ETHERSCAN_V2_CHAIN_IDS_FALLBACK

const ETHERSCAN_V2_CHAIN_IDS_FALLBACK: readonly number[]

Defined in: history-evm/src/chains.ts:39

Chain ids https://api.etherscan.io/v2/chainlist listed on 2026-10-14 (63 chains total; only ours kept). Used when the live chainlist cannot be fetched. NOT listed that day: Scroll 534352, zkSync Era 324, Ink 57073, Plume 98866, X Layer 196.

Note (same day): Etherscan v2 answers Missing/Invalid API Key without a key on every chain, and Free API access is not supported for this chain with a free-plan key on Base 8453, OP 10, BSC 56, Avalanche 43114 and Gnosis 100; Celo 42220 shares a community quota (Community Free API Limit reached). Those answers are surfaced as HistoryUnavailableError reasons and trigger the fallbacks below.