vm.js

/*

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Here will be the implementation of VM for KLYNTAR to allow workflows to import it and use in code

*/




import ContractInstance from './rustBase.js'




export let VM = {

    //Function to create a contract instance from WASM bytecode with injected metering function 
    bytesToMeteredContract:async(contractBytecodeAsBuffer,energyLimit,extraModules)=>{

        let contract = new ContractInstance(extraModules,contractBytecodeAsBuffer)

        let contractHandler = await contract.setUpContract(energyLimit) //return instance and pointer to metadata to track energy changes => {contractInstance,contractMetadata}

        return contractHandler
        
    },


    /**
     * 
     *  
     * @param {*} contractInstance - WASM contract instance with injected modules e.g. "metering" and another extra functionality 
     * @param {*} contractMetadata - handler for energy used metering
     * @param {Object} params - object that we should pass to contract
     * @param {*} functionName - function name of contract that we should call
     * @param {'RUST'|'ASC'} type
     * @returns 
     */
    callContract:(contractInstance,contractMetadata,params,functionName,type)=>{

        contractMetadata.energyUsed=0 //make null before call contract

        let result

        if(type==='RUST'){

            result = contractInstance[functionName](params)

        }else if(type==='ASC'){

            let pointerToChunk = contractInstance.__newString(params);

            result = contractInstance.__getString(contractInstance[functionName](pointerToChunk))

        }

        return {result,contractMetadata}

    },

}