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1. #1erc1155
2. #2README.md
3. #3# erc1155 > ⚠️ **Experimental — generated with no human supervision** by the daily MCP pipeline (Solidity→Gno port). Not audited. See [r/moul/x/daily](https://github.com/moul/gno-contracts/blob/main/r/moul/x/daily/README.md). --- An idiomatic gno.land port of the Solidity **ERC-1155** multi-token standard. One realm manages many distinct token ids, each with independent fungible balances tracked in an `avl.Tree` keyed by `(owner, id)`, plus a per-id total supply. It keeps the core ERC-1155 ideas — minting, single transfers, balance and supply queries, and events — while dropping the Solidity-specific machinery (operator approvals, safe-transfer callbacks) that has no analog on gno.land. ## Transactions - `Mint(cur realm, to address, id int, amount uint64)` — mint `amount` of token `id` to `to`; increases that id's total supply. - `TransferSingle(cur realm, to address, id int, amount uint64)` — move `amount` of token `id` from the caller to `to`. ## Read-only - `BalanceOf(owner address, id int) uint64` — balance of one owner for one id. - `TotalSupply(id int) uint64` — total minted for a given id. - `Render(path string)` — Markdown balances table (owner · id · amount) and a per-id supply table. ## Example ``` Mint(cur, g1owner..., 1, 100) // 100 units of token #1 to g1owner Mint(cur, g1owner..., 2, 5) // 5 units of token #2 TransferSingle(cur, g1other..., 1, 40) // caller sends 40 of token #1 BalanceOf(g1owner..., 1) // -> 60 TotalSupply(1) // -> 100 ``` <!-- 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. **Dependency graph:**  > 🧪 **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. #4erc1155.gno
5. #5// Package erc1155 is an idiomatic gno.land port of the Solidity ERC-1155 // multi-token standard. A single realm tracks many distinct token ids, each // with its own fungible balances. Balances are keyed by (owner, id) in an // avl.Tree so Render can iterate deterministically. package erc1155 import ( "strconv" "strings" "chain" "chain/runtime/unsafe" "gno.land/p/nt/avl/v0" ) // balances maps "<owner>:<id>" -> uint64 amount. var balances avl.Tree // supply maps "<id>" -> uint64 total minted for that id. var supply avl.Tree func balKey(owner address, id int) string { return owner.String() + ":" + strconv.Itoa(id) } func supKey(id int) string { return strconv.Itoa(id) } func getBalance(owner address, id int) uint64 { k := balKey(owner, id) if !balances.Has(k) { return 0 } return balances.Get(k).(uint64) } func setBalance(owner address, id int, amount uint64) { k := balKey(owner, id) if amount == 0 { balances.Remove(k) return } balances.Set(k, amount) } func getSupply(id int) uint64 { k := supKey(id) if !supply.Has(k) { return 0 } return supply.Get(k).(uint64) } // Mint creates `amount` units of token `id` and credits them to `to`. func Mint(cur realm, to address, id int, amount uint64) { if !to.IsValid() { panic("erc1155: mint to invalid address") } if amount == 0 { panic("erc1155: mint amount must be > 0") } setBalance(to, id, getBalance(to, id)+amount) supply.Set(supKey(id), getSupply(id)+amount) operator := unsafe.PreviousRealm().Address() chain.Emit("Mint", "operator", operator.String(), "to", to.String(), "id", strconv.Itoa(id), "amount", strconv.FormatUint(amount, 10), ) } // TransferSingle moves `amount` of token `id` from the caller to `to`. func TransferSingle(cur realm, to address, id int, amount uint64) { if !to.IsValid() { panic("erc1155: transfer to invalid address") } if amount == 0 { panic("erc1155: transfer amount must be > 0") } from := unsafe.PreviousRealm().Address() fromBal := getBalance(from, id) if fromBal < amount { panic("erc1155: insufficient balance") } setBalance(from, id, fromBal-amount) setBalance(to, id, getBalance(to, id)+amount) chain.Emit("TransferSingle", "from", from.String(), "to", to.String(), "id", strconv.Itoa(id), "amount", strconv.FormatUint(amount, 10), ) } // BalanceOf returns the amount of token `id` held by `owner`. func BalanceOf(owner address, id int) uint64 { return getBalance(owner, id) } // TotalSupply returns the total amount minted of token `id`. func TotalSupply(id int) uint64 { return getSupply(id) } // Render prints a balances table and a per-id supply table. func Render(path string) string { var b strings.Builder b.WriteString("# ERC-1155 Multi-Token\n\n") b.WriteString("A single realm holding many fungible token ids. ") b.WriteString("Balances are keyed by `(owner, id)`.\n\n") b.WriteString("## Balances\n\n") if balances.Size() == 0 { b.WriteString("_No balances yet. Call `Mint` to create tokens._\n\n") } else { b.WriteString("| Owner | ID | Amount |\n") b.WriteString("|---|---|---|\n") balances.Iterate("", "", func(key string, value interface{}) bool { owner, id := splitBalKey(key) b.WriteString("| `" + owner + "` | " + id + " | " + strconv.FormatUint(value.(uint64), 10) + " |\n") return false }) b.WriteString("\n") } b.WriteString("## Supply per ID\n\n") if supply.Size() == 0 { b.WriteString("_No tokens minted._\n") } else { b.WriteString("| ID | Total Supply |\n") b.WriteString("|---|---|\n") supply.Iterate("", "", func(key string, value interface{}) bool { b.WriteString("| " + key + " | " + strconv.FormatUint(value.(uint64), 10) + " |\n") return false }) } return b.String() } // splitBalKey splits a "<owner>:<id>" balance key. The owner (a bech32 // address) contains no ':', so the id is the substring after the last ':'. func splitBalKey(key string) (owner, id string) { i := strings.LastIndex(key, ":") if i < 0 { return key, "" } return key[:i], key[i+1:] }
6. #6gnomod.toml
7. #7module = "gno.land/r/moul/x/daily/erc1155/v0" gno = "0.9"
8. #8/gno.MemPackageType
9. #9 MPUserProd