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/markov package

Overview

Package markov ports the canonical Go example "Generating arbitrary text: a Markov chain algorithm" (https://go.dev/doc/codewalk/markov/) to a gno.land realm.

The original reads words from an io.Reader, builds a map from each two-word prefix to the list of words that followed it, then walks that chain picking random suffixes to babble new text. Here the corpus lives on-chain: Feed appends words to a persistent avl.Tree-backed chain, and Generate walks it. The only change needed for on-chain determinism is the source of randomness: instead of math/rand we seed a small LCG with runtime.ChainHeight(), so Generate is a pure, reproducible query that still varies block to block.

Feed is a crossing function (takes `cur realm` first) because it mutates on-chain state; Generate and Render are read-only.

Functions

Feed

func Feed(cur realm, text string) string

Feed appends text to the on-chain corpus, extending the Markov chain. Any caller may enrich the corpus — this is the open-membership demo model.

Param

Command

# WARNING: This command is running in an INSECURE mode.
# It is strongly recommended to use a hardware device for signing
# and avoid trusting any computer connected to the internet,
# as your private keys could be exposed.

gnokey maketx call -pkgpath "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/markov" -func "Feed" -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "topaz-1" -remote "https://rpc.topaz.testnets.gno.land" ADDRESSgnokey query -remote "https://rpc.topaz.testnets.gno.land" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/markov" -func "Feed" -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -broadcast=false ADDRESS > call.tx
gnokey sign -tx-path call.tx -chainid "topaz-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "https://rpc.topaz.testnets.gno.land" call.tx

Generate

func Generate(nWords int) string

Generate babbles up to nWords of Markov text from the current corpus, seeded deterministically by the chain height. Read-only.

Param

Command

gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/markov.Generate()"

Result

Render

func Render(path string) string

Render shows a freshly generated sample plus corpus stats. The path may carry a word count, e.g. Render("/60").

Param

Command

gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/markov.Render()"

Result

Stats

func Stats() (int, int)

Stats returns (totalWords, prefixCount) for the current corpus.

Command

gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/markov.Stats()"

Result