SdkPool

SDK class encapsulating stableswap pool functions.

This class will either interact with internal StableSwapFacet pools or external StableSwap pools depending on which type of pool is being used for each asset. Note: SDK currently only supports internal StableSwapFacet pools.

Hierarchy

SdkShared
↳ SdkPool

Methods

addLiquidity

▸ addLiquidity(domainId, tokenAddress, amounts, minToMint?, deadline?): Promise<TransactionRequest>

Prepares the transaction request for adding liquidity to a pool.

Parameters

Name

Type

Default value

Description

domainId

string

undefined

The domain ID of the pool.

tokenAddress

string

undefined

The address of local or adopted token.

amounts

string[]

undefined

The amounts of the tokens to swap.

minToMint

string

"0"

(optional) The minimum acceptable amount of LP tokens to mint.

deadline

number

undefined

(optional) The deadline for the operation.

Returns

Promise<TransactionRequest>

providers.TransactionRequest object.

calculateAddLiquidityPriceImpact

▸ calculateAddLiquidityPriceImpact(domainId, tokenAddress, amountX, amountY): Promise<undefined | BigNumber>

Calculates the price impact of adding liquidity to a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

amountX

string

The amount of token X (index 0 of the pool), in the token's native precision.

amountY

string

The amount of token Y (index 1 of the pool), in the token's native precision.

Returns

Promise<undefined | BigNumber>

Price impact for adding liquidity, in 1e18 precision.

calculatePriceImpact

▸ calculatePriceImpact(tokenInputAmount, tokenOutputAmount, virtualPrice?, isDeposit?): BigNumber

Calculates the price impact depending on whether liquidity is being deposited or withdrawn.

Parameters

Name

Type

Default value

Description

tokenInputAmount

BigNumber

undefined

The amount of inbound tokens (LP tokens for withdrawals, total tokens for deposits, dx for swaps), in 1e18 precision.

tokenOutputAmount

BigNumber

undefined

The amount of outbound tokens (total tokens for withdrawals, LP tokens for deposits, dy for swaps), in 1e18 precision.

virtualPrice

BigNumber

undefined

(optional) The current virtual price of the pool.

isDeposit

boolean

true

(optional) Whether this is a deposit or withdrawal.

Returns

BigNumber

The price impact.

calculateRemoveLiquidityPriceImpact

▸ calculateRemoveLiquidityPriceImpact(domainId, tokenAddress, amountX, amountY): Promise<undefined | BigNumber>

Returns the price impact of removing liquidity from a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

amountX

string

The amount of token X (index 0 of the pool), in the token's native precision.

amountY

string

The amount of token Y (index 1 of the pool), in the token's native precision.

Returns

Promise<undefined | BigNumber>

The price impact for removing liquidity, in 1e18 precision.

calculateRemoveSwapLiquidityOneToken

▸ calculateRemoveSwapLiquidity(domainId, tokenAddress, amount, index): Promise<BigNumber>

Calculates the amounts of underlying tokens returned.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

amount

string

The amount of the LP token to burn on withdrawal.

index

number

The index of the token to withdraw.

Returns

Promise<BigNumber>

Calculated amount of underlying token returned.

calculateRemoveSwapLiquidity

▸ calculateRemoveSwapLiquidity(domainId, tokenAddress, amount): Promise<BigNumber[]>

Calculates the amounts of underlying tokens returned.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

amount

string

The amount of the LP token to burn on withdrawal.

Returns

Promise<BigNumber[]>

Array containing amount of each underlying token returned, in correct index order.

calculateSwap

▸ calculateSwap(domainId, tokenAddress, tokenIndexFrom, tokenIndexTo, amount): Promise<BigNumber>

Calculates the amount of tokens received on a swap.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

tokenIndexFrom

number

The index of the token to sell.

tokenIndexTo

number

The index of the token to buy.

amount

BigNumberish

The number of tokens to sell, in the "From" token's native decimal precision.

Returns

Promise<BigNumber>

Minimum amount received, in the "To" token's native decimal precision.

calculateSwapPriceImpact

▸ calculateSwapPriceImpact(domainId, amountX, tokenX, tokenY): Promise<BigNumber>

Calculates the price impact of a swap.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

amountX

string

The amount of tokens to swap, in the token's native precision.

tokenX

string

The address of the token to swap from.

tokenY

string

The address of the token to swap to.

Returns

Promise<BigNumber>

The price impact for swapping, in 1e18 precision.

calculateTokenAmount

▸ calculateTokenAmount(domainId, tokenAddress, amounts, isDeposit?): Promise<BigNumber>

Calculates the minimum LP token amount from deposits or withdrawals.

Parameters

Name

Type

Default value

Description

domainId

string

undefined

The domain ID of the pool.

tokenAddress

string

undefined

The address of local or adopted token.

amounts

string[]

undefined

The amounts of the tokens to deposit/withdraw, in the correct index order and in each token's native precision.

isDeposit

boolean

true

(optional) Whether this is a deposit or withdrawal.

Returns

Promise<BigNumber>

Minimum LP tokens received, in 1e18 precision.

calculateYield

▸ calculateYield(feesEarned, principal, days): Object

Calculates apr and apy.

Parameters

Name

Type

Description

feesEarned

number

The total fees earned in the period.

principal

number

The principal amount at the start of the period.

days

number

The number of days to look back.

Returns

Object

Object containing apr and apy.

Name

Type

apr

number

apy

number

getAdopted

▸ getAdopted(domainId, tokenAddress): Promise<string>

Reads the adopted token.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

Returns

Promise<string>

The adopted token.

getDefaultDeadline

▸ getDefaultDeadline(): number

Set to 1 hour from current time.

Returns

number

The default deadline, in unix time.

getLPTokenAddress

▸ getLPTokenAddress(domainId, tokenAddress): Promise<string>

Reads the LP token address of a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

Returns

Promise<string>

The LP token address.

getPoolTokenAddress

▸ getPoolTokenAddress(domainId, tokenAddress, index): Promise<string>

Reads the token address of a specified index in a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

index

number

The index of the token in the pool.

Returns

Promise<string>

The address of the specified token in the pool.

getPoolTokenBalance

▸ getPoolTokenBalance(domainId, tokenAddress, poolTokenAddress): Promise<BigNumber>

Reads the balance of a pool token.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

poolTokenAddress

string

The address of the pool token.

Returns

Promise<BigNumber>

The balance of the pool token.

getPoolTokenIndex

▸ getPoolTokenIndex(domainId, tokenAddress, poolTokenAddress): Promise<number>

Reads the index of a token in a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of the local or adopted token.

poolTokenAddress

string

The address of the token in the pool to get the index for.

Returns

Promise<number>

The index of the specified token in the pool or -1 if not found.

getPoolTokenDecimals

▸ getPoolTokenDecimals(domainId, tokenAddress, poolTokenAddress): Promise<number>

Reads the decimal precision of a token in a pool.

Parameters

Name

Type

Description

domainId

string

The domain id of the pool.

tokenAddress

string

The address of local or adopted token.

poolTokenAddress

string

The address of the token in the pool to get the precision for.

Returns

Promise<number>

The decimal precision of the specified token in the pool or -1 if not found.

getRepresentation

▸ getRepresentation(domainId, tokenAddress): Promise<string>

Reads the representation asset of the pool. The representation asset is the adopted asset on the canonical domain and local (nextAsset) otherwise.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

Returns

Promise<string>

The representation (local or adopted) token.

getTokenPrice

▸ getTokenPrice(tokenSymbol): Promise<any>

Fetches the current price of a token.

Parameters

Name

Type

Description

tokenSymbol

string

The symbol for the token.

Returns

Promise<any>

The price of the token.

getTokenSupply

▸ getTokenSupply(domainId, tokenAddress): Promise<BigNumber>

Reads the ERC20 token supply.

Parameters

Name

Type

Description

domainId

string

The domain ID of the ERC20 token.

tokenAddress

string

The address of the ERC20 token.

Returns

Promise<BigNumber>

The balance of the address.

getTokenUserBalance

▸ getTokenUserBalance(domainId, tokenAddress, userAddress): Promise<BigNumber>

Reads the ERC20 token balance of an address.

Parameters

Name

Type

Description

domainId

string

The domain ID of the ERC20 token.

tokenAddress

string

The address of the ERC20 token.

userAddress

string

The address to get the balance of.

Returns

Promise<BigNumber>

The balance of the address.

getUserPools

▸ getUserPools(domainId, userAddress): Promise<{ info: Pool ; lpTokenBalance: BigNumber ; poolTokenBalances: BigNumber[] }[]>

Retrieves the Pools that a user has LP tokens for.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

userAddress

string

The address of the user to get the pools for.

Returns

Promise<{ info: Pool ; lpTokenBalance: BigNumber ; poolTokenBalances: BigNumber[] }[]>

Array of Pool objects.

getVirtualPrice

▸ getVirtualPrice(domainId, tokenAddress): Promise<BigNumber>

Reads the virtual price of a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

Returns

Promise<BigNumber>

The virtual price, scaled to the pool's decimal precision (10^18).

getYieldStatsForDays

▸ getYieldStatsForDays(domainId, tokenAddress, unixTimestamp, days): Promise<undefined | { totalFeesFormatted: number ; totalLiquidityFormatted: number ; totalVolume: BigNumber ; totalVolumeFormatted: number }>

Calculates the fees, liquidity, and volume of a pool for the days prior to the specified unix time.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

unixTimestamp

number

The unix time to start the look back from.

days

number

The number of days to look back.

Returns

Promise<undefined | { totalFeesFormatted: number ; totalLiquidityFormatted: number ; totalVolume: BigNumber ; totalVolumeFormatted: number }>

Object containing fees, liquidity, and volume, in 1e18 precision.

removeLiquidity

▸ removeLiquidity(domainId, tokenAddress, amount, minAmounts?, deadline?): Promise<TransactionRequest>

Returns the transaction request for removing liquidity from a pool.

Parameters

Name

Type

Description

domainId

string

The domain ID of the pool.

tokenAddress

string

The address of local or adopted token.

amount

string

The amount of LP tokens to burn.

minAmounts

string[]

(optional) The minimum amounts of each token to withdraw.

deadline

number

(optional) The deadline for the operation.

Returns

Promise<TransactionRequest>

providers.TransactionRequest object.

removeLiquidityOneToken

▸ removeLiquidityOneToken(domainId, tokenAddress, amount, minAmount?, deadline?): Promise<TransactionRequest>

Returns the transaction request for removing liquidity from a pool.

Parameters

Name

Type

Default value

Description

domainId

string

undefined

The domain ID of the pool.

tokenAddress

string

undefined

The address of local or adopted token.

withdrawTokenAddress

string

undefined

The address of the token to withdraw.

amount

string

undefined

The amount of LP tokens to burn.

minAmount

string

"0"

(optional) The minimum acceptable amount of the token to withdraw.

deadline

number

One hour from current time.

(optional) The deadline for the operation.

Returns

Promise<TransactionRequest>

providers.TransactionRequest object.

removeLiquidityImbalance

▸ removeLiquidityImbalance(domainId, tokenAddress, amounts, maxBurnAmount?, deadline?): Promise<TransactionRequest>

Returns the transaction request for removing liquidity from a pool.

Parameters

Name

Type

Default value

Description

domainId

string

undefined

The domain ID of the pool.

tokenAddress

string

undefined

The address of local or adopted token.

amounts

string[]

undefined

The amount of LP tokens to burn.

maxBurnAmount

string

"0" (Use total LP balance)

(optional) The max LP tokens the user is willing to burn.

deadline

number

One hour from current time.

(optional) The deadline for the operation.

Returns

Promise<TransactionRequest>

providers.TransactionRequest object.

swap

▸ swap(domainId, tokenAddress, from, to, amount, minDy?, deadline?): Promise<TransactionRequest>

Returns the transaction request for performing a swap in a pool.

Parameters

Name

Type

Default value

Description

domainId

string

undefined

The domain ID of the pool.

tokenAddress

string

undefined

The address of local or adopted token.

from

string

undefined

The address of the token to sell.

to

string

undefined

The address of the token to buy.

amount

string

undefined

The amount of the selling token to swap.

minDy

number

0

(optional) The minimum amount of the buying token to receive.

deadline

number

undefined

(optional) The deadline for the operation.

Returns

Promise<TransactionRequest>

providers.TransactionRequest object.

create

▸ Static create(_config): Promise<SdkPool>

Create a singleton instance of the SdkPool class.

Parameters

Name

Type

Default value

Description

_config

Object

undefined

SdkConfig object.

_config.chains

Record<string, { providers: string[] }>

undefined

Chain config, at minimum with providers for each chain.

_config.signerAddress

string

undefined

Signer address for transactions.

_config.logLevel

"info"

(optional) Logging severity level.

_config.network

"testnet" | "mainnet"

"mainnet"

(optional) Blockchain environment to interact with.

Returns

Promise<SdkPool>

providers.TransactionRequest object.

Example

import { SdkPool } from "@connext/sdk";

const config = {
  signerAddress: "<wallet_address>",
  network: "mainnet",
  chains: {
    6648936: { // the domain ID for Ethereum Mainnet
      providers: ["https://rpc.ankr.com/eth"],
    },
    1869640809: { // the domain ID for Optimism
      providers: ["https://mainnet.optimism.io"]
    },
    1886350457: { // the domain ID for Polygon
      providers: ["https://polygon-rpc.com"]
    },
  },
}

const sdkPool = await SdkPool.create(config);

See the Deployments page for all domain IDs and asset addresses.

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Last updated 11 months ago