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fix(grc20): remove unused interface, fix typo #2793

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Sep 13, 2024
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fix(grc20): remove unused interface, fix typo #2793

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45 changes: 1 addition & 44 deletions examples/gno.land/p/demo/grc/grc20/token.gno
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Original file line number Diff line number Diff line change
Expand Up @@ -2,14 +2,12 @@ package grc20

import (
"std"

"gno.land/p/demo/grc/exts"
)

// token implements the Token interface.
//
// It is generated with Banker.Token().
// It can safely be explosed publicly.
// It can safely be exposed publicly.
type token struct {
banker *Banker
}
Expand Down Expand Up @@ -45,44 +43,3 @@ func (t *token) TransferFrom(from, to std.Address, amount uint64) error {
}
return t.banker.Transfer(from, to, amount)
}

type Token2 interface {
exts.TokenMetadata

// Returns the amount of tokens in existence.
TotalSupply() uint64

// Returns the amount of tokens owned by `account`.
BalanceOf(account std.Address) uint64

// Moves `amount` tokens from the caller's account to `to`.
//
// Returns an error if the operation failed.
Transfer(to std.Address, amount uint64) error

// Returns the remaining number of tokens that `spender` will be
// allowed to spend on behalf of `owner` through {transferFrom}. This is
// zero by default.
//
// This value changes when {approve} or {transferFrom} are called.
Allowance(owner, spender std.Address) uint64

// Sets `amount` as the allowance of `spender` over the caller's tokens.
//
// Returns an error if the operation failed.
//
// IMPORTANT: Beware that changing an allowance with this method brings the risk
// that someone may use both the old and the new allowance by unfortunate
// transaction ordering. One possible solution to mitigate this race
// condition is to first reduce the spender's allowance to 0 and set the
// desired value afterwards:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
Approve(spender std.Address, amount uint64) error

// Moves `amount` tokens from `from` to `to` using the
// allowance mechanism. `amount` is then deducted from the caller's
// allowance.
//
// Returns an error if the operation failed.
TransferFrom(from, to std.Address, amount uint64) error
}
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