swap_single.gno

 1package router
 2
 3import (
 4	"errors"
 5	"gno.land/r/gnoswap/common"
 6)
 7
 8// SwapExecutor defines the interface for executing swaps.
 9type SwapExecutor interface {
10	// execute performs the swap operation.
11	execute(p *SingleSwapParams) (int64, int64)
12}
13
14// executeSwap is the common logic for both real and dry swaps.
15func (r *routerV1) executeSwap(executor SwapExecutor, p *SingleSwapParams) (int64, int64) {
16	if p.tokenIn == p.tokenOut {
17		panic(errors.New(errSameTokenSwap))
18	}
19
20	common.MustRegistered(p.tokenIn, p.tokenOut)
21
22	return executor.execute(p)
23}
24
25var (
26	_ SwapExecutor = (*RealSwapExecutor)(nil)
27	_ SwapExecutor = (*DrySwapExecutor)(nil)
28)
29
30// singleSwap executes a swap within a single pool using the provided parameters.
31// It processes a token swap within two assets using a specific fee tier and
32// automatically sets the recipient to the caller's address.
33func (r *routerV1) singleSwap(_ int, rlm realm, p *SingleSwapParams) (int64, int64) {
34	return r.executeSwap(&RealSwapExecutor{rlm: rlm, router: r}, p)
35}
36
37// singleDrySwap simulates a single-token swap operation without executing it.
38// It performs a dry run simulation and does not alter the state. The payer is
39// the address resolved at the entry point (DrySwapRoute) since dry-run paths
40// do not have realm context.
41func (r *routerV1) singleDrySwap(payer address, p *SingleSwapParams) (int64, int64) {
42	return r.executeSwap(&DrySwapExecutor{router: r, payer: payer}, p)
43}