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rpcbinding: initial support for iterators, see #2768

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Already better than stackitem.Item.
This commit is contained in:
Roman Khimov 2022-11-09 10:20:44 +03:00
parent 57ec67b375
commit d569fe01e6
3 changed files with 21 additions and 9 deletions
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11
cli/smartcontract/testdata/nameservice/nns.go vendored
View file

@ -2,12 +2,13 @@
package nameservice
import (
"github.com/google/uuid"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/neorpc/result"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/nep11"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"math/big"
)
@ -59,8 +60,8 @@ func New(actor Actor) *Contract {
// Roots invokes `roots` method of contract.
func (c *ContractReader) Roots() (stackitem.Item, error) {
return unwrap.Item(c.invoker.Call(Hash, "roots"))
func (c *ContractReader) Roots() (uuid.UUID, result.Iterator, error) {
return unwrap.SessionIterator(c.invoker.Call(Hash, "roots"))
}
// GetPrice invokes `getPrice` method of contract.
@ -79,8 +80,8 @@ func (c *ContractReader) GetRecord(name string, typev *big.Int) (string, error)
}
// GetAllRecords invokes `getAllRecords` method of contract.
func (c *ContractReader) GetAllRecords(name string) (stackitem.Item, error) {
return unwrap.Item(c.invoker.Call(Hash, "getAllRecords", name))
func (c *ContractReader) GetAllRecords(name string) (uuid.UUID, result.Iterator, error) {
return unwrap.SessionIterator(c.invoker.Call(Hash, "getAllRecords", name))
}
// Resolve invokes `resolve` method of contract.

5
docs/compiler.md
View file

@ -449,7 +449,10 @@ returns false.
If your contract is NEP-11 or NEP-17 that's autodetected and an appropriate
package is included as well. Notice that the type data available in the
manifest is limited, so in some cases the interface generated may use generic
stackitem types. Iterators are not supported yet.
stackitem types. Any InteropInterface returned from a method is treated as
iterator and an appropriate unwrapper is used with UUID and iterator structure
result. This pair can then be used in Invoker `TraverseIterator` method to
retrieve actual resulting items.
```
$ ./bin/neo-go contract generate-rpcwrapper --manifest manifest.json --out rpcwrapper.go --hash 0x1b4357bff5a01bdf2a6581247cf9ed1e24629176

8
pkg/smartcontract/rpcbinding/binding.go
View file

@ -334,9 +334,17 @@ func scTemplateToRPC(cfg binding.Config, ctr ContractTmpl, imports map[string]st
for i := range ctr.SafeMethods {
switch ctr.SafeMethods[i].ReturnType {
case "interface{}":
abim := cfg.Manifest.ABI.GetMethod(ctr.SafeMethods[i].NameABI, len(ctr.SafeMethods[i].Arguments))
if abim.ReturnType == smartcontract.InteropInterfaceType {
imports["github.com/google/uuid"] = struct{}{}
imports["github.com/nspcc-dev/neo-go/pkg/neorpc/result"] = struct{}{}
ctr.SafeMethods[i].ReturnType = "uuid.UUID, result.Iterator"
ctr.SafeMethods[i].CallFlag = "SessionIterator"
} else {
imports["github.com/nspcc-dev/neo-go/pkg/vm/stackitem"] = struct{}{}
ctr.SafeMethods[i].ReturnType = "stackitem.Item"
ctr.SafeMethods[i].CallFlag = "Item"
}
case "bool":
ctr.SafeMethods[i].CallFlag = "Bool"
case "*big.Int":