Oracle canister

build

cargo run -p oracle_canister --features "export-api" > ./.artifact/oracle_canister.did

cargo build --target wasm32-unknown-unknown --release --package oracle_canister --features "export-api"

ic-wasm target/wasm32-unknown-unknown/release/oracle_canister.wasm -o ./.artifact/oracle_canister.wasm shrink

deploy local

terminal 0:

dfx start --clean

terminal 1:

dfx canister create --no-wallet oracle_canister

dfx build oracle_canister

dfx canister install oracle_canister --argument "record { evmc_principal=principal \"aaaaa-aa\";owner=principal \"$(dfx identity get-principal)\"}"

# add cryptocurrency pairs
dfx canister call oracle_canister add_pair '("bitcoin")'
dfx canister call oracle_canister add_pair '("ethereum")'
dfx canister call oracle_canister add_pair '("internet-computer")'
dfx canister call oracle_canister add_pair '("ordinals")'
dfx canister call oracle_canister add_pair '("dfuk")'
dfx canister call oracle_canister add_pair '("pepebrc")'
dfx canister call oracle_canister add_pair '("pizabrc")'
dfx canister call oracle_canister add_pair '("biso")'
dfx canister call oracle_canister add_pair '("meme-brc-20")'

Open link: http://127.0.0.1:8000/?canisterId=<Oracle_Canister_Id> such as http://127.0.0.1:8000/?canisterId=bnz7o-iuaaa-aaaaa-qaaaa-cai in browser.

work with test evmc

Open link: oracle canister in browser.

The Aggregator contract address in EVM canister is 0x4459c8e677022197efc196e1c87b8d9edbaa2a39.

here is the deploy details:

dfx build oracle_canister --network ic

dfx canister install oracle_canister --argument "record { evmc_principal=principal \"4fe7g-7iaaa-aaaak-aegcq-cai\";owner=principal \"$(dfx identity get-principal)\"}" -m=upgrade --network ic


# add supported cryptocurrencies
dfx canister call oracle_canister add_pair '("bitcoin")' --network ic
dfx canister call oracle_canister add_pair '("ethereum")' --network ic
dfx canister call oracle_canister add_pair '("internet-computer")' --network ic
dfx canister call oracle_canister add_pair '("ordinals")' --network ic
dfx canister call oracle_canister add_pair '("dfuk")' --network ic
dfx canister call oracle_canister add_pair '("pepebrc")' --network ic
dfx canister call oracle_canister add_pair '("pizabrc")' --network ic
dfx canister call oracle_canister add_pair '("biso")' --network ic
dfx canister call oracle_canister add_pair '("meme-brc-20")' --network ic

# ... the canister will get the price pair automatically

# get evm canister id
dfx canister call oracle_canister get_evmc_principal --network ic --query
(principal "4fe7g-7iaaa-aaaak-aegcq-cai")

dfx canister id oracle_canister --network ic
p6xvw-7iaaa-aaaap-aaana-cai

# we registry 0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5 for oracle canister in evmc
# check is_address_registered
dfx canister --network ic call evmc is_address_registered '("0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5", principal "p6xvw-7iaaa-aaaap-aaana-cai")' --query
(false)

dfx canister --network ic call oracle_canister get_self_address_in_evmc --query
(variant { Err = variant { Internal = "Account no registered yet" } })

dfx canister --network ic call oracle_canister register_self_in_evmc '(record {r="0x6e66f522e38b1dfa39ddffcea14f29ddcc6578c7f74fae43dedc30e718cb6ac3";s="0x34bae6555dd4ec275f80898931e3559158790bb999b8242037512e232c4ddf11";v="0xad676";to=opt "0xb0e5863d0ddf7e105e409fee0ecc0123a362e14b";gas="0x5208";maxFeePerGas=null;gasPrice=opt "0xa";value="0x186a0";blockNumber=null;from="0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5";hash="0x6944a74c0fa7d81c8b1f4d4a925f096c045d2dca0fa7c16246916963dd88b71d";blockHash=null;"type"=null;accessList=null;transactionIndex=null;nonce="0x0";maxPriorityFeePerGas=null;input="";chainId=opt "0x56b29"}, vec {162:nat8;62:nat8;47:nat8;13:nat8;71:nat8;239:nat8;148:nat8;14:nat8;161:nat8;184:nat8;41:nat8;139:nat8;136:nat8;208:nat8;92:nat8;34:nat8;152:nat8;57:nat8;9:nat8;92:nat8;46:nat8;9:nat8;159:nat8;219:nat8;250:nat8;90:nat8;77:nat8;182:nat8;231:nat8;233:nat8;101:nat8;60:nat8})'
(variant { Ok })

dfx canister --network ic call evmc is_address_registered '("0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5", principal "p6xvw-7iaaa-aaaap-aaana-cai")' --query
(true)

dfx canister --network ic call oracle_canister get_self_address_in_evmc --query
(variant { Ok = "0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5" })

dfx canister --network ic call evmc account_basic '("0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5")' --query
(record { balance = "0x3b960f10"; nonce = "0x1" })

# deploy AggregatorSingle in evmc
dfx canister --network ic call oracle_canister deploy_aggregator_contract
(
  variant {
    Ok = "0xa49232951f5b790e8d952d98be7bb2ac6d0d8ba6899bfd4c079abebee5c48c6e"
  },
)

# we can see https://explorer.bitfinity.network/tx/0xa49232951f5b790e8d952d98be7bb2ac6d0d8ba6899bfd4c079abebee5c48c6e

dfx canister --network ic call evmc eth_get_transaction_receipt '("0xa49232951f5b790e8d952d98be7bb2ac6d0d8ba6899bfd4c079abebee5c48c6e")' --query
(
  variant {
    Ok = opt record {
      to = null;
      status = opt "0x1";
      output = opt blob "...";
      transactionHash = "0xa49232951f5b790e8d952d98be7bb2ac6d0d8ba6899bfd4c079abebee5c48c6e";
      cumulativeGasUsed = "0x0";
      blockNumber = "0x4db";
      from = "0xe49f07de45ae4333a6d70f097501f4a4b7dab0a5";
      logs = vec {};
      blockHash = "0xa147112e16baa2185be3d1c401c2bd9697b5492a51651c36480da6df099896a9";
      root = null;
      "type" = null;
      transactionIndex = "0x0";
      effectiveGasPrice = null;
      logsBloom = "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000";
      contractAddress = opt "0x4459c8e677022197efc196e1c87b8d9edbaa2a39";
      gasUsed = opt "0x11589b";
    }
  },
)

# confirm aggregator deployed successfully
dfx canister --network ic call oracle_canister confirm_aggregator_contract
(variant { Ok = "0x4459c8e677022197efc196e1c87b8d9edbaa2a39" })

dfx canister --network ic call oracle_canister get_aggregator_contract_address
(variant { Ok = "0x4459c8e677022197efc196e1c87b8d9edbaa2a39" })

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("bitcoin", "0x8", "bitcoin-usd price", "0x1")'
(
  variant {
    Ok = "0x7b21ec13a2aa406bca6147e1f08f13d40fac268fe74fa638b7bfabdf484a82a5"
  },
)
# https://explorer.bitfinity.network/tx/0x7b21ec13a2aa406bca6147e1f08f13d40fac268fe74fa638b7bfabdf484a82a5

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("ethereum", "0x8", "ethereum-usd price", "0x1")'
(
  variant {
    Ok = "0x48f63d5a3598fa3def9992b9360f250a59c835b8c3bd61f5b3927fa532f5a2c1"
  },
)

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("internet-computer", "0x8", "icp-usd price", "0x1")'
(
  variant {
    Ok = "0x3a7bf3e63fa63b2aff6300746ae7478332b7b0464ea4685d2c61bdeb7f66d23c"
  },
)

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("ordinals", "0x8", "ord-usd price", "0x1")'
(
  variant {
    Ok = "0x101885cf854a82b35b4c795b2bf07da53d8e233c043f32aea8334db2ed7a6f77"
  },
)

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("dfuk", "0x8", "dfuk price", "0x1")'
(
  variant {
    Ok = "0x4d144d37475b60f9498312d62923fb1550223d293fb34777c36ea6879ca8e54b"
  },
)

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("pepebrc", "0x8", "pepebrc-usd price", "0x1")'
(
  variant {
    Ok = "0xe24fdb0ce62b91594b3451052baa86128e8702beec97627232c5ac96421a041e"
  },
)

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("pizabrc", "0x8", "pizabrc-usd price", "0x1")'
(
  variant {
    Ok = "0x35fa4a66f9d3ba1401e8c134c3c8fb3efde78ca29e082767fee00ed8ef037133"
  },
)
dfx canister --network ic call oracle_canister add_pair_in_aggregator '("biso", "0x8", "biso-usd price", "0x1")'
(
  variant {
    Ok = "0x471973a6a961acd272c0a6bcc42e6e01c1d0d76fdeddf961b240e2a4b0af46f0"
  },
)

dfx canister --network ic call oracle_canister add_pair_in_aggregator '("meme-brc-20", "0x8", "meme(brc)-usd price", "0x1")'
(
  variant {
    Ok = "0x4364277a2f79ab095f81b3c4a2a12ca2819ed3c4852947f22bbe0faf609d3c32"
  },
)

dfx canister --network ic call oracle_canister update_answers '(vec {"bitcoin"},vec {"0x1767D7FA49F0534F"},vec {"0x259FBCF1F00"})'
(
  variant {
    Ok = "0x7b21ec13a2aa406bca6147e1f08f13d40fac268fe74fa638b7bfabdf484a82a5"
  },
)

dfx canister --network ic call oracle_canister update_answers '(vec {"ethereum";"internet-computer";"ordinals";"dfuk";"pepebrc"},vec {"0x1767E90EF6FF5509";"0x1767E90EF6FF5509";"0x1767E90EF6FF5509";"0x1767E90EF6FF5509";"0x1767E90EF6FF5509"},vec {"0x289C6BC3C0";"0x15DFF9C0";"0x1E477700";"0xD0DACC0";"0x0"})'
(
  variant {
    Ok = "0x8d473fe147bec1c917239d186ac2005926159cdb18cb0823427f4513b0d90efc"
  },
)


dfx canister --network ic call oracle_canister update_answers '(vec {"pizabrc";"biso";"meme-brc-20"},vec {"0x1767E90EF6FF5509";"0x1767E90EF6FF5509";"0x1767E90EF6FF5509";},vec {"0x750698";"0xB3CFC";"0x7866C100"})'
(
  variant {
    Ok = "0x2a2ce0056275cd92d260a39c675b1b903a9035192fcb9afb303ed4888e877309"
  },
)

# since all functions work, we start the timer to feed price automatically:
dfx canister --network ic call oracle_canister start_feed_price_timer
()

check the contract

First switch the Metamask network to Bitfinity, for details, please refer to docs.

Then we go to remix copy AggregatorV3Interface in, then compile, and finally enter DEPLOY & RUN TRANSACTIONS, select Injected Provider-Metamask for ENVIRONMENT, paste the oracle contract address 0x4459c8e677022197efc196e1c87b8d9edbaa2a39 to At Address, click At Address, you can get direct query interface:

bitfinity-network/oracle-canister

Oracle canister

build

deploy local

work with test evmc

check the contract