git.delta.rocks / unique-network / refs/commits / ce474613fd5f

1//! NFT Chain Extension23//4// This file is subject to the terms and conditions defined in5// file 'LICENSE', which is part of this source code package.6//78use codec::{Decode, Encode};910pub use pallet_contracts::chain_extension::RetVal;11use pallet_contracts::chain_extension::{12    ChainExtension, Environment, Ext, InitState, SysConfig, UncheckedFrom,13};1415pub use frame_support::debug;16use frame_support::dispatch::DispatchError;1718extern crate pallet_nft;19pub use pallet_nft::*;20use crate::Runtime;21use sp_runtime::AccountId32;22use crate::Vec;2324/// Transfer parameters25#[derive(Debug, PartialEq, Encode, Decode)]26pub struct NFTExtTransfer<E: Ext> {27    pub recipient: <E::T as SysConfig>::AccountId,28    pub collection_id: u32,29    pub token_id: u32,30    pub amount: u128,31}3233/// The chain Extension of NFT pallet34pub struct NFTExtension;3536impl<C: Config> ChainExtension<C> for NFTExtension {37    fn call<E: Ext>(func_id: u32, env: Environment<E, InitState>) -> Result<RetVal, DispatchError>38    where39        <E::T as SysConfig>::AccountId: UncheckedFrom<<E::T as SysConfig>::Hash> + AsRef<[u8]>,40    {41        // The memory of the vm stores buf in scale-codec42        match func_id {43            0 => {44                let mut env = env.buf_in_buf_out();45                let input: NFTExtTransfer<E> = env.read_as()?;4647                // Sender to AccountId3248                let mut bytes_sender: [u8; 32] = [0; 32];49                let addr_vec_sender: Vec<u8> = env.ext().caller().encode();50                for i in 0..32 {51                    bytes_sender[i] = addr_vec_sender[i];52                }53                let sender = AccountId32::from(bytes_sender);5455                // Recipient to AccountId3256                let mut bytes_rec: [u8; 32] = [0; 32];57                let addr_vec_rec: Vec<u8> = input.recipient.encode();58                for i in 0..32 {59                    bytes_rec[i] = addr_vec_rec[i];60                }61                let recipient = AccountId32::from(bytes_rec);6263                let collection = pallet_nft::Module::<Runtime>::get_collection(input.collection_id)?;6465                match pallet_nft::Module::<Runtime>::transfer_internal(sender, recipient, &collection, input.token_id, input.amount) {66                    Ok(_) => Ok(RetVal::Converging(func_id)),67                    _ => Err(DispatchError::Other("Transfer error"))68                }69            },70			_ => {71				panic!("Passed unknown func_id to test chain extension: {}", func_id);72            }73        }74    }75}