# 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 -->
BalanceOf(owner string, id int) uint64
Mint(cur interface {.seal func(); Address func() .uverse.address; IsCode func() bool; IsCurrent func() bool; IsEphemeral func() bool; IsUser func() bool; IsUserCall func() bool; IsUserRun func() bool; PkgPath func() string; Previous func() .uverse.realm; String func() string; Sub func(string) .uverse.realm; Subpath func() string}, to string, id int, amount uint64)
Render(path string) string
TotalSupply(id int) uint64
TransferSingle(cur interface {.seal func(); Address func() .uverse.address; IsCode func() bool; IsCurrent func() bool; IsEphemeral func() bool; IsUser func() bool; IsUserCall func() bool; IsUserRun func() bool; PkgPath func() string; Previous func() .uverse.realm; String func() string; Sub func(string) .uverse.realm; Subpath func() string}, to string, id int, amount uint64)
Signatures reconstructed verbatim from vm/qfuncs — interface params keep their inline definitions.
vm/qrender output, sanitized (docs/render-security.md) and displayed in an empty-sandbox iframe — scripts, forms and popups cannot run. Links stay inert in-preview; right-click to open.