Should existing token approvals decide which aggregator I use?

An existing allowance is a convenience, not a reason to keep using a provider you would otherwise reject. It can remove a new approval step for the same token, spender and network, but it also represents permission that may remain after the last trade.

First separate historical expenditure from the next decision. Gas paid for an old approval is already spent. The relevant saving is only the approval transaction you would otherwise need now. That economic distinction is covered in approval sunk costs.

Compare permissions before comparing convenience

A saved allowance belongs to a contract address, not simply a brand. Velora’s deployment reference separates product contracts, while OKX’s 2026 changelog records router updates. Switching mode or version can therefore require a different spender even when the interface looks familiar.

Ask whether the old permission is limited to the amount you still intend to trade or remains broadly available. If the provider has changed or you no longer intend to use that contract, inspect the outstanding allowance separately from the new quote.

A practical decision sequence

1. Eliminate routes whose contract, account support or delivery terms you do not accept.
2. Compare the remaining quotes, including any new approval cost.
3. Choose the allowance amount deliberately if approval is required.
4. Review obsolete permissions after changing providers.

Trezor Suite’s DEX flow illustrates the choice between unlimited and specific-amount approvals. FoxWallet’s approval tool illustrates reviewing, reducing or revoking existing permissions. These are separate capabilities from finding a swap quote.

A marginally better quote should not make a permission you do not understand acceptable. Equally, an old approval is not proof of compromise. Treat the retained access as an explicit trust decision, then assess the cost of the trade you actually plan to make.