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Errors

DollarStore uses custom errors for gas-efficient reverts with clear failure reasons.

Validation errors​

StablecoinNotSupported​

error StablecoinNotSupported(address stablecoin);

The stablecoin address is not in the supported list. Check isSupported() before calling.

StablecoinAlreadySupported​

error StablecoinAlreadySupported(address stablecoin);

Admin tried to add a stablecoin that's already supported.

ZeroAmount​

error ZeroAmount();

Amount parameter was 0. All operations require non-zero amounts.

ZeroAddress​

error ZeroAddress();

Address parameter was the zero address.

SameStablecoin​

error SameStablecoin();

Swap attempted with same input and output stablecoin. Use deposit/withdraw instead.

Reserve errors​

InsufficientReserves​

error InsufficientReserves(
    address stablecoin,
    uint256 requested,
    uint256 available
);

Not enough reserves for a withdrawal. Check getReserve() first, or use swap with queue option.

InsufficientReservesNoQueue​

error InsufficientReservesNoQueue(
    address stablecoin,
    uint256 requested,
    uint256 available
);

Aggregator swap (swapExactInput) failed due to insufficient reserves. This function never queues—it either fully executes or reverts.

For aggregators: Check getSwapQuote() returns non-zero before calling swapExactInput.

InsufficientDlrsBalance​

error InsufficientDlrsBalance(
    uint256 required,
    uint256 available
);

User doesn't have enough DLRS for the operation.

Queue errors​

QueueFull​

error QueueFull(
    address stablecoin,
    uint256 currentCount
);

Queue has reached maximum capacity (150 positions). Wait for positions to be filled or try later.

QueuePositionNotFound​

error QueuePositionNotFound(uint256 positionId);

The position ID doesn't exist (never created or already removed).

NotPositionOwner​

error NotPositionOwner(
    uint256 positionId,
    address caller,
    address owner
);

Caller tried to cancel a position they don't own.

OrderTooSmall​

error OrderTooSmall(
    uint256 provided,
    uint256 minimum
);

Order amount is below the minimum for current queue depth. Check getMinimumOrderSize() for the current minimum.

Aggregator errors​

DeadlineExpired​

error DeadlineExpired(
    uint256 deadline,
    uint256 currentTime
);

The swapExactInput deadline has passed. Transaction was either delayed or deadline was set too tight.

Admin errors​

OnlyAdmin​

error OnlyAdmin();

Function restricted to admin. Caller is not the current admin.

OnlyPendingAdmin​

error OnlyPendingAdmin();

Only the pending admin can accept admin transfer.

Handling errors​

In Solidity​

try dollarStore.swap(from, to, amount, false) returns (uint256 received, uint256 positionId) {
    // Success
} catch (bytes memory reason) {
    // Decode and handle specific errors
}

In ethers.js/viem​

Custom errors are decoded automatically. Check the error name:

try {
    await dollarStore.swap(from, to, amount, false);
} catch (error) {
    if (error.errorName === 'InsufficientReserves') {
        const { stablecoin, requested, available } = error.errorArgs;
        // Handle insufficient reserves
    }
}