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wasmerRuntime.go
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wasmerRuntime.go
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package keeper
import "C"
import (
"fmt"
"github.com/wasmerio/wasmer-go/wasmer"
)
type WasmerContext struct {
*wasmer.Instance
cfg *runtimeConfig
}
func (wc *WasmerContext) getMemory() []byte {
memoryIns, err := wc.Instance.Exports.GetMemory("memory")
if err != nil {
panic("get memory should not error")
}
memory := memoryIns.Data()
return memory
}
func getInstance(wasmBytes []byte, cfg *runtimeConfig) (*WasmerContext, error) {
wCtx := &WasmerContext{
cfg: cfg,
}
// Create an Engine
engine := wasmer.NewEngine()
// Create a Store
store := wasmer.NewStore(engine)
module, err := wasmer.NewModule(store, wasmBytes)
if err != nil {
fmt.Println("Failed to compile module:", err)
}
importObject := wasmer.NewImportObject()
newFunc := func(f func([]wasmer.Value) ([]wasmer.Value, error), in []*wasmer.ValueType, out []*wasmer.ValueType) *wasmer.Function {
function := wasmer.NewFunction(
store,
wasmer.NewFunctionType(in, out),
f,
)
return function
}
importObject.Register(
"env",
map[string]wasmer.IntoExtern{
"send": newFunc(wCtx.performSend, wasmer.NewValueTypes(wasmer.I32, wasmer.I64), wasmer.NewValueTypes(wasmer.I32)),
"read_db": newFunc(wCtx.readDB, wasmer.NewValueTypes(wasmer.I32, wasmer.I32, wasmer.I32, wasmer.I32, wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"write_db": newFunc(wCtx.writeDB, wasmer.NewValueTypes(wasmer.I32,wasmer.I32,wasmer.I32,wasmer.I32), wasmer.NewValueTypes()),
"delete_db": newFunc(wCtx.deleteDB, wasmer.NewValueTypes(wasmer.I32,wasmer.I32), wasmer.NewValueTypes()),
"new_db_iter": newFunc(wCtx.newDBIter, wasmer.NewValueTypes(wasmer.I32,wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"db_iter_next": newFunc(wCtx.dbIterNext, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"db_iter_key": newFunc(wCtx.dbIterKey, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"db_iter_value": newFunc(wCtx.dbIterValue, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"get_creator": newFunc(wCtx.getCreator, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"get_invoker": newFunc(wCtx.getInvoker, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"self_address": newFunc(wCtx.selfAddress, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"get_pre_caller": newFunc(wCtx.getPreCaller, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"get_block_header": newFunc(wCtx.getBlockHeader, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"get_input_length": newFunc(wCtx.getInputLength, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"get_input": newFunc(wCtx.getInput, wasmer.NewValueTypes(wasmer.I32, wasmer.I32, wasmer.I32), wasmer.NewValueTypes()),
"return_contract": newFunc(wCtx.returnContract, wasmer.NewValueTypes(wasmer.I32,wasmer.I32), wasmer.NewValueTypes()),
"notify_contract": newFunc(wCtx.notifyContract, wasmer.NewValueTypes(wasmer.I32,wasmer.I32), wasmer.NewValueTypes()),
"call_contract": newFunc(wCtx.callContract, wasmer.NewValueTypes(wasmer.I32, wasmer.I32, wasmer.I32), wasmer.NewValueTypes(wasmer.I32)),
"new_contract": newFunc(wCtx.newContract, wasmer.NewValueTypes(wasmer.I32, wasmer.I32, wasmer.I32, wasmer.I32, wasmer.I32), wasmer.NewValueTypes()),
"destroy_contract": newFunc(wCtx.destroyContract, wasmer.NewValueTypes(), wasmer.NewValueTypes()),
"panic_contract": newFunc(wCtx.panicContract, wasmer.NewValueTypes(wasmer.I32,wasmer.I32), wasmer.NewValueTypes()),
"get_validator_power": newFunc(wCtx.getValidatorPower, wasmer.NewValueTypes(wasmer.I32, wasmer.I32, wasmer.I32), wasmer.NewValueTypes()),
"total_power": newFunc(wCtx.totalPower, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"get_balance": newFunc(wCtx.getBalance, wasmer.NewValueTypes(wasmer.I32, wasmer.I32), wasmer.NewValueTypes()),
"addgas": newFunc(wCtx.addGas, wasmer.NewValueTypes(wasmer.I32), wasmer.NewValueTypes()),
"debug_print": newFunc(wCtx.debugPrint, wasmer.NewValueTypes(wasmer.I32, wasmer.I32), wasmer.NewValueTypes()),
},
)
instance, err := wasmer.NewInstance(module, importObject)
if err != nil {
return nil, err
}
wCtx.Instance = instance
return wCtx, nil
}