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Saving private keys

For development, ok to use .env file

Best to use keystore

# save key to cast
cast wallet import defaultKey --interactive

# get key from cast
cast wallet decrypt-keystore defaultKey

# deploying with forge
forge script script/DeploySimpleStorage.s.sol:DeploySimpleStorage --rpc-url $RPC_URL --account defaultKey --sender $PK_ADDR --broadcast -vvvv

# convert hex to dec 
cast --to-base 0x000000000000000000000000000000000000000000000000000000000000007b d