Fixed denominations

The current pool supports fourteen fixed ETH amounts:

Small	Medium	Large
`0.005`	`0.1`	`2`
`0.01`	`0.2`	`3`
`0.02`	`0.3`	`5`
`0.03`	`0.5`	`10`
`0.05`	`1`

Deposit templates

A deposit chooses one registered template:

parent amount = child 0 + child 1

The parent and each nonzero child must be supported denominations. A standalone template uses one active child and one zero slot. A split template uses two active children. The current policy has 27 canonical templates: 14 standalone templates and 13 split templates.

Parent	One-note template	Two-child template
`0.005 ETH`	`0.005 + 0`	—
`0.01 ETH`	`0.01 + 0`	`0.005 + 0.005`
`0.02 ETH`	`0.02 + 0`	`0.01 + 0.01`
`0.03 ETH`	`0.03 + 0`	`0.02 + 0.01`
`0.05 ETH`	`0.05 + 0`	`0.03 + 0.02`
`0.1 ETH`	`0.1 + 0`	`0.05 + 0.05`
`0.2 ETH`	`0.2 + 0`	`0.1 + 0.1`
`0.3 ETH`	`0.3 + 0`	`0.2 + 0.1`
`0.5 ETH`	`0.5 + 0`	`0.3 + 0.2`
`1 ETH`	`1 + 0`	`0.5 + 0.5`
`2 ETH`	`2 + 0`	`1 + 1`
`3 ETH`	`3 + 0`	`2 + 1`
`5 ETH`	`5 + 0`	`3 + 2`
`10 ETH`	`10 + 0`	`5 + 5`

Any unlisted parent or child amount is rejected. For example, the registered two-child template for 1 ETH is 0.5 + 0.5.

Withdrawal rule

A withdrawal spends one active child at its exact amount and creates no change output. If the bundle has a sibling, that sibling remains available for a later withdrawal. The fee comes out of the selected child’s gross amount. The denomination stays fixed. Fixed values make note selection predictable. Deposit values, withdrawal values, fees, timing, and wallet behavior remain public.

Overview

Private balance

Amounts and exits

Fixed denominations

Deposit templates

Withdrawal rule

​Deposit templates

​Withdrawal rule

Deposit templates

Withdrawal rule