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Fixes getStorageAt undeployed contract response #2250

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merged 4 commits into from
Nov 6, 2024
Merged

Fixes getStorageAt undeployed contract response #2250

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3e3564b
Fixes getStorageAt undeployed contract response
weiihann Nov 4, 2024
592eb95
add internal error check
weiihann Nov 5, 2024
ce85570
fix test
weiihann Nov 5, 2024
9e72cf1
use class hash
weiihann Nov 5, 2024
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7 changes: 7 additions & 0 deletions rpc/contract.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,13 @@ func (h *Handler) StorageAt(address, key felt.Felt, id BlockID) (*felt.Felt, *js
}
defer h.callAndLogErr(stateCloser, "Error closing state reader in getStorageAt")

// This checks if the contract exists because if a key doesn't exist in contract storage,
// the returned value is always zero and error is nil.
_, err := stateReader.ContractNonce(&address)
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if err != nil {
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return nil, ErrContractNotFound
}

value, err := stateReader.ContractStorage(&address, &key)
if err != nil {
return nil, ErrContractNotFound
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9 changes: 7 additions & 2 deletions rpc/contract_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -123,7 +123,8 @@ func TestStorageAt(t *testing.T) {

t.Run("non-existent contract", func(t *testing.T) {
mockReader.EXPECT().HeadState().Return(mockState, nopCloser, nil)
mockState.EXPECT().ContractStorage(gomock.Any(), gomock.Any()).Return(nil, errors.New("non-existent contract"))
// we check if the contract exists by getting its nonce
mockState.EXPECT().ContractNonce(gomock.Any()).Return(nil, errors.New("non-existent contract"))

storage, rpcErr := handler.StorageAt(felt.Zero, felt.Zero, rpc.BlockID{Latest: true})
require.Nil(t, storage)
Expand All @@ -132,7 +133,8 @@ func TestStorageAt(t *testing.T) {

t.Run("non-existent key", func(t *testing.T) {
mockReader.EXPECT().HeadState().Return(mockState, nopCloser, nil)
mockState.EXPECT().ContractStorage(gomock.Any(), gomock.Any()).Return(&felt.Zero, errors.New("non-existent key"))
// we check if the contract exists by getting its nonce
mockState.EXPECT().ContractNonce(gomock.Any()).Return(nil, errors.New("non-existent contract"))

storage, rpcErr := handler.StorageAt(felt.Zero, felt.Zero, rpc.BlockID{Latest: true})
require.Nil(t, storage)
Expand All @@ -143,6 +145,7 @@ func TestStorageAt(t *testing.T) {

t.Run("blockID - latest", func(t *testing.T) {
mockReader.EXPECT().HeadState().Return(mockState, nopCloser, nil)
mockState.EXPECT().ContractNonce(&felt.Zero).Return(nil, nil)
mockState.EXPECT().ContractStorage(gomock.Any(), gomock.Any()).Return(expectedStorage, nil)

storage, rpcErr := handler.StorageAt(felt.Zero, felt.Zero, rpc.BlockID{Latest: true})
Expand All @@ -152,6 +155,7 @@ func TestStorageAt(t *testing.T) {

t.Run("blockID - hash", func(t *testing.T) {
mockReader.EXPECT().StateAtBlockHash(&felt.Zero).Return(mockState, nopCloser, nil)
mockState.EXPECT().ContractNonce(&felt.Zero).Return(nil, nil)
mockState.EXPECT().ContractStorage(gomock.Any(), gomock.Any()).Return(expectedStorage, nil)

storage, rpcErr := handler.StorageAt(felt.Zero, felt.Zero, rpc.BlockID{Hash: &felt.Zero})
Expand All @@ -161,6 +165,7 @@ func TestStorageAt(t *testing.T) {

t.Run("blockID - number", func(t *testing.T) {
mockReader.EXPECT().StateAtBlockNumber(uint64(0)).Return(mockState, nopCloser, nil)
mockState.EXPECT().ContractNonce(&felt.Zero).Return(nil, nil)
mockState.EXPECT().ContractStorage(gomock.Any(), gomock.Any()).Return(expectedStorage, nil)

storage, rpcErr := handler.StorageAt(felt.Zero, felt.Zero, rpc.BlockID{Number: 0})
Expand Down