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Static tables for EVM gas costs - opcodes, block limits, transaction costs. 
import { GAS_COSTS, BLOCK_GAS_LIMITS, TRANSACTION_COSTS } from 'voltaire-effect/primitives/GasCosts'

// Opcode costs
GAS_COSTS.ADD          // 3n
GAS_COSTS.MUL          // 5n
GAS_COSTS.SLOAD        // 2100n (post-Berlin)
GAS_COSTS.SSTORE       // 20000n (cold)

// Block limits
BLOCK_GAS_LIMITS.london   // 30000000n
BLOCK_GAS_LIMITS.shanghai // 30000000n

// Transaction costs
TRANSACTION_COSTS.base          // 21000n
TRANSACTION_COSTS.txDataZero    // 4n
TRANSACTION_COSTS.txDataNonZero // 16n

​
Usage

const estimateDataCost = (data: Uint8Array) => {
  let cost = TRANSACTION_COSTS.base
  for (const byte of data) {
    cost += byte === 0 
      ? TRANSACTION_COSTS.txDataZero 
      : TRANSACTION_COSTS.txDataNonZero
  }
  return cost
}