imp: refine ICS20 and IAppCallback
interfaces and improve the wiring
#80
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Description
In this PR, the
IRecvPacket
interface under ICS-20 has been removed. Now, packet processing will only occur when a packet is passed to the ICS-20 contract via application callbacks (methods under theIAppCallback
).Additionally, the methods under
ISendTransfer
have been merged, and we will now expose a singlesend_transfer
entry point. (cc @soareschen) This change aims for improved contract security by reducing unnecessary exposure.