Accessing/Modifying Options Parameters in Contract

Question

I'm using truffle and metamask to deploy a very simple contract that enables the transfer of ether from one test account to another.

How do I use my JavaScript file to access the options parameters that were passed in during deployment? Can the constructor parameters passed in during deployment be modified afterwards?

Here's the line in 2_deploy_contracts.js:

deployer.deploy(EscrowPayment, web3.eth.accounts[1], web3.eth.accounts[2], {gas: 4400000, value: web3.toWei(20, 'ether')});

The options parameter would be {gas: 4400000, value: web3.toWei(20, 'ether')}

Here's the constructor in the contract:

function EscrowPayment(address _seller, address _judge) payable {
    buyer = msg.sender;
    seller = _seller;
    judge = _judge;
}

I read this documentation but wasn't able to do something like "myContract.options"

Answer 1

The options that you are passing in the last json object are: gaslimit and value of Ether to send along. These (and other configurable parameters such as the sender or the gasprice) are available via msg and tx objects as described here:

function EscrowPayment(address _seller, address _judge) payable {
    gasLimit = msg.gas; // this is only the *remaining* gas and not the exact value that you passed
    value = msg.value; // in Wei
    gasPrice = tx.gasprice;
    buyer = msg.sender;
    seller = _seller;
    judge = _judge;
}