const MAX_PRIORITY_FEE_PER_GAS_FEE_PAYER: u128 = 1_000_000_000;Expand description
Priority fee per gas when the sponsor pays (feePayer: true). Must stay
under the server-enforced MAX_PRIORITY_FEE_PER_GAS_DEFAULT (10 gwei)
defined by the mpp-rs FeePayerPolicy.