@namgold/dmm-solana-sdk

Creating a AnchorProvider instance

import { AnchorProvider } from '@project-serum/anchor'

const anchorProvider = AnchorProvider.env()

Creating a Router instance

const router = new Router(
  new Context(
    anchorProvider,
    'KyberSwapFactory111111111111111111111111111',
    'KyberSwapPooL111111111111111111111111111111',
    'KyberSwapRouter1111111111111111111111111111',
  ),
  new PublicKey(process.env.ROUTER_STATE_ADDRESS!),
)

Examples

• Put addresses into examples/.env file
  • Required: ANCHOR_PROVIDER_URL, ANCHOR_WALLET, KYBERSWAP_POOL_PROGRAM, KYBERSWAP_FACTORY_PROGRAM, KYBERSWAP_ROUTER_PROGRAM, FACTORY_STATE_ADDRESS, ROUTER_STATE_ADDRESS
  • E.g

ANCHOR_PROVIDER_URL=https://api.testnet.solana.com
ANCHOR_WALLET=/Users/username/.config/solana/id.json
KYBERSWAP_POOL_PROGRAM=5ep1RDH89G1edSjJCqDzamXBg2yXNEZTxwAReD3FWa8j
KYBERSWAP_FACTORY_PROGRAM=HuRvNfEovfUomar3qNhngZc34EygX9kHNfujhwF1YLjz
KYBERSWAP_ROUTER_PROGRAM=3EN91sb7qdzSMPJZEkSUey1oe4hHEDFar1Kp3jTZWyhg
FACTORY_STATE_ADDRESS=HWoZFnLkKeGHrHwu9sySFts3oTVfDfQ9TnwXEqpSGU5D
ROUTER_STATE_ADDRESS=ASBnocaA9kg8QgyZZ23o7C9scVrxPaWZVLP1PEwhyqBw
COMMITMENT_LEVEL=confirmed
KNC_MINT=KNCVyKuChfKTLDJ3EQEatqF4kBEF2PNECoTRWsx5qXz
ETH_MINT=ETHTjGKn8ze4Cbk3tWK6MKAV5v3xswpCvbXo1mQapzn8
BNB_MINT=BNBbo7KptCeBm9eZFHeUTSLwtxTJTAwsZr6yYri497jg
BTC_MINT=BTCfmTMzFeV4BNvCiyTVVR1XaQPMvsrrdyjJeuE4VdEm

• To ensure token accounts have been created, run spl-token accounts

• Run yarn run ts-node examples/{THE_EXAMPLE_TO_RUN_FILENAME}.ts

Add Liquidity New Pool

• Call Router's method addLiquidityNewPool to construct a ready-to-send transaction

const tx = await router.addLiquidityNewPool(
  anchorProvider.wallet.publicKey,
  KNC,
  BNB,
  20000,
  1,
  kncAmount,
  bnbAmount,
  new BN(0),
  new BN(0),
)

• Because AddLiquidityNewPool needs more than 400_000 compute units, we should request more compute unit
  • Use method createRequestUnitsInstruction to construct a request CU instruction
  • Put request CU instruction to the current transaction's instruction list

tx.instructions = [createRequestUnitsInstruction(Router.ADD_LIQUIDITY_NEW_POOL_COMPUTE_BUDGET, 0), ...tx.instructions]

Add Liquidity

• Call Router's method addLiquidity to construct a ready-to-send transaction

const tx = await router.addLiquidity(
  poolStateAddress,
  anchorProvider.wallet.publicKey,
  KNC,
  kncAmount,
  bnbAmount,
  new BN(0),
  new BN(0),
)

Remove Liquidity

• Call Router's method removeLiquidity to construct a ready-to-send transaction

const tx = await router.removeLiquidity(
  poolStateAddress,
  anchorProvider.wallet.publicKey,
  KNC,
  liquidityAmount,
  new BN(0),
  new BN(0),
)

Swap

• Call Router's method swap to construct a ready-to-send transaction

const tx = await router.swap(anchorProvider.wallet.publicKey, trade, {
  allowedSlippage: new Percent('1', '100'),
})

Send transaction

• Use method sendAndConfirmTransaction to sign transaction (using Wallet) then send to nodes and wait for confirmation

const txHash = await sendAndConfirmTransaction(anchorProvider, tx)

• A transaction hash will be returned if the transaction's successful