escrow.gno

 1package ucs03_zkgm
 2
 3import (
 4	"chain"
 5	"chain/banker"
 6
 7	u256 "gno.land/p/onbloc/math/uint256"
 8	zkgm "gno.land/r/onbloc/ibc/union/apps/ucs03_zkgm"
 9)
10
11// sendNative releases `amount` of denom from the proxy escrow account to
12// receiver. Escrowed native funds sit at the proxy realm address; under the
13// interrealm borrow rule this banker send executes in the proxy's ownership
14// context even though it is invoked from the impl call frame, so the funds leave
15// the proxy escrow rather than the impl realm.
16func (v *ucs03ZkgmV1) sendNative(_ int, rlm realm, denom string, receiver address, amount *u256.Uint) error {
17	n, err := amountInt64(amount)
18	if err != nil {
19		return err
20	}
21	// rlm.Address() is the proxy escrow account: under the interrealm borrow rule
22	// the impl operates in the proxy's ownership context, so the realm-send banker
23	// draws from the proxy balance where the user's -send funds landed.
24	b := banker.NewBanker(banker.BankerTypeRealmSend, rlm)
25	b.SendCoins(rlm.Address(), receiver, chain.NewCoins(chain.NewCoin(denom, n)))
26	zkgm.EmitNativeReleased(0, rlm, denom, receiver, n)
27
28	return nil
29}