Fee Delegation Tx Type

Type

Below is a brief introduction to the go-cross type definition that models a Fee Delegated Dynamic Fee transaction in a custom Go-like environment. Instead of relying on external type systems, this definition extends Geth-style transaction structures to support advanced transaction formats such as fee delegation.

This interface, rewritten in TypeScript, represents how both the sender's and fee payer's signatures are embedded into a single unified transaction object. It provides a clear schema for structuring robust fee delegation logic in web3-compatible applications.

Following this overview, the full TypeScript type definition is presented along with explanations for each field. You'll see how the base DynamicFeeTx is extended into a new FeeDelegatedDynamicFeeTx type that separately includes the fee payer’s address and signature components

interface FeeDelegatedDynamicFeeTx {
  to?: string;
  value?: string | number | bigint;
  gasLimit?: number;
  maxFeePerGas: string | number | bigint;
  maxPriorityFeePerGas: string | number | bigint;
  data?: string;
  nonce?: number;
  chainId?: number;
  type: '0x7' | 7;
  // Sender signature
  v: string | number;
  r: string;
  s: string;
  // FeePayer
  feePayer: string;
  // FeePayer signature
  fv: string | number; // feePayer's V
  fr: string; // feePayer's R
  fs: string; // feePayer's S
}