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external.go
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external.go
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package evmimpl
import (
"github.com/ethereum/go-ethereum/common"
"github.com/iotaledger/wasp/packages/evm/solidity"
"github.com/iotaledger/wasp/packages/isc"
"github.com/iotaledger/wasp/packages/kv"
"github.com/iotaledger/wasp/packages/vm/core/evm"
"github.com/iotaledger/wasp/packages/vm/core/evm/emulator"
"github.com/iotaledger/wasp/packages/vm/core/evm/iscmagic"
)
func Nonce(evmPartition kv.KVStoreReader, addr common.Address) uint64 {
emuState := evm.EmulatorStateSubrealmR(evmPartition)
stateDBStore := emulator.StateDBSubrealmR(emuState)
return emulator.GetNonce(stateDBStore, addr)
}
func RegisterERC721NFTCollectionByNFTId(store kv.KVStore, nft *isc.NFT) {
metadata, err := isc.IRC27NFTMetadataFromBytes(nft.Metadata)
if err != nil {
panic(errEVMCanNotDecodeERC27Metadata)
}
addr := iscmagic.ERC721NFTCollectionAddress(nft.ID)
state := emulator.NewStateDBFromKVStore(emulator.StateDBSubrealm(store))
if state.Exist(addr) {
panic(errEVMAccountAlreadyExists)
}
state.CreateAccount(addr)
state.SetCode(addr, iscmagic.ERC721NFTCollectionRuntimeBytecode)
// see ERC721NFTCollection_storage.json
state.SetState(addr, solidity.StorageSlot(2), solidity.StorageEncodeBytes32(nft.ID[:]))
for k, v := range solidity.StorageEncodeString(3, metadata.Name) {
state.SetState(addr, k, v)
}
addToPrivileged(store, addr)
}