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I'm testing my contract on Ropsten network. For this i've launched geth in docker:

> command: --verbosity 4 -rpc --ipcdisable --rpcaddr "0.0.0.0" --rpccorsdomain "*"  --syncmode "fast"  --rpcapi="db,personal,eth,net,web3,admin" --cache=${CACHE_SIZE:-512} --testnet

I'm able to connect to it with:

get attach http://127.0.0.1:8545

When trying to test my contract in Remix i've changed environment:

enter image description here

How can i set gas price to debug my smart contract calls? Should i change my geth run arguments? Should i unlock my coinbase account before smart contract method calls?

BTW i've found that it working incorrectly. I loaded previously deployed in ropsten smart contract and i expect some specific result for method call (just reading current value). I have expected result with Metamask switched to Ropsten instead of geth. With geth i always get default value (0).

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