It is possible CallFunc().Returns into struct?

[lmittmann]

It is possible CallFunc().Returns into struct?

[lmittmann]

Tuples are in general supported by this package. However, there seems to be a bug that prevents tuple decoding of the call return data (#25).

Once this bug is resolved you will be able to access the slot0 like this:

var (
	client    = w3.MustDial("https://rpc.ankr.com/eth")
	funcSlot0 = w3.MustNewFunc("slot0()", "(uint160 sqrtPriceX96, int24 tick, uint16 observationIndex, uint16 observationCardinality, uint16 observationCardinalityNext, uint8 feeProtocol, bool unlocked) slot0")
	addrPool  = w3.A("0x5777d92f208679DB4b9778590Fa3CAB3aC9e2168")
)

func main() {
	var res slot0
	if err := client.Call(
		eth.CallFunc(funcSlot0, addrPool).Returns(&res),
	); err != nil {
		fmt.Printf("Failed to fetch slot0: %v\n", err)
		return
	}

	fmt.Printf("Slot0: %+v\n", res)
}

type slot0 struct {
	SqrtPriceX96               *big.Int
	Tick                       *big.Int
	ObservationIndex           uint16
	ObservationCardinality     uint16
	ObservationCardinalityNext uint16
	FeeProtocol                uint8
	Unlocked                   bool
}

For requests with a dynamic number of calls see examples/scan_blocks.

[lmittmann]

The new release v0.10.0 fixes the related issue