Getting error TypeError: transactionsContract.addToBlockchain is not a function at sendTransaction (TransactionsContext.jsx:85:62)

[lakshit24]

i am creating a website to transfer etherreum with metamask
but getting the following error
TypeError: transactionsContract.addToBlockchain is not a function at sendTransaction (TransactionsContext.jsx:85:62)
i have defined the addToBlockchain function in on of my smart_contract file which is in Transactions.sol

here is my transactionContext file

import React, { useEffect, useState } from "react";
import { ethers } from "ethers";
import { contractAbi, contractAddress } from "../utils/constants";
export const TransactionsContext = React.createContext();
const { ethereum } = window;



const getEthereumContract = async () => {
    const provider = new ethers.BrowserProvider(window.ethereum);
    const signer = await provider.getSigner();
    const transactionsContract = new ethers.Contract
        (contractAddress, contractAbi, signer);
    return transactionsContract;
}


 export const TransactionProvider = ({ children }) => {

const [currentAccount, setCurrentAccount] = useState("");

const [formData,setFormData]=useState({addressTo:'',amount:'',keyword:'',message:''});

const [isLoading, setIsLoading] = useState(false);

const[transactionCount , setTransactionCount]=useState(localStorage.getItem('transactionCount'));



const handleChange=(e,name)=>{
    setFormData((prevState)=>({ ...prevState,[name]:e.target.value}));
};


const checkIfWalleTisConnected = async () => { 
    try {
        if (!ethereum) return alert("Please install metamask");
        const accounts = await ethereum.request({ method: 'eth_accounts' });
        if (accounts.length) {
            setCurrentAccount(accounts[0]);
            //get transactions
        }
        else {
            console.log("no accounts found");
        }
    } catch (error) {
        console.log(error);
        throw new Error("no ethereum object checkIfWalleTisConnected ");
    }
}



const connectWallet = async () => {
    try {
        if (!ethereum) return alert("Please install metamask");

        const accounts = await ethereum.request({ method: 'eth_requestAccounts' });

        setCurrentAccount(accounts[0]);
    } catch (error) {
        console.log(error);
        throw new Error("no ethereum object connectWallet ");
    }
}

const sendTransaction=async()=>{
    try {
        if (!ethereum) return alert("Please install metamask");
        
        const{addressTo,amount,keyword,message}=formData;
        const transactionsContract=getEthereumContract();
        const parsedAmount=ethers.parseEther(amount);

        await ethereum.request({
            method:'eth_sendTransaction',
            params:[{
                from:currentAccount,
                to:addressTo,
                gas:'0x5208',//hexa for 21000 (0.000021eth)
                value:parsedAmount._hex,
            }]
        });

        const transactionHash=await transactionsContract.addToBlockchain(addressTo,parsedAmount,message,keyword);

        setIsLoading(true);
        console.log(`loading - ${transactionHash.hash}`);
        await transactionHash.wait();

        setIsLoading(false);
        console.log(`succces - ${transactionHash.hash}`);

        const transactionCount = await transactionsContract.getTransactionCount();

        setTransactionCount(transactionCount.toNumber());

    } catch (error) {
        console.log(error);
        throw new Error("no ethereum object sendTransaction");
    }
}



useEffect(() => {
    checkIfWalleTisConnected();
}, []);
return (
    <TransactionsContext.Provider value={{ connectWallet,currentAccount,formData,setFormData,handleChange,sendTransaction}}>
        {children}
    </TransactionsContext.Provider>
);

}
``
also this error is shown can anyone tell me why
TransactionsContext.jsx:100 Uncaught (in promise) Error: no ethereum object sendTransaction at sendTransaction

here is the part of abi file which is used for that addtoblockchain
{ "inputs": [ { "internalType": "address payable", "name": "receiver", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" }, { "internalType": "string", "name": "message", "type": "string" }, { "internalType": "string", "name": "keyword", "type": "string" } ], "name": "addToBlockchain", "outputs": [], "stateMutability": "nonpayable", "type": "function" },