web3-ethFunctionsprepareTransactionForSigningprepareTransactionForSigning CallableprepareTransactionForSigning(transaction: Transaction, web3Context: Web3Context<EthExecutionAPI, any>, privateKey?: string | Buffer): Promise<TypedTransaction>Parameterstransaction: Transactionweb3Context: Web3Context<EthExecutionAPI, any>optionalprivateKey: string | BufferReturns Promise<TypedTransaction>