4CB32EE2D9AE16…7778BF225E76

Arguments · 9

1. #1microblog
2. #2README.md
3. #3# Microblog Wall > ⚠️ **Experimental — generated with no human supervision.** This realm was > produced automatically by an MCP-driven agent to exercise the gno MCP server > and tooling, and to generate test content for gno compilers, linters and > formatters. **Not audited. Not for production.** Full context & folder README: > [r/moul/x/daily](https://github.com/moul/gno-contracts/blob/main/r/moul/x/daily/README.md) --- A public, append-only microblog for gno.land. Anyone can post a short message (up to 280 bytes); each post records the caller's address and the block height at which it was made. The `Render` view shows the wall newest-first, 20 posts per page, with total count and prev/next pagination driven by the render path. - **Realm path:** `gno.land/r/REPLACE_ADDR/microblog` - **Gno version:** 0.9 (sapphire) ## API - `Post(cur realm, msg string)` — crossing tx. Panics if `msg` is empty or longer than 280 bytes. Stores `{author, msg, height}`. - `Count() int` — total number of posts. - `Render(path string) string` — Markdown wall, newest-first, paginated. ## Example calls Post a message (crossing call via `gnokey`): ```sh gnokey maketx call \ -pkgpath "gno.land/r/REPLACE_ADDR/microblog" \ -func Post \ -args "gm gno.land 👋" \ -gas-fee 1000000ugnot -gas-wanted 2000000 \ -broadcast -chainid sapphire-1 -remote <rpc> mykey ``` View the wall in gnoweb: ``` https://gno.land/r/REPLACE_ADDR/microblog # page 1 (newest 20) https://gno.land/r/REPLACE_ADDR/microblog:?page=2 # older posts https://gno.land/r/REPLACE_ADDR/microblog:/2 # same page, path form ``` From another realm: ```go import "gno.land/r/REPLACE_ADDR/microblog" func Shout(cur realm) { microblog.Post(cross(cur), "posted from another realm") } ``` <!-- BEGIN GNOCONTRACTS FOOTER (generated by `make readmes`; do not edit below) --> --- Part of **[moul/gno-contracts](https://github.com/moul/gno-contracts)** — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage. > 🧪 **Highly experimental — potentially vibe-coded.** Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: [DISCLAIMER](https://github.com/moul/gno-contracts/blob/main/DISCLAIMER.md). <!-- END GNOCONTRACTS FOOTER -->
4. #4gnomod.toml
5. #5module = "gno.land/r/moul/x/daily/microblog/v0" gno = "0.9"
6. #6microblog.gno
7. #7// Package microblog is a public microblog wall for gno.land. // // Anyone can Post a short message (<= maxMsgLen chars). Every post records // the caller address, the message, and the block height at which it was made. // Render displays the wall newest-first, 20 posts per page, with pagination // driven by the Render path (e.g. "?page=2" or "/2"). package microblog import ( "chain" "chain/runtime" "chain/runtime/unsafe" "strconv" "strings" ) // maxMsgLen is the maximum length (in bytes) of a single post. const maxMsgLen = 280 // pageSize is how many posts a single Render page shows. const pageSize = 20 // post is a single microblog entry. type post struct { Author string // bech32 address of the poster Msg string // the message body Height int64 // block height at which it was posted } // posts is the append-only wall, in chronological (oldest-first) order. // Render reverses this view to show newest-first. var posts []post // Post publishes msg to the wall. It is a crossing function: callers invoke it // with Post(cross(cur), "hello"). It panics if msg is empty or longer than // maxMsgLen bytes. func Post(cur realm, msg string) { if !cur.IsCurrent() { panic("spoofed realm: cur is not the live crossing frame") } if len(msg) == 0 { panic("microblog: empty message") } if len(msg) > maxMsgLen { panic("microblog: message too long (max " + strconv.Itoa(maxMsgLen) + " bytes)") } author := unsafe.PreviousRealm().Address() posts = append(posts, post{ Author: author.String(), Msg: msg, Height: runtime.ChainHeight(), }) chain.Emit("Post", "author", author.String(), "len", strconv.Itoa(len(msg))) } // Count returns the total number of posts on the wall. func Count() int { return len(posts) } // Render renders the wall as Markdown, newest-first, pageSize posts per page. // The page is parsed from path: "?page=N", "?p=N", "/N", or a bare "N" all // select page N (1-indexed). Anything else defaults to page 1. func Render(path string) string { total := len(posts) page := parsePage(path) var b strings.Builder b.WriteString("# Microblog Wall\n\n") if total == 0 { b.WriteString("_No posts yet. Be the first to post._\n") return b.String() } pages := (total + pageSize - 1) / pageSize if page < 1 { page = 1 } if page > pages { page = pages } b.WriteString(strconv.Itoa(total)) b.WriteString(" posts total · page ") b.WriteString(strconv.Itoa(page)) b.WriteString(" of ") b.WriteString(strconv.Itoa(pages)) b.WriteString("\n\n") // Newest-first: post index total-1 is newest. For page p (1-indexed), // skip (p-1)*pageSize newest posts, then take up to pageSize. start := total - 1 - (page-1)*pageSize end := start - pageSize + 1 if end < 0 { end = 0 } for i := start; i >= end; i-- { p := posts[i] b.WriteString("- **") b.WriteString(shortAddr(p.Author)) b.WriteString("** · height ") b.WriteString(strconv.FormatInt(p.Height, 10)) b.WriteString("\n\n ") b.WriteString(escapeInline(p.Msg)) b.WriteString("\n") } b.WriteString("\n") b.WriteString(renderNav(page, pages)) return b.String() } // renderNav builds a simple prev/next navigation footer as Markdown links. func renderNav(page, pages int) string { var b strings.Builder if page > 1 { b.WriteString("[← newer](?page=") b.WriteString(strconv.Itoa(page - 1)) b.WriteString(")") } if page > 1 && page < pages { b.WriteString(" · ") } if page < pages { b.WriteString("[older →](?page=") b.WriteString(strconv.Itoa(page + 1)) b.WriteString(")") } if b.Len() == 0 { return "" } return b.String() + "\n" } // parsePage extracts the 1-indexed page number from a Render path. It accepts // "?page=N", "?p=N", "/N", and a bare "N". Unrecognized input yields page 1. func parsePage(path string) int { path = strings.TrimSpace(path) if path == "" { return 1 } // Query form: "?page=2&foo=bar" or "?p=2". if idx := strings.IndexByte(path, '?'); idx >= 0 { query := path[idx+1:] for _, part := range strings.Split(query, "&") { kv := strings.SplitN(part, "=", 2) if len(kv) != 2 { continue } if kv[0] == "page" || kv[0] == "p" { if n, err := strconv.Atoi(strings.TrimSpace(kv[1])); err == nil { return n } } } return 1 } // Path form: "/2" or "2". seg := strings.TrimPrefix(path, "/") if n, err := strconv.Atoi(seg); err == nil { return n } return 1 } // shortAddr abbreviates a bech32 address for display: g1abcd…wxyz. func shortAddr(addr string) string { if len(addr) <= 12 { return addr } return addr[:6] + "…" + addr[len(addr)-4:] } // escapeInline neutralizes characters that would break the Markdown list item // layout (newlines collapse to spaces; leading markers are defused). func escapeInline(s string) string { s = strings.ReplaceAll(s, "\r\n", " ") s = strings.ReplaceAll(s, "\n", " ") s = strings.ReplaceAll(s, "\r", " ") return s }
8. #8/gno.MemPackageType
9. #9 MPUserProd