Protocol Info

Tokens

Name
Symbol
Decimal
ED
Token Type
Check Balance
Total issuance
Acala
ACA
12
0.1
Native / Tokens(ACA)
system.account
1,000,000,000
Acala USD
aUSD
12
0.1
Tokens(AUSD)
tokens.accounts
tokens.totalIssuance
Polkadot
DOT
10
0.01
Tokens(DOT)
tokens.accounts
tokens.totalIssuance
Liquid DOT
LDOT
10
0.05
Tokens(LDOT)
tokens.accounts
tokens.totalIssuance
Liquid Crowdloan DOT
LCDOT
10
LiquidCrowdloan(13)
tokens.accounts
tokens.totalIssuance
Tapio DOT
tDOT
10
0.01
StableAssetId(0)
tokens.accounts
tokens.totalIssuance
Moonbeam
GLMR
18
0.1
ForeignAssetId(0)
tokens.accounts
tokens.totalIssuance
Parallel
PARA
12
0.1
ForeignAssetId(1)
tokens.accounts
tokens.totalIssuance

Account

Address Format

Acala uses the SS58 (Substrate) address format. Relevant SS58 prefixes are:

Existential Deposit

Acala uses an existential deposit (ED) to prevent dust accounts from bloating state. If an account drops below the ED, it will be removed from this account and be donated to the Treasury.
ED of native token ACA is configured in the runtime. Non-native tokens (DOT, aUSD, BTC etc) can be queried via SDK. The amount of ED can only be decreased, not increased, therefore it often starts with a higher number.
transfer and deposit in pallet_balances and orml_tokens will check the ED of the receiver account. A transaction may fail due to not meeting ED requirements, a typical one would be a user is swapping token A for token B, where token A balance no longer meets ED requirements. A front-end DApp shall perform checks and prompt user for such incidents.
Read more on ED here.

Protocol Fees

  • Mint aUSD with DOT & lDOT:
    • Liquidation penalty: 12%
    • Stability Fee: 3%

Transaction Fees

Acala uses weight-based fees, unlike gas, are predictable and charged pre-dispatch. See the transaction fee page for more info.

Types

Type definitions allow the SDK to know how to serialize / deserialize blocks, transactions and events.
Acala's type definition bundle can be found here.

MultiLocation

You can use these MultiLocation to add Acala token assets to other parachains foreign token list.
Asset Name: Acala Dollar Asset Symbol: AUSD Decimals: 12 existentialDeposit: 0.1
{"parents": 1, "interior": {"X2": [{"Parachain": 2000}, {"GeneralKey": 0x0001} ]}}
Asset Name: Liquid DOT Asset Symbol: LDOT Decimals: 10 existentialDeposit: 0.05
{"parents": 1, "interior": {"X2": [{"Parachain": 2000}, {"GeneralKey": 0x0003} ]}}
Asset Name: Acala Native Token Asset Symbol: ACA Decimals: 12 existentialDeposit: 0.1
{"parents": 1, "interior": {"X2": [{"Parachain": 2000}, {"GeneralKey": 0x0000} ]}}

Autogenerated MultiLocations

Click Run to generate the current full list of MultiLocations

JS SDK

Please also refer to the documentation of polkadot.js.