Read your rebasing balance

Goal: know your true position when the displayed balance moves every rebase. This assumes you already hold DAT.

See your two balances

# display balance (fragments, 18 dec) — changes every rebase
cast call $DAT "balanceOf(address)(uint256)" $YOU --rpc-url https://rpc.hyperliquid.xyz/evm

# internal balance (1e24 precision) — unchanged by scaling-factor rebases
cast call $DAT "balanceOfInternal(address)(uint256)" $YOU --rpc-url https://rpc.hyperliquid.xyz/evm

# total internal supply
cast call $DAT "initSupply()(uint256)" --rpc-url https://rpc.hyperliquid.xyz/evm

• balanceOf is what wallets and the app show. It is underlying × brilaDatScalingFactor / 1e24.

• balanceOfInternal isolates transfers and rewards from scaling-factor changes.

• Your ownership fraction is approximately balanceOfInternal(you) / initSupply. A treasury mint increases initSupply and can dilute that fraction even though your internal balance is unchanged.

Check whether your share actually grew

To verify that a transfer or farm claim increased your position, compare balanceOfInternal before and after it. A scaling-factor-only rebase leaves this value unchanged.

Estimate USD value

In USD mode the protocol targets $1.00 per DAT, so a quick estimate is:

USD value ≈ balanceOf(you) / 1e18   ×   $1.00

For the rebaser's current TWAP-based signal, call getCurrentExchangeRate() and divide by 1e18 for USD per DAT:

cast call $REBASER "getCurrentExchangeRate()(uint256)" --rpc-url https://rpc.hyperliquid.xyz/evm

This is not a spot-market quote. The view uses the primary reserve/USD feed and can return zero when no time has elapsed since the last TWAP sample. The actual USD-mode rebase path additionally checks the mandatory secondary reserve/USD feed.

See rebase history

Each rebase increments epoch and emits RebaseExecuted(epoch, exchangeRate, targetRate, supplyDelta, timestampSec) (USD mode also emits UsdPegPriceComputed). Query those events, or read the current epoch and brilaDatScalingFactor:

cast call $REBASER "epoch()(uint256)" --rpc-url https://rpc.hyperliquid.xyz/evm
cast call $DAT     "brilaDatScalingFactor()(uint256)" --rpc-url https://rpc.hyperliquid.xyz/evm