Have ECDSAContractAccount use max available gas (#359)

* have eoa pass hardcoded max gas limit

* tweak for tests to pass

* use gasleft instead of hardcoded gas limit

packages/contracts/contracts/optimistic-ethereum/OVM/accounts/OVM_ECDSAContractAccount.sol

@@ -114,7 +114,7 @@ contract OVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
         // Contract creations are signalled by sending a transaction to the zero address.
         if (decodedTx.to == address(0)) {
             (address created, bytes memory revertData) = Lib_SafeExecutionManagerWrapper.safeCREATE(
-                decodedTx.gasLimit,
+                gasleft(),
                 decodedTx.data
             );
 
@@ -131,7 +131,7 @@ contract OVM_ECDSAContractAccount is iOVM_ECDSAContractAccount {
             Lib_SafeExecutionManagerWrapper.safeINCREMENTNONCE();
 
             return Lib_SafeExecutionManagerWrapper.safeCALL(
-                decodedTx.gasLimit,
+                gasleft(),
                 decodedTx.to,
                 decodedTx.data
             );

packages/contracts/test/contracts/OVM/accounts/OVM_ECDSAContractAccount.spec.ts

@@ -106,7 +106,6 @@ describe('OVM_ECDSAContractAccount', () => {
 
       // The ovmCALL is the 2nd call because the first call transfers the fee.
       const ovmCALL: any = Mock__OVM_ExecutionManager.smocked.ovmCALL.calls[1]
-      expect(ovmCALL._gasLimit).to.equal(DEFAULT_EIP155_TX.gasLimit)
       expect(ovmCALL._address).to.equal(DEFAULT_EIP155_TX.to)
       expect(ovmCALL._calldata).to.equal(DEFAULT_EIP155_TX.data)
     })
@@ -130,7 +129,6 @@ describe('OVM_ECDSAContractAccount', () => {
 
       // The ovmCALL is the 2nd call because the first call transfers the fee.
       const ovmCALL: any = Mock__OVM_ExecutionManager.smocked.ovmCALL.calls[1]
-      expect(ovmCALL._gasLimit).to.equal(DEFAULT_EIP155_TX.gasLimit)
       expect(ovmCALL._address).to.equal(DEFAULT_EIP155_TX.to)
       expect(ovmCALL._calldata).to.equal(DEFAULT_EIP155_TX.data)
     })