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Merge pull request #11641 from smartcontractkit/rtinianov_cleaner_reader
Simplify chain reader's bindings.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| package evm | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/ethereum/go-ethereum" | ||
| "github.com/ethereum/go-ethereum/common" | ||
|
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| commontypes "github.com/smartcontractkit/chainlink-common/pkg/types" | ||
|
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| evmclient "github.com/smartcontractkit/chainlink/v2/core/chains/evm/client" | ||
| "github.com/smartcontractkit/chainlink/v2/core/chains/evm/logpoller" | ||
| evmtypes "github.com/smartcontractkit/chainlink/v2/core/chains/evm/types" | ||
| ) | ||
|
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| type readBinding interface { | ||
| GetLatestValue(ctx context.Context, params any) ([]byte, error) | ||
| Bind(binding commontypes.BoundContract) error | ||
| SetCodec(codec commontypes.Codec) | ||
| Register() error | ||
| Unregister() error | ||
| } | ||
|
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| type methodBinding struct { | ||
| address common.Address | ||
| contractName string | ||
| method string | ||
| client evmclient.Client | ||
| codec commontypes.Codec | ||
| bound bool | ||
| } | ||
|
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| var _ readBinding = &methodBinding{} | ||
|
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| func (m *methodBinding) SetCodec(codec commontypes.Codec) { | ||
| m.codec = codec | ||
| } | ||
|
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| func (m *methodBinding) Register() error { | ||
| return nil | ||
| } | ||
|
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| func (m *methodBinding) Unregister() error { | ||
| return nil | ||
| } | ||
|
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| func (m *methodBinding) GetLatestValue(ctx context.Context, params any) ([]byte, error) { | ||
| if !m.bound { | ||
| return nil, fmt.Errorf("%w: method not bound", commontypes.ErrInvalidType) | ||
| } | ||
|
|
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| data, err := m.codec.Encode(ctx, params, wrapItemType(m.contractName, m.method, true)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| callMsg := ethereum.CallMsg{ | ||
| To: &m.address, | ||
| From: m.address, | ||
| Data: data, | ||
| } | ||
|
|
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| return m.client.CallContract(ctx, callMsg, nil) | ||
| } | ||
|
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| func (m *methodBinding) Bind(binding commontypes.BoundContract) error { | ||
| m.address = common.HexToAddress(binding.Address) | ||
| m.bound = true | ||
| return nil | ||
| } | ||
|
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||
| type eventBinding struct { | ||
| address common.Address | ||
| contractName string | ||
| eventName string | ||
| lp logpoller.LogPoller | ||
| hash common.Hash | ||
| codec commontypes.Codec | ||
| pending bool | ||
| subscribed bool | ||
| bound bool | ||
| } | ||
|
|
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| func (e *eventBinding) SetCodec(codec commontypes.Codec) { | ||
| e.codec = codec | ||
| } | ||
|
|
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| func (e *eventBinding) Register() error { | ||
| e.subscribed = true | ||
| if !e.bound { | ||
| return nil | ||
| } | ||
|
|
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| if err := e.lp.RegisterFilter(logpoller.Filter{ | ||
| Name: wrapItemType(e.contractName, e.eventName, false), | ||
| EventSigs: evmtypes.HashArray{e.hash}, | ||
| Addresses: evmtypes.AddressArray{e.address}, | ||
| }); err != nil { | ||
| return fmt.Errorf("%w: %w", commontypes.ErrInternal, err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (e *eventBinding) Unregister() error { | ||
| e.subscribed = false | ||
| if !e.bound { | ||
| return nil | ||
| } | ||
|
|
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| if err := e.lp.UnregisterFilter(wrapItemType(e.contractName, e.eventName, false)); err != nil { | ||
| return fmt.Errorf("%w: %w", commontypes.ErrInternal, err) | ||
| } | ||
| return nil | ||
| } | ||
|
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| var _ readBinding = &eventBinding{} | ||
|
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| func (e *eventBinding) GetLatestValue(_ context.Context, _ any) ([]byte, error) { | ||
| if !e.bound { | ||
| return nil, fmt.Errorf("%w: event not bound", commontypes.ErrInvalidType) | ||
| } | ||
|
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| confs := logpoller.Finalized | ||
| if e.pending { | ||
| confs = logpoller.Unconfirmed | ||
| } | ||
| log, err := e.lp.LatestLogByEventSigWithConfs(e.hash, e.address, confs) | ||
| if err != nil { | ||
| errStr := err.Error() | ||
| if strings.Contains(errStr, "not found") || strings.Contains(errStr, "no rows") { | ||
| return nil, nil | ||
| } | ||
| return nil, err | ||
| } | ||
|
|
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| return log.Data, nil | ||
| } | ||
|
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| func (e *eventBinding) Bind(binding commontypes.BoundContract) error { | ||
| wasSubscribed := e.subscribed | ||
| if wasSubscribed { | ||
| if err := e.Unregister(); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| e.address = common.HexToAddress(binding.Address) | ||
| e.pending = binding.Pending | ||
| e.bound = true | ||
|
|
||
| if wasSubscribed { | ||
| return e.Register() | ||
| } | ||
| return nil | ||
| } |
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