2670FA4B007CAF…978C2C2AF133

Arguments · 7

1. #1currency
2. #2currency.gno
3. #3// Package currency moves launchpad payments in native ugnot or any GRC20 token. // // Every function takes the calling realm's own cur as rlm, so funds always move // to or from that realm and never from a realm the caller can name. package currency import ( "chain" "chain/banker" "chain/runtime/unsafe" "gno.land/p/nt/grc20/v0" "gno.land/p/samcrew/launchpad/meta/v1" ) const NativeDenom = "ugnot" // CollectNative accepts exactly amount ugnot attached by the user who called // the realm directly, and returns that user. Coins attached to a call that // reaches the realm through another realm belong to that other realm and are // refused. func CollectNative(_ int, rlm realm, amount int64) address { if !rlm.IsCurrent() { panic("launchpad/currency: rlm is not the current realm") } prev := rlm.Previous() if !prev.IsUserCall() { panic("launchpad/currency: native payment must be attached to a direct user call") } sent := unsafe.OriginSend() if len(sent) != 1 || sent[0].Denom != NativeDenom || sent[0].Amount != amount { panic("launchpad/currency: attached coins do not match the amount due") } return prev.Address() } // AssertNoCoins refuses coins attached by a user who calls the realm directly: // they would land in the realm, which keeps no account of them. Coins attached // to a call that reaches the realm through another realm went to that other // realm and are its business. The pinned chain also fails a call whose coins // no code reads; this check does not depend on that. func AssertNoCoins(_ int, rlm realm) { if !rlm.IsCurrent() { panic("launchpad/currency: rlm is not the current realm") } if rlm.Previous().IsUserCall() && len(unsafe.OriginSend()) != 0 { panic("launchpad/currency: this call does not accept coins") } } // A token ledger keys balances by the receiver's text, so a receiver in any // spelling but the one the chain gives a caller would be paid into a balance // no caller can reach. func assertReceiver(to address) { if !meta.ValidAddress(to) { panic("launchpad/currency: invalid receiver") } } // PayNative sends amount ugnot from the calling realm. func PayNative(_ int, rlm realm, to address, amount int64) { if !rlm.IsCurrent() { panic("launchpad/currency: rlm is not the current realm") } assertReceiver(to) banker.NewBanker(banker.BankerTypeRealmSend, rlm). SendCoins(rlm.Address(), to, chain.Coins{{NativeDenom, amount}}) } // CollectToken pulls amount of tok from the realm's direct caller, who must have // approved the calling realm, and returns that caller. func CollectToken(_ int, rlm realm, tok *grc20.Token, amount int64) address { if !rlm.IsCurrent() { panic("launchpad/currency: rlm is not the current realm") } AssertNoCoins(0, rlm) payer := rlm.Previous().Address() if err := tok.RealmTeller(0, rlm).TransferFrom(0, rlm, payer, rlm.Address(), amount); err != nil { panic(err.Error()) } return payer } // PayToken sends amount of tok from the calling realm's own balance. func PayToken(_ int, rlm realm, tok *grc20.Token, to address, amount int64) { if !rlm.IsCurrent() { panic("launchpad/currency: rlm is not the current realm") } assertReceiver(to) if err := tok.RealmTeller(0, rlm).Transfer(0, rlm, to, amount); err != nil { panic(err.Error()) } }
4. #4gnomod.toml
5. #5module = "gno.land/p/samcrew/launchpad/currency/v1" gno = "0.9"
6. #6/gno.MemPackageType
7. #7 MPUserAll