Note

Medium Risk
Changes which RPC endpoint validates live balances before pay quotes/submit; misconfigured flags could cause wrong or failed balance reads on affected chains.

Overview
Adds remote feature flag confirmations_pay_extended.excludeChainIdsFromInfura so specific chains can opt out of preferring Infura for live on-chain balance RPCs (e.g. Monad).

Introduces isChainExcludedFromInfura (case-insensitive chain ID match) and wires getLiveTokenBalance to pass preferInfura: false when the chain is listed, so balance queries use the default network client instead of forcing the Infura endpoint. Behavior is unchanged for chains not in the list.

Unit tests cover the flag helper and Infura skip/use paths in live balance fetching; the package changelog documents the change.

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