Protocol Info

Tokens
Acala Token
Name: Acala
Symbol: ACA
Decimal: 12
Total Fixed Supply: 1,000,000,000
Token type: Native / Tokens(ACA)
Check balance: system.account
Acala USD
Name: Acala USD
Symbol: aUSD
Decimal: 12
Token type: Tokens(AUSD)
Check balance: tokens.accounts
Total issuance: tokens.totalIssuance
Liquid DOT:
Name: Liquid DOT
Symbol: LDOT
Decimal: 10
Token type: Tokens(LDOT)
Check balance: tokens.accounts
Total issuance: tokens.totalIssuance
Liquid Crowdloan DOT
Name: Liquid Crowdloan DOT
Symbol: LCDOT
Decimal: 10
Token type: LiquidCrowdloan(13)
Check balance: tokens.accounts
Total issuance: tokens.totalIssuance
Account
Address Format
Acala uses the SS58 (Substrate) address format. Relevant SS58 prefixes are:
Acala: 10 (ss58 registry details)
Karura: 8 (ss58 registry details)
Mandala: 42
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 Karura token assets to other parachains foreign token list.
aUSD:
{ "parents": 1, "interior": { "X2": [{ "Parachain": 2000 }, { "GeneralKey": [0, 1] } ]}}
LDOT:
{ "parents": 1, "interior": { "X2": [{ "Parachain": 2000 }, { "GeneralKey": [0, 3] } ]}} 
ACA:
{ "parents": 1, "interior": { "X2": [{ "Parachain": 2000 }, { "GeneralKey": [0, 0] } ]}}
JS SDK
Acala.js: https://github.com/AcalaNetwork/acala.js​
Documentation: https://github.com/AcalaNetwork/acala.js/wiki​
Please also refer to the documentation of polkadot.js.

Acala Network

Token Transfer

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