BUIP087: Utilization of "cash" denomination Proposer: @Ken Shishido Submitted on: 2018-03-18 Status: passed
We propose “cash” as the standard term for 100 (one hundred) satoshi or
1/1,000,000 (one one-millionth) of a bitcoin cash (BCH). Further, we
propose the unofficial ISO code “XCH” to represent a cash unit
(millionth of a BCH unit).
BCH strives for the worldwide adoption, and unit denomination and
calculation must be easy for the average users for daily transactions.
And, it needs to to be differentiated from Bitcoin Core (BTC) to avoid
- Reduce user error on small bitcoin amounts. - Reduce unit bias for
users that want a “whole” bitcoin. - Allow easier comparisons of prices
for most users. - Allow easier bi-directional comparisons to fiat
currencies. - Allows all UTXO amounts to need at most 2 decimal places,
which can be easier to handle. - XCH conforms to the ISO 4217 standard
for transnational currencies, and is supportable in legacy mainstream
All BCH-denominated items are encouraged to also show the denomination
in “cash”, either as the default or as an option. Some wallet
applications which show “bits” will need to be approached about changing
As BCH grows in price versus fiat currencies, it’s important to give
users the ability to quickly and accurately calculate prices for
transactions, savings and other economic activities. The idea of this
BIP is to formalize this name. Additionally, “cash” is likely the only
other denomination that will be needed for BCH as 0.01 cash = 1 satoshi,
meaning that two decimal places will be sufficient to describe any
Existing terms used in BTC such as milli-bitcoin (mBTC) micro-bitcoin
(µBTC) etc are irrelevant to BCH It is recommended that “µBCH” in the
full node wallet be replaced with the option of “cash” or “XCH”.
“cash” denomination has been discussed and proposed by many people
before. Authors of this BUIP take no credit for inventing the term.
(Special thanks to Jimmy Song)
- Ken Shishido - Jonald Fyookball - Andrew Clifford [XCH proposal]