Is it possible to read the price of an asset on Tinyman from a stateful smart contract? Kind of like a on-chain oracle?

javier0rosasJavierOct 20, 2021

Kind of like a on-chain oracle?

Please help

BenOct 21, 2021

Yes, they’re storing information in local state of the pool contract, see python here for how its accessed.

github.com

tinymanorg/tinyman-py-sdk/blob/main/tinyman/v1/pools.py#L32-L51

    
      
          
          
asset1_id = get_state_int(validator_app_state, 'a1')
          asset2_id = get_state_int(validator_app_state, 'a2')
          
          
pool_logicsig = get_pool_logicsig(validator_app_id, asset1_id, asset2_id)
          pool_address = pool_logicsig.address()
          
          
assert(account_info['address'] == pool_address)
          
          
asset1_reserves = get_state_int(validator_app_state, 's1')
          asset2_reserves = get_state_int(validator_app_state, 's2')
          issued_liquidity = get_state_int(validator_app_state, 'ilt')
          unclaimed_protocol_fees = get_state_int(validator_app_state, 'p')
          
          
liquidity_asset = account_info['created-assets'][0]
          liquidity_asset_id = liquidity_asset['index']
          
          
outstanding_asset1_amount = get_state_int(validator_app_state, b64encode(b'o' + (asset1_id).to_bytes(8, 'big')))
          outstanding_asset2_amount = get_state_int(validator_app_state, b64encode(b'o' + (asset2_id).to_bytes(8, 'big')))
          outstanding_liquidity_asset_amount = get_state_int(validator_app_state, b64encode(b'o' + (liquidity_asset_id).to_bytes(8, 'big')))

Visit their docs or discord for more info

fabriceFabrice BenhamoudaOct 21, 2021

To complement @Ben 's excellent answer:

Before going into production, you must check with the TinyMan team that there is no risk they change the way data is stored in the smart contract in the future.

javier0rosasJavierOct 21, 2021

Thank you both very much!