test: Added check for EOA transfer E2E Test

test/basic-e2e.bats

@@ -11,11 +11,25 @@ setup() {
 }
 
 @test "Send EOA transaction" {
+    local initial_nonce=$(cast nonce "$senderAddr" --rpc-url "$rpc_url") || return 1
     local value="10ether"
 
+    # case 1: Transaction successfull sernder has suffecient balance
     run sendTx "$private_key" "$receiver" "$value"
     assert_success
     assert_output --regexp "Transaction successful \(transaction hash: 0x[a-fA-F0-9]{64}\)"
+
+    # case 2: Transaction rejected sender attempts to transfer more than they have in their wallet
+    # Trx will fail pre validation check on the node and will be dropped subsequently from the pool
+    # without recording it on the chain and hence nonce will not change  
+    local sender_balance=$(cast balance "$senderAddr" --ether --rpc-url "$rpc_url") || return 1    
+    local excessive_value="$(echo "$sender_balance + 1" | bc)ether"
+    run sendTx "$private_key" "$receiver" "$excessive_value"
+    assert_failure 
+
+    # check wheather nonce of sender was updated correctly or not
+    local final_nonce=$(cast nonce "$senderAddr" --rpc-url "$rpc_url") || return 1
+    assert_equal "$final_nonce" "$(echo "$initial_nonce + 1" | bc)"
 }
 
 @test "Deploy ERC20Mock contract" {

test/helpers/common.bash

@@ -94,6 +94,11 @@ function sendTx() {
         return 1
     fi
 
+    # Check initial ether balance of sender and receiver 
+    local sender_initial_balance=$(cast balance "$senderAddr" --ether --rpc-url "$rpc_url") || return 1    
+    local receiver_initial_balance=$(cast balance "$account_addr" --ether --rpc-url "$rpc_url") || return 1
+
+
     # Check if the first remaining argument is a numeric value (Ether to be transferred)
     if [[ "$value_or_function_sig" =~ ^[0-9]+(ether)?$ ]]; then
         # Case: EOA transaction (Ether transfer)
@@ -144,7 +149,16 @@ function sendTx() {
         return 1
     fi
 
-    echo "Transaction successful (transaction hash: $tx_hash)"
+    if [[ "$value_or_function_sig" =~ ^[0-9]+(ether)?$ ]]; then
+        sleep 7
+        checkTransactionSuccess "$senderAddr" "$receiver" "$value_or_function_sig" "$tx_hash" "$sender_initial_balance" "$receiver_initial_balance"
+        if [[ $? -ne 0 ]]; then
+            echo "Error: Balance not updated correctly."
+            return 1
+        fi
+    fi
+
+    echo "Transaction successful (transaction hash: '$tx_hash')"
 
     return 0
 }
@@ -185,3 +199,58 @@ function queryContract() {
 
     return 0
 }
+
+function rpcQuery() {
+    local method="$1"     # The JSON-RPC method name
+    shift                 
+    local params=("$@")   # Remaining arguments are the parameters for the RPC method
+
+    # Check if rpc_url is available
+    if [[ -z "$rpc_url" ]]; then
+        echo "Error: rpc_url environment variable is not set."
+        return 1
+    fi
+
+    # Use cast to perform a generic RPC call
+    local response
+    response=$(cast rpc "$method" "${params[@]}" --rpc-url "$rpc_url" 2>&1)
+
+    # Check if the cast rpc command was successful
+    if [[ $? -ne 0 ]]; then
+        echo "Error: Failed to perform RPC query."
+        echo "$response"
+        return 1
+    fi
+
+    echo "$response"
+    return 0
+}
+
+function checkTransactionSuccess() {
+    local senderAddr="$1"
+    local receiver="$2"
+    local value_or_function_sig="$3"
+    local tx_hash="$4"
+    local sender_initial_balance="$5"
+    local receiver_initial_balance="$6"
+
+    local sender_final_balance=$(cast balance "$senderAddr" --ether --rpc-url "$rpc_url") || return 1
+    local gas_used=$(cast tx "$tx_hash" --rpc-url "$rpc_url" | grep '^gas ' | awk '{print $2}')
+    local gas_price=$(cast tx "$tx_hash" --rpc-url "$rpc_url" | grep '^gasPrice' | awk '{print $2}')
+    local gas_fee=$(echo "$gas_used * $gas_price" | bc)
+    local gas_fee_in_ether=$(cast --from-unit wei --to-unit ether "$gas_fee")
+
+    local sender_balance_change=$(echo "$sender_initial_balance - $sender_final_balance" | bc)
+    echo "Sender balance changed by: '$sender_balance_change' wei"
+    echo "Gas fee paid: '$gas_fee_in_ether' ether"
+
+    local receiver_final_balance=$(cast balance "$receiver" --ether --rpc-url "$rpc_url") || return 1
+    local receiver_balance_change=$(echo "$receiver_final_balance - $receiver_initial_balance" | bc)
+    echo "Receiver balance changed by: `$receiver_balance_change` wei"
+
+    # Trim 'ether' suffix from value_or_function_sig to get the numeric part
+    local value_in_ether=$(echo "$value_or_function_sig" | sed 's/ether$//')
+    assert_equal "$receiver_balance_change" "$value_in_ether" "Error receiver balance updated incorrectly"
+    # Asserts sender's balance change is equal to the value transferred plus the gas fee
+    assert_equal "$sender_balance_change" "$(echo "$value_in_ether + $gas_fee_in_ether" | bc)" "Error sender balance updated incorrectly"
+}