This little fun function helps you to create valid BIP-39 menemonic phrases that contains only a few words repeated. It might be useful if easy to remember wallet is needed and security is not a concern.
- Clone this repo into your file system
- In DigitOcean web console create a function namespace
lambda - Make sure you have
doctlinstalled and configured - Deploy: Run command to deploy the function
make deploy
- Run:
make run WORD=alien_alert | jq -r '.body.mnemonic' # echo: alien alert alien alert alien alert alien alert alien alert alien alley
- Test: If you have Go installed you can run tests with command
make test
| words length | entropy bits | checksum bits | entropy bits of last word | possible checksums |
|---|---|---|---|---|
| 12 | 128 | 4 | 7 | 128 |
| 15 | 160 | 5 | 6 | 64 |
| 18 | 192 | 6 | 5 | 32 |
| 21 | 224 | 7 | 4 | 16 |
| 24 | 256 | 8 | 3 | 8 |
In general each word encodes 11-bits of information, where the last word contains 4-8 bits of checksum. When you choose 3-words phrase, you actually have 33-bits of entropy, no more.
In the samples folder you can find single word phrases with a corresponding checksum word.
E.g. abandon about line from single-12 file means 12-words phrase: 11x abandon + about.
To easy generate full phrase from the sample, use the following bash command:
make single WORD=abandon LEN=12You can test its correctness on Ian Coleman's BIP-39 tool.
If you played with the following command multiple times, you might spotted a lucky words that are checksum for itself.
Lucky words from single-12 file
action agent aim all ankle announce audit awesome \ beef believe blue border brand breeze bus business \ cannon canyon carry cave century cereal chronic coast convince cute \ dawn dilemma divorce dry \ elevator else embrace enroll escape evolve exclude excuse exercise expire \ fetch fever forward fury \ garment gauge gym \ half harsh hole hybrid \ illegal include index into invest involve \ jeans \ kick kite \ later layer legend life lyrics \ margin melody mom more morning \ nation neck neglect never noble novel \ obvious ocean oil orphan oxygen \ pause peasant permit piano proof pumpkin \ question \ real report rough rude \ salad scale screen sea seat sell seminar seven sheriff siege silver soldier spell split spray stadium sugar sunny sure \ tobacco tongue track tree trouble twelve twice type \ uniform useless \ valid very vibrant virtual vocal \ warrior word world \ yellow
Lucky words from single-18 file
ahead desert dove dumb egg episode express fiction glad glass gorilla \ kiss leader misery mobile mother quiz rally response school sense spend stock \ upper usage wonder
Lucky words from single-24 file
bacon flag gas great slice solution summer they trade trap zebra
Knowing a little bash magic can be very helpful to generate such 👆 lists
egrep "(\b[a-zA-Z]+) \1\b" samples/single12.txt | cut -f1 -d' ' | xargsThis project would not be possible without the following work of others.
- Bitcoin's BIP-39 - the original BIP-39 specification
- tyler-smith/go-bip39 - the golang implementation of BIP-39 by @tyler-smith
- Serverless - DigitalOcean awesome services especially serverless functions
This is OSS project sample of my vast collection of little robots which makes my life easier. Many of them I host for free in the cloud (kudos to Digital Ocean).