feat: expose feeCalculator

web3.js/src/fee-calculator.js

@@ -0,0 +1,13 @@
+// @flow
+
+/**
+ * @typedef {Object} FeeCalculator
+ * @property {number} lamportsPerSignature lamports Cost in lamports to validate a signature
+ * @property {number} targetLamportsPerSignature
+ * @property {number} targetSignaturesPerSlot
+ */
+export type FeeCalculator = {
+  lamportsPerSignature: number,
+  targetSignaturesPerSlot: number,
+  targetLamportsPerSignature: number,
+};