Setting gasPrice/gasLimit on contract

[fomotrader]

Is it possible to set the default price of gas on a smart contract object?

When approving transactions, sometimes the value is too low on a custom wallet I'm building. And I know I can not supply a new gasPrice when calling approve on the contract object. Any chance I can supply a default gasPrice to the contract object itself?

[zemse]

You can try extending the class that you are passing in the signer/3rd argument to the Contract. Just override the sendTransaction method

class WalletExtended extends Wallet {
  sendTransaction(transaction: Deferrable<TransactionRequest>): Promise<TransactionResponse> {
    if(transaction.gasPrice === undefined) transaction.gasPrice = ethers.utils.parseUnits('1', 'gwei'); // default gasPrice
    if(transaction.gasLimit === undefined) transaction.gasLimit = 1000000; // default gasPrice
    return super.sendTransaction(transaction).then((tx) => {
      return this.provider.waitForTransaction(tx.hash).then((receipt) => {
        return tx
      })
    })
  }
}

[fomotrader]

will try that and report back, thanks!

[ricmoo]

You can use @zemse’s solution inheriting Wallet, but just override getGasPrice.