Automatically merged updates to draft EIP(s) 2733 (#3038)

Hi, I'm a bot! This change was automatically merged because:

 - It only modifies existing Draft or Last Call EIP(s)
 - The PR was approved or written by at least one author of each modified EIP
 - The build is passing

EIPS/eip-2733.md

@@ -126,13 +126,17 @@ fn is_valid(config: &Config, state: &State, tx: TransactionPackage) bool {
     if config.chain_id() != tx.chain_id {
         false
     }
+
+    if tx.children.len() == 0 {
+        false
+    }
     
     if state.nonce(tx.from()) + 1 != tx.nonce {
         false
     }
     
     let cum_limit = tx.children.map(|x| x.gas_limit).sum();
-    if state.balance(tx.from()) < cum_limit * tx.gas_price {
+    if state.balance(tx.from()) < cum_limit * tx.gas_price + intrinsic_gas(tx) {
         false
     }
     
@@ -184,6 +188,16 @@ struct Result {
 }
 ```
 
+### Intrinsic Cost
+Let the intrinsic cost of the transaction package be defined as follows:
+
+```
+fn intrinsic_gas(tx: TransactionPackage) u256 {
+    let data_cost = tx.children.map(|c| data_cost(&c.data)).sum();
+    17000 + 8000 * tx.children.len() + data_cost
+}
+```
+
 ### Execution
 Transaction packages should be executed as follows:
 1. Deduct the cumulative cost from the outer signer's balance.