Deploying my contract on rinkeby cost ~12 USD in gas fees (using
truffle cli). Is it possible for me to specify gas fees/set a limit in the smart contract so it costs me 0.5 USD, but takes longer to deploy ?
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Deploying my contract on rinkeby cost ~12 USD in gas fees
Your gas fees are a function of
b) can be altered, but with a lower price usually equating to a slower transaction. If it's much lower than the rest of the current market, then it's unlikely the transaction would be mined into a block.
a) cannot be altered unless you change the contract to make its code more compact or more efficient to execute.
Is it possible for me to specify gas fees/set a limit in the smart contract
The contract doesn't know anything about fees. All you can do is set a low gas price when deploying and hope the transaction is picked up by a miner.