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The payable modifier in Solidity can be used to make smart contract functions able to receive either, or to make Ether transfers to address variables possible.

9 votes
Accepted

Testing Payable Functions From Truffle

Web3 offers a number of optional parameters which you can add to a function call: from - The address transactions should be made from. gasPrice - The gas price in wei to use for transactions. gas - …
Shawn Tabrizi's user avatar
3 votes

How to set msg.value in solidity function call

You need to make doBuy() payable since it is the entry point for the second function, and ultimately it is the function that users call and send the Ether to. … You do not need to make buyTokens() payable, since it is not directly called by the user. …
Shawn Tabrizi's user avatar