calculate expected balance change, test passing

e2e_test/test_base_fee_recipient.sh

@@ -8,12 +8,10 @@ source shared.sh
 # Send token and check balance
 balance_before=$(cast balance $FEE_HANDLER)
 tx_json=$(cast send --json --private-key $ACC_PRIVKEY $TOKEN_ADDR 'transfer(address to, uint256 value) returns (bool)' 0x000000000000000000000000000000000000dEaD 100)
-echo "tx json: $tx_json"
-tx_hash=$(echo $tx_json | jq -r '.transactionHash')
-echo "tx hash: $tx_hash"
-cast tx $tx_hash
-cast receipt $tx_hash
+gas_used=$(echo $tx_json | jq -r '.gasUsed')
+block_number=$(echo $tx_json | jq -r '.blockNumber')
+base_fee=$(cast base-fee $block_number)
+expected_balance_change=$((base_fee * gas_used))
 balance_after=$(cast balance $FEE_HANDLER)
 echo "Balance change: $balance_before -> $balance_after"
-# TODO(Alec) calculate expected balance change
-[[ $((balance_before + 100)) -eq $balance_after ]] || (echo "Balance did not change as expected"; exit 1)
+[[ $((balance_before + expected_balance_change)) -eq $balance_after ]] || (echo "Balance did not change as expected"; exit 1)