Expect full denoms in Banker.IssueCoin and Banker.RemoveCoin #2107
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Kouteki
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Kouteki
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thehowl
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fix #2107 -------------------------- ## Problem > From [#875 (review)](#875 (review)): > > > That said, soon after this is merged, I think we'll need to change this API again. This current implementation creates an inconsistency within the Banker API. All other banker methods now require you to pass in the full realm path to the token you're referring to, but IssueCoin and RemoveCoin do not. > > Thus, I think a few more changes are in order: > > > > 1. There should be a `RealmDenom(pkgpath, denom string)` function in `std`, which creates a realm denomination (ie. `/gno.land/r/morgan:bitcoin`). There can be a helper method `Realm.Denom(denom string)` (so you can do `std.CurrentRealm().Denom("bitcoin")` > > 2. Instead of modifying `denom`'s value in the native function, we should check it matches what we expect. ie. `strings.HasPrefix(denom, RealmDenom(std.CurrentRealm().PkgPath())`, then check the last part of the denom to see that it matches the Gno regex. (This can all be done in gno, without needing to put it in native code) > > Related with #1475 #1576 ------------------------- ## Solution BREAKING CHANGE: All previous realm calling IssueCoin or RemoveCoin are now expected to append the prefix "/" + realmPkgPath + ":" before the denom, it should be done by using ``std.CurrentRealm().CoinDenom(denom string)`` or by using ``std.CoinDenom(pkgPath, denom string)`` For now to avoid to mix coins and fix security issues like being able to issue coins from other realm, when a realm issue a coin, the pkg path of the realm is added as a prefix to the coin. the thing is some function expect only the base denom ``bitcoin`` (issue & remove) but the others like get require the qualified denom ``gno.land/r/demo/banktest:bitcoin``. it can be confusing I also answer the requirements of the comment @thehowl made: - Two functions are now available ``std.CoinDenom(pkgpath, demon string)`` && the method ``std.Realm.CoinDenom(denom string)`` - the denom's value is changed in the `.gno` file and not the native. Here is an example of how it looks like: ```go func IssueNewCoin(denom string, amount int64) string { std.AssertOriginCall() banker := std.GetBanker(std.BankerTypeRealmIssue) addr := std.PrevRealm().Addr() banker.IssueCoin(addr, std.CurrentRealm().CoinDenom(denom), amount) return std.CurrentRealm().Denom(denom) } func RemoveCoin(denom string, amount int64) { std.AssertOriginCall() banker := std.GetBanker(std.BankerTypeRealmIssue) addr := std.PrevRealm().Addr() banker.RemoveCoin(addr, std.CurrentRealm().CoinDenom(denom), amount) } func GetCoins(denom string) uint64 { banker := std.GetBanker(std.BankerTypeReadonly) addr := std.PrevRealm().Addr() coins := banker.GetCoins(addr) for _, coin := range coins { if coin.Denom == std.CurrentRealm().CoinDenom(denom) { return uint64(coin.Amount) } } return 0 } ``` <details><summary>Contributors' checklist...</summary> - [x] Added new tests, or not needed, or not feasible - [x] Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory - [x] Updated the official documentation or not needed - [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message was included in the description - [x] Added references to related issues and PRs - [x] Provided any useful hints for running manual tests </details> --------- Co-authored-by: Morgan Bazalgette <[email protected]> Co-authored-by: Leon Hudak <[email protected]>
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fix #2107 -------------------------- ## Problem > From [#875 (review)](#875 (review)): > > > That said, soon after this is merged, I think we'll need to change this API again. This current implementation creates an inconsistency within the Banker API. All other banker methods now require you to pass in the full realm path to the token you're referring to, but IssueCoin and RemoveCoin do not. > > Thus, I think a few more changes are in order: > > > > 1. There should be a `RealmDenom(pkgpath, denom string)` function in `std`, which creates a realm denomination (ie. `/gno.land/r/morgan:bitcoin`). There can be a helper method `Realm.Denom(denom string)` (so you can do `std.CurrentRealm().Denom("bitcoin")` > > 2. Instead of modifying `denom`'s value in the native function, we should check it matches what we expect. ie. `strings.HasPrefix(denom, RealmDenom(std.CurrentRealm().PkgPath())`, then check the last part of the denom to see that it matches the Gno regex. (This can all be done in gno, without needing to put it in native code) > > Related with #1475 #1576 ------------------------- ## Solution BREAKING CHANGE: All previous realm calling IssueCoin or RemoveCoin are now expected to append the prefix "/" + realmPkgPath + ":" before the denom, it should be done by using ``std.CurrentRealm().CoinDenom(denom string)`` or by using ``std.CoinDenom(pkgPath, denom string)`` For now to avoid to mix coins and fix security issues like being able to issue coins from other realm, when a realm issue a coin, the pkg path of the realm is added as a prefix to the coin. the thing is some function expect only the base denom ``bitcoin`` (issue & remove) but the others like get require the qualified denom ``gno.land/r/demo/banktest:bitcoin``. it can be confusing I also answer the requirements of the comment @thehowl made: - Two functions are now available ``std.CoinDenom(pkgpath, demon string)`` && the method ``std.Realm.CoinDenom(denom string)`` - the denom's value is changed in the `.gno` file and not the native. Here is an example of how it looks like: ```go func IssueNewCoin(denom string, amount int64) string { std.AssertOriginCall() banker := std.GetBanker(std.BankerTypeRealmIssue) addr := std.PrevRealm().Addr() banker.IssueCoin(addr, std.CurrentRealm().CoinDenom(denom), amount) return std.CurrentRealm().Denom(denom) } func RemoveCoin(denom string, amount int64) { std.AssertOriginCall() banker := std.GetBanker(std.BankerTypeRealmIssue) addr := std.PrevRealm().Addr() banker.RemoveCoin(addr, std.CurrentRealm().CoinDenom(denom), amount) } func GetCoins(denom string) uint64 { banker := std.GetBanker(std.BankerTypeReadonly) addr := std.PrevRealm().Addr() coins := banker.GetCoins(addr) for _, coin := range coins { if coin.Denom == std.CurrentRealm().CoinDenom(denom) { return uint64(coin.Amount) } } return 0 } ``` <details><summary>Contributors' checklist...</summary> - [x] Added new tests, or not needed, or not feasible - [x] Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory - [x] Updated the official documentation or not needed - [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message was included in the description - [x] Added references to related issues and PRs - [x] Provided any useful hints for running manual tests </details> --------- Co-authored-by: Morgan Bazalgette <[email protected]> Co-authored-by: Leon Hudak <[email protected]>
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From #875 (review):
Related with #1475 #1576
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