Interface BlockCustomComponent

import { system } from "@minecraft/server";

// Use world.beforeEvents.worldInitialize.subscribe if you're using @minecraft/server v1
system.beforeEvents.startup.subscribe((initEvent) => {
   initEvent.blockComponentRegistry.registerCustomComponent("custom:block", {
       beforeOnPlayerPlace: (event) => {
           const { player, block, face, permutationToPlace, dimension } = event;
           event.cancel = true; // include this if canceling block placement
           // Your code here
       },
       onEntityFallOn: (event) => {
           const { entity, block, fallDistance, dimension } = event;
           // Your code here
       },
       onPlace: (event) => {
           const { block, dimension, previousBlock } = event;
           // Your code here
       },
       onPlayerBreak: (event) => {
           const { player, block, dimension, brokenBlockPermutation } = event;
           // Your code here
       },
       onPlayerInteract: (event) => {
           const { player, block, dimension, face, faceLocation } = event;
           // Your code here
       },
       onRandomTick: (event) => {
           const { block, dimension } = event;
           // Your code here
       },
       onStepOff: (event) => {
           const { entity, block, dimension } = event;
           // Your code here
       },
       onStepOn: (event) => {
           const { entity, block, dimension } = event;
           // Your code here
       },
       onTick: (event) => {
           const { block, dimension } = event;
           // Your code here
       },
   });
});
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import {
   system,
   BlockComponentPlayerPlaceBeforeEvent,
   BlockComponentEntityFallOnEvent,
   BlockComponentOnPlaceEvent,
   BlockComponentPlayerBreakEvent,
   BlockComponentPlayerInteractEvent,
   BlockComponentRandomTickEvent,
   BlockComponentStepOffEvent,
   BlockComponentStepOnEvent,
   BlockComponentTickEvent,
   CustomComponentParameters,
} from "@minecraft/server";

system.beforeEvents.startup.subscribe((startupEvent) => {
   startupEvent.blockComponentRegistry.registerCustomComponent("custom:block", {
       beforeOnPlayerPlace: (event: BlockComponentPlayerPlaceBeforeEvent, params: CustomComponentParameters) => {
           const { player, block, face, permutationToPlace, dimension } = event;
           event.cancel = true; // include this if canceling block placement
           // Your code here
       },
       onEntityFallOn: (event: BlockComponentEntityFallOnEvent, params: CustomComponentParameters) => {
           const { entity, block, fallDistance, dimension } = event;
           // Your code here
       },
       onPlace: (event: BlockComponentOnPlaceEvent, params: CustomComponentParameters) => {
           const { block, dimension, previousBlock } = event;
           // Your code here
       },
       onPlayerBreak: (event: BlockComponentPlayerBreakEvent, params: CustomComponentParameters) => {
           const { player, block, dimension, brokenBlockPermutation } = event;
           // Your code here
       },
       onPlayerInteract: (event: BlockComponentPlayerInteractEvent, params: CustomComponentParameters) => {
           const { player, block, dimension, face, faceLocation } = event;
           // Your code here
       },
       onRandomTick: (event: BlockComponentRandomTickEvent, params: CustomComponentParameters) => {
           const { block, dimension } = event;
           // Your code here
       },
       onStepOff: (event: BlockComponentStepOffEvent, params: CustomComponentParameters) => {
           const { entity, block, dimension } = event;
           // Your code here
       },
       onStepOn: (event: BlockComponentStepOnEvent, params: CustomComponentParameters) => {
           const { entity, block, dimension } = event;
           // Your code here
       },
       onTick: (event: BlockComponentTickEvent, params: CustomComponentParameters) => {
           const { block, dimension } = event;
           // Your code here
       },
   });
});
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interface BlockCustomComponent {
    beforeOnPlayerPlace?: (
        arg0: BlockComponentPlayerPlaceBeforeEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onBreak?: (
        arg0: BlockComponentBlockBreakEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onEntityFallOn?: (
        arg0: BlockComponentEntityFallOnEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onPlace?: (
        arg0: BlockComponentOnPlaceEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onPlayerBreak?: (
        arg0: BlockComponentPlayerBreakEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onPlayerInteract?: (
        arg0: BlockComponentPlayerInteractEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onRandomTick?: (
        arg0: BlockComponentRandomTickEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onStepOff?: (
        arg0: BlockComponentStepOffEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onStepOn?: (
        arg0: BlockComponentStepOnEvent,
        arg1: CustomComponentParameters,
    ) => void;
    onTick?: (
        arg0: BlockComponentTickEvent,
        arg1: CustomComponentParameters,
    ) => void;
}