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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package stonfi | ||
|
|
||
| import ( | ||
| "context" | ||
| "math/big" | ||
|
|
||
| "github.com/tonkeeper/tongo/abi" | ||
| "github.com/tonkeeper/tongo/boc" | ||
| "github.com/tonkeeper/tongo/contract/jetton" | ||
| "github.com/tonkeeper/tongo/liteapi" | ||
| "github.com/tonkeeper/tongo/tlb" | ||
| "github.com/tonkeeper/tongo/ton" | ||
| ) | ||
|
|
||
| // Stonfi creates a swap message. | ||
| type Stonfi struct { | ||
| cli *liteapi.Client | ||
|
|
||
| router ton.AccountID | ||
| master0, token0 ton.AccountID | ||
| master1, token1 ton.AccountID | ||
| } | ||
|
|
||
| func NewStonfi(ctx context.Context, cli *liteapi.Client, router, master0, master1 ton.AccountID) (*Stonfi, error) { | ||
| j0 := jetton.New(master0, cli) | ||
| token0, err := j0.GetJettonWallet(ctx, router) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| j1 := jetton.New(master1, cli) | ||
| token1, err := j1.GetJettonWallet(ctx, router) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &Stonfi{ | ||
| cli: cli, | ||
| router: router, | ||
| master0: master0, | ||
| token0: token0, | ||
| master1: master1, | ||
| token1: token1, | ||
| }, nil | ||
| } | ||
|
|
||
| func (s *Stonfi) EstimateMinOut(ctx context.Context, amount big.Int) (*big.Int, error) { | ||
| _, value, err := abi.GetPoolAddress(ctx, s.cli, s.router, s.token0.ToMsgAddress(), s.token1.ToMsgAddress()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| result, ok := value.(abi.GetPoolAddress_StonfiResult) | ||
| if !ok { | ||
| return nil, err | ||
| } | ||
| pool, err := ton.AccountIDFromTlb(result.PoolAddress) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| _, output, err := abi.GetExpectedOutputs(context.Background(), s.cli, *pool, tlb.Int257(amount), s.token0.ToMsgAddress()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| result2, ok := output.(abi.GetExpectedOutputs_StonfiResult) | ||
| if !ok { | ||
| return nil, err | ||
| } | ||
| outputValue := big.Int(result2.Out) | ||
| return &outputValue, nil | ||
| } | ||
|
|
||
| func (s *Stonfi) MakeSwapMessage(attachedTON tlb.Grams, forwardTONAmount tlb.Grams, jettonAmount big.Int, minOut big.Int, address ton.AccountID) (*jetton.TransferMessage, error) { | ||
| payload := abi.StonfiSwapJettonPayload{ | ||
| TokenWallet: s.token1.ToMsgAddress(), | ||
| MinOut: tlb.VarUInteger16(minOut), | ||
| ToAddress: address.ToMsgAddress(), | ||
| } | ||
| c := boc.NewCell() | ||
| if err := c.WriteUint(0x25938561, 32); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tlb.Marshal(c, payload); err != nil { | ||
| return nil, err | ||
| } | ||
| jettonTransfer := jetton.TransferMessage{ | ||
| Sender: address, | ||
| Jetton: jetton.New(s.master0, s.cli), | ||
| JettonAmount: &jettonAmount, | ||
| Destination: s.router, | ||
| AttachedTon: attachedTON, | ||
| ForwardTonAmount: forwardTONAmount, | ||
| ForwardPayload: c, | ||
| } | ||
| return &jettonTransfer, nil | ||
| } |