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erc20/v0 package

Overview

Package erc20 implements MiniToken, a minimal fungible token modeled on the Solidity ERC-20 idea, ported to gno.land (gno 0.9 / sapphire).

State is package-level and persistent. All state-mutating exported functions are crossing functions (they take `cur realm` as the first parameter) per the gno 0.9 interrealm convention, and identify the caller via cur.Previous().Address() after checking cur.IsCurrent().

Functions

Allowance

func Allowance(owner, spender address) uint64

Allowance returns how much `spender` may still pull from `owner`.

Params

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/moul/x/daily/erc20/v0.Allowance(,)"

Result

Approve

func Approve(cur realm, spender address, amount uint64)

Approve authorizes `spender` to pull up to `amount` tokens from the caller. Crossing function.

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/moul/x/daily/erc20/v0" -func "Approve" -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "gnoland-1" -remote "http://127.0.0.1:26657" ADDRESSgnokey query -remote "http://127.0.0.1:26657" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/moul/x/daily/erc20/v0" -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 "gnoland-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "http://127.0.0.1:26657" call.tx

BalanceOf

func BalanceOf(holder address) uint64

BalanceOf returns the token balance of `holder`. Read-only, non-crossing.

Param

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/moul/x/daily/erc20/v0.BalanceOf()"

Result

Mint

func Mint(cur realm, to address, amount uint64)

Mint creates `amount` new tokens and credits them to `to`, increasing the total supply. Crossing function.

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/moul/x/daily/erc20/v0" -func "Mint" -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "gnoland-1" -remote "http://127.0.0.1:26657" ADDRESSgnokey query -remote "http://127.0.0.1:26657" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/moul/x/daily/erc20/v0" -func "Mint" -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -broadcast=false ADDRESS > call.tx
gnokey sign -tx-path call.tx -chainid "gnoland-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "http://127.0.0.1:26657" call.tx

Name

func Name() string

Name returns the token name.

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/moul/x/daily/erc20/v0.Name()"

Result

Render

func Render(path string) string

Render produces the gnoweb Markdown view of the token: metadata plus a deterministically-ordered table of non-zero balances. Render is NOT a crossing function (no `cur realm` parameter).

Param

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/moul/x/daily/erc20/v0.Render()"

Result

Symbol

func Symbol() string

Symbol returns the token symbol.

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/moul/x/daily/erc20/v0.Symbol()"

Result

TotalSupply

func TotalSupply() uint64

TotalSupply returns the total number of tokens in existence.

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/moul/x/daily/erc20/v0.TotalSupply()"

Result

Transfer

func Transfer(cur realm, to address, amount uint64)

Transfer moves `amount` tokens from the caller to `to`. Crossing function.

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/moul/x/daily/erc20/v0" -func "Transfer" -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "gnoland-1" -remote "http://127.0.0.1:26657" ADDRESSgnokey query -remote "http://127.0.0.1:26657" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/moul/x/daily/erc20/v0" -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 "gnoland-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "http://127.0.0.1:26657" call.tx

TransferFrom

func TransferFrom(cur realm, from, to address, amount uint64)

TransferFrom moves `amount` tokens from `from` to `to`, spending the caller's allowance granted by `from`. Crossing function.

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/moul/x/daily/erc20/v0" -func "TransferFrom" -args $'' -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -chainid "gnoland-1" -remote "http://127.0.0.1:26657" ADDRESSgnokey query -remote "http://127.0.0.1:26657" auth/accounts/ADDRESS
gnokey maketx call -pkgpath "gno.land/r/moul/x/daily/erc20/v0" -func "TransferFrom" -args $'' -args $'' -args $'' -gas-fee 1000000ugnot -gas-wanted 1_000_000_000 -send "" -broadcast=false ADDRESS > call.tx
gnokey sign -tx-path call.tx -chainid "gnoland-1" -account-number ACCOUNTNUMBER -account-sequence SEQUENCENUMBER ADDRESS
gnokey broadcast -remote "http://127.0.0.1:26657" call.tx