

• positionId: abi.encode(address fToken)
• positionKind: Supplied

There is no labels field on the position. The adapter implements positionLabels(positionId), which returns ["Lending", "<fToken symbol()>"] from the fToken's on-chain symbol — surfaced only by the verbose reads (getAccountPositionsVerbose / getAccountNavVerbose); the full breadcrumb is [protocolName, ...labels].

---

Constructor

constructor(address navCalculator_)

Parameter	Description
navCalculator_	NAVCalculator address, used for the registered-asset registry. Must be a contract

---

Registration

Register the adapter with addMetaBalanceAdapter(adapter, instances), then add or remove fTokens with addMetaInstances(adapter, instances) / removeMetaInstances(adapter, instances). The instance coordinate is the fToken (ERC-4626 vault) address widened to bytes32.