ERC20s Based on Legacy EVMs
2 min
Basic Details

Basic Cashbox Details
Configure the following:
- Total Amount: The total funds in the Cashbox. This amount is transferred immediately from the Cold Vault to the new Cashbox upon creating it. Additional amounts CANNOT be added to the Cashbox in the future.
- Initially Allocated Celo Amount (for fees): Amount of Celo initially sent to the Cashbox for fees. This amount is transferred immediately from the Cold Vault to the new Cashbox upon creating it. This can be less then the total amount; funds can be added later. Leftovers from this amount can be collected from the Cold Vault, after the Cashbox is closed, by clicking the “Collect” button.
- Number of parts in Cashbox: For details, see Cashbox Parts. For Legacy ERC20, the number of parts determines the increments of ERC20 that can be sent. The fees, paid in Celo, are calculated separately.
- Fee Lower Limit in Gwei and Fee Upper Limit in Gwei: This will determine the possible transaction gas prices when using the Cashbox. For example, if you choose a range between 10 and 20, you will be able to send transaction gas prices of 10, 11, 13, 15, 17 and 20. Choose a range which is wide enough to allow you to send transactions even if the fees change substantially in the future. (Note that the Max Fee is determined by the MPC Max Fee in the system preferences).
- Fee for Creating the Cashbox in Gwei: This is the fee used to transfer the Total Amount to the Cashbox. The system pushes a notification to the mobile and desktop applications with a recommended fee as soon as you open the Cashbox creation window on the Cold Vault. This notification only works if the Cold Vault is plugged into the proxy via the yellow network cable.
Advanced Details
Check the Advanced box in the upper right to access advanced Cashbox details.

Advanced Cashbox options include all the basic details, plus the following:
- Total Amount: In advanced mode, this is the total amount of funds the Cashbox can send to the destinations over its lifetime. This is not necessarily the amount transferred to the Cashbox upon creation; funds can be added later.
- Initially allocated Amount: The amount to transfer immediately from the Cold Vault to the new Cashbox upon creating it. This can be less then the total amount; funds can be added later. Importantly, while the Cashbox can receive ANY amount of funds over the course of its existence, it can only send up to the total amount configured earlier. Any funds in excess of that total amount are unable to be sent to the destinations.
- Initially Allocated Celo Amount (for fees): Amount of Celo initially sent to the Cashbox for fees. This amount is transferred immediately from the Cold Vault to the new Cashbox upon creating it. This is just the initial amount; funds can be added later. Leftovers from this amount can be collected from the Cold Vault, after the Cashbox is closed, by clicking the “Collect” button.
- Gas limit: The Gas limit to use in any transaction sending from the Cashbox to the outside. Configuring a value above 21,000 is only relevant if you plan to send funds to smart contracts.
Next steps
- To send money from a Cashbox to a preconfigured destination, see Sending Cashbox Transactions (Mobile) and Sending Cashbox Transactions (Desktop).
- To close a Cashbox, see Closing a Cashbox.