@kamino-finance/kliquidity-sdk
Version:
Typescript SDK for interacting with the Kamino Liquidity (kliquidity) protocol
137 lines (119 loc) • 4.03 kB
text/typescript
/* eslint-disable @typescript-eslint/no-unused-vars */
import {
address,
Address,
fetchEncodedAccount,
fetchEncodedAccounts,
GetAccountInfoApi,
GetMultipleAccountsApi,
Rpc,
} from "@solana/kit"
/* eslint-enable @typescript-eslint/no-unused-vars */
import BN from "bn.js" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as borsh from "@coral-xyz/borsh" // eslint-disable-line @typescript-eslint/no-unused-vars
import { borshAddress } from "../utils" // eslint-disable-line @typescript-eslint/no-unused-vars
import * as types from "../types" // eslint-disable-line @typescript-eslint/no-unused-vars
import { PROGRAM_ID } from "../programId"
export interface TickArrayStateFields {
poolId: Address
startTickIndex: number
ticks: Array<types.TickStateFields>
initializedTickCount: number
padding: Array<number>
}
export interface TickArrayStateJSON {
poolId: string
startTickIndex: number
ticks: Array<types.TickStateJSON>
initializedTickCount: number
padding: Array<number>
}
export class TickArrayState {
readonly poolId: Address
readonly startTickIndex: number
readonly ticks: Array<types.TickState>
readonly initializedTickCount: number
readonly padding: Array<number>
static readonly discriminator = Buffer.from([
192, 155, 85, 205, 49, 249, 129, 42,
])
static readonly layout = borsh.struct<TickArrayState>([
borshAddress("poolId"),
borsh.i32("startTickIndex"),
borsh.array(types.TickState.layout(), 60, "ticks"),
borsh.u8("initializedTickCount"),
borsh.array(borsh.u8(), 115, "padding"),
])
constructor(fields: TickArrayStateFields) {
this.poolId = fields.poolId
this.startTickIndex = fields.startTickIndex
this.ticks = fields.ticks.map((item) => new types.TickState({ ...item }))
this.initializedTickCount = fields.initializedTickCount
this.padding = fields.padding
}
static async fetch(
rpc: Rpc<GetAccountInfoApi>,
address: Address,
programId: Address = PROGRAM_ID
): Promise<TickArrayState | null> {
const info = await fetchEncodedAccount(rpc, address)
if (!info.exists) {
return null
}
if (info.programAddress !== programId) {
throw new Error("account doesn't belong to this program")
}
return this.decode(Buffer.from(info.data))
}
static async fetchMultiple(
rpc: Rpc<GetMultipleAccountsApi>,
addresses: Address[],
programId: Address = PROGRAM_ID
): Promise<Array<TickArrayState | null>> {
const infos = await fetchEncodedAccounts(rpc, addresses)
return infos.map((info) => {
if (!info.exists) {
return null
}
if (info.programAddress !== programId) {
throw new Error("account doesn't belong to this program")
}
return this.decode(Buffer.from(info.data))
})
}
static decode(data: Buffer): TickArrayState {
if (!data.slice(0, 8).equals(TickArrayState.discriminator)) {
throw new Error("invalid account discriminator")
}
const dec = TickArrayState.layout.decode(data.slice(8))
return new TickArrayState({
poolId: dec.poolId,
startTickIndex: dec.startTickIndex,
ticks: dec.ticks.map(
(
item: any /* eslint-disable-line @typescript-eslint/no-explicit-any */
) => types.TickState.fromDecoded(item)
),
initializedTickCount: dec.initializedTickCount,
padding: dec.padding,
})
}
toJSON(): TickArrayStateJSON {
return {
poolId: this.poolId,
startTickIndex: this.startTickIndex,
ticks: this.ticks.map((item) => item.toJSON()),
initializedTickCount: this.initializedTickCount,
padding: this.padding,
}
}
static fromJSON(obj: TickArrayStateJSON): TickArrayState {
return new TickArrayState({
poolId: address(obj.poolId),
startTickIndex: obj.startTickIndex,
ticks: obj.ticks.map((item) => types.TickState.fromJSON(item)),
initializedTickCount: obj.initializedTickCount,
padding: obj.padding,
})
}
}