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/erc721 package

Overview

Package erc721 is an idiomatic gno.land port of the Solidity ERC-721 non-fungible token standard. Each token has a unique integer id owned by exactly one address; ids are minted sequentially. Ownership, per-owner balances and single-token approvals are kept in ordered avl trees so that Render can iterate deterministically.

Functions

Approve

func Approve(cur realm, spender address, id int64)

Approve grants `spender` the right to transfer token `id`. Only the current owner may approve.

Params

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/erc721" -func "Approve" -args $'' -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/erc721" -func "Approve" -args $'' -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

BalanceOf

func BalanceOf(owner address) uint64

BalanceOf is the exported read-only accessor for balanceOf.

Param

Command

gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/erc721.BalanceOf()"

Result

Mint

func Mint(cur realm, to address) int64

Mint creates the next token id and assigns it to `to`. Only sequential minting is supported (id is returned via the Mint event).

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/erc721" -func "Mint" -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/erc721" -func "Mint" -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

Render

func Render(path string) string

Render displays collection metadata and a token -> owner table.

Param

Command

gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/erc721.Render()"

Result

TotalSupply

func TotalSupply() int64

TotalSupply is the exported read-only accessor for totalSupply.

Command

gnokey query vm/qeval -remote "https://rpc.topaz.testnets.gno.land" -data "gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/erc721.TotalSupply()"

Result

Transfer

func Transfer(cur realm, to address, id int64)

Transfer moves token `id` from the caller to `to`. The caller must own the token (approvals are cleared on transfer).

Params

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/erc721" -func "Transfer" -args $'' -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/erc721" -func "Transfer" -args $'' -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