Could not interact with contract in BSC mainnet but succeed in testnet (but still a standard transfer) - smartcontracts

Question

I may send raw transaction by sendSignedTransaction to contract address on BSC testnet, and it succeed but this is just a standard transaction; it's not contract call like I want.
But on BSC mainnet, it always failed with error: Warning! Error encountered during contract execution [execution reverted]
Please help me check code below then tell me where issue, any comment, reply or guess welcome; many thanks.
For testnet, it always succeed but it was a a standard transaction, link to image. While I wanna interact with contract, result should show field Interacted With (To)
var minABI = [
{
"constant": true,
"inputs": [
{
"name": "_claimer",
"type": "uint256"
},
{
"name": "_amount",
"type": "uint256"
},
{
"name": "_sig",
"type": "bytes"
}
],
"name": "claim",
"outputs": [],
"payable": true,
"stateMutability": "payable",
"type": "function"
}
];
var web3 = new Web3('https://data-seed-prebsc-1-s1.binance.org:8545'); // testnet
//var web3 = new Web3('https://bsc-dataseed.binance.org:443'); // mainnet
var _from = '0x2151...';
var _to = '0x7f617...';
var _sign = '0x5eddd...';
var PRIVATE_KEY = 'da65f...';
var contract = new web3.eth.Contract(minABI, _to, {from: _from});
var _nonce = await web3.eth.getTransactionCount(_from, 'latest');
var _signEncoded = contract.methods.claim(_nonce, '17390000000000000000', _sign).encodeABI();
var esGas = await web3.eth.estimateGas({
"from" : _from,
"nonce" : _nonce,
"to" : _to,
"data" : _signEncoded
});
var sentValue = gasPrice * esGas;
var transaction = {
'to': _to,
'value': sentValue,
'gas': esGas,
'nonce': _nonce,
'data': _signEncoded,
};
var signedTx = await web3.eth.accounts.signTransaction(transaction, PRIVATE_KEY);
var tx = await web3.eth.sendSignedTransaction(signedTx.rawTransaction);
For mainet, if I used _signEncoded in web3.eth.estimateGas it returns error: execution reverted: Invalid signature, I must use _sign to send transaction but it still always failed with error Warning! Error encountered during contract execution [execution reverted] link to image
var esGas = await web3.eth.estimateGas({
"from" : _from,
"nonce" : _nonce,
"to" : _to,
"data" : _sign
});

Answer 1

Contract deployed on mainnet
But the JS snippet is trying to call the contract on testnet (where it's not deployed).
var web3 = new Web3('https://data-seed-prebsc-1-s1.binance.org:8545'); // testnet
//var web3 = new Web3('https://bsc-dataseed.binance.org:443'); // mainnet
So you need to either deploy it on testnet as well, or use a mainnet (where it's already deployed) web3 provider.
if I want to call this claim, I must call via its contract: contract.methods.claim(_nonce, 'amount', _sign).call() ? sendSignedTransaction is just a normal transfer and could not be used in my case?
The contract.methods.claim(...).call() is an shorthad for calling the function. sendSignedTransaction() can be used to send a transaction - by default without invoking any function, but you can also define its data param to execute the claim() function.
Mind that there's a difference between a call (read-only; performed by the functionName().call() in web3) and a transaction (read-write; performed by the functionName().send() function in web3). Based on the context of your question, I'm guessing you want to send a transaction (executing the claim() function) - not perform a call (to the claim() function).