57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// VulcanizeDB
|
|
// Copyright © 2019 Vulcanize
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package wasm
|
|
|
|
import (
|
|
"github.com/vulcanize/vulcanizedb/pkg/postgres"
|
|
)
|
|
|
|
// Instantiator is used to instantiate WASM functions in Postgres
|
|
type Instantiator struct {
|
|
db *postgres.DB
|
|
instances []WasmFunction // WASM file paths and namespaces
|
|
}
|
|
|
|
type WasmFunction struct {
|
|
BinaryPath string
|
|
Namespace string
|
|
}
|
|
|
|
// NewWASMInstantiator returns a pointer to a new Instantiator
|
|
func NewWASMInstantiator(db *postgres.DB, instances []WasmFunction) *Instantiator {
|
|
return &Instantiator{
|
|
db: db,
|
|
instances: instances,
|
|
}
|
|
}
|
|
|
|
// Instantiate is used to load the WASM functions into Postgres
|
|
func (i *Instantiator) Instantiate() error {
|
|
// TODO: enable instantiation of WASM functions from IPFS
|
|
tx, err := i.db.Beginx()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, pn := range i.instances {
|
|
_, err := tx.Exec(`SELECT wasm_new_instance('$1', '$2')`, pn.BinaryPath, pn.Namespace)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return tx.Commit()
|
|
}
|