Gas tracker, multichain gas. One call for current gas prices on Base, Ethereum, Arbitrum, Optimism and Polygon: gas price, base fee and priority fee in gwei and what a plain transfer costs in the native coin and, for the ETH chains, in US dollars (Uniswap ETH price), sorted cheapest first, plus Bitcoin fee rates in sat/vB. Cheaper than the tools bought one by one. Use to pick the cheapest chain, time a transaction or show fees in a wallet.

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