Integrate C-Chain Support in Avalanche Library

[leirbag95]

Description

This pull request introduces a significant enhancement to the Avalanche library by integrating support for the C-Chain. The changes include the addition of a new enum ChainType, modification of the NewAccount function signature to include ChainType, and the introduction of a new function getEVMAddress specifically for the C-Chain.

Changes Made

1. New Enum Added: ChainType

   • Introduced an enum ChainType with two values: C_CHAIN for the C-Chain and X_CHAIN for the X-Chain. This enum allows users to select the desired chain type easily.

     export enum ChainType {
         C_CHAIN = "C",
         X_CHAIN = "X",
     }

2. Updated Function Signature: NewAccount

   • Modified the NewAccount function to include an optional parameter chain with a default value of ChainType.X_CHAIN. This change enables the creation of accounts specific to the selected chain type.

     export async function NewAccount(
         chain = ChainType.X_CHAIN,
     ): Promise<{ account: AvalancheAccount; privateKey: string }> {
         // Function implementation
     }

3. New Function: getEVMAddress

   • Added a new function getEVMAddress to retrieve the EVM-compatible address for accounts associated with the C-Chain. This function ensures compatibility with Ethereum-style addresses and throws an error if the current signer is not associated with the C-Chain.

     /**
      * Retrieves the EVM compatible address for the current account.
      * This function works specifically with the C-Chain.
      *
      * If the current signer is not associated with the C-Chain,
      * the function throws an error.
      *
      * @returns A Promise that resolves to the EVM-style address of the account
      * @throws An error if the current signer is not associated with the C-Chain
      */
     async getEVMAddress(): Promise<string> {
         // Function implementation
     }

Impact

• The addition of ChainType enum and the updated NewAccount function provide more flexibility and clarity for users interacting with different chains in the Avalanche ecosystem.
• The getEVMAddress function enhances the library's capability to handle C-Chain specific operations, aligning with the growing demand for EVM compatibility.

[MHHukiewitz]

Only nitpicking at this point, LGTM

[MHHukiewitz]

LGTM