stake.ts

import {
  fixCodecSize,
  getArrayCodec,
  getBytesCodec,
  getStructCodec,
  getU32Codec,
  getU64Codec,
} from '@solana/codecs';
import type { ReadonlyUint8Array } from '@solana/codecs';

const authorizedCodec = getStructCodec([
  ['staker', fixCodecSize(getBytesCodec(), 32)],
  ['withdrawer', fixCodecSize(getBytesCodec(), 32)],
]);
const lockupCodec = getStructCodec([
  ['unixTimestamp', getU64Codec()],
  ['epoch', getU64Codec()],
  ['custodian', fixCodecSize(getBytesCodec(), 32)],
]);
const metaCodec = getStructCodec([
  ['rentExemptReserve', getU64Codec()],
  ['authorized', authorizedCodec],
  ['lockup', lockupCodec],
]);
const delegationCodec = getStructCodec([
  ['voterPubkey', fixCodecSize(getBytesCodec(), 32)],
  ['stake', getU64Codec()],
  ['activationEpoch', getU64Codec()],
  ['deactivationEpoch', getU64Codec()],
  ['unused', getU64Codec()],
]);
const stakeCodec = getStructCodec([
  ['delegation', delegationCodec],
  ['creditsObserved', getU64Codec()],
]);
export const stakeAccountCodec = getStructCodec([
  ['discriminant', getU32Codec()],
  ['meta', metaCodec],
  ['stake', stakeCodec],
]);

const stakeHistoryEntryCodec = getStructCodec([
  ['epoch', getU64Codec()],
  ['effective', getU64Codec()],
  ['activating', getU64Codec()],
  ['deactivating', getU64Codec()],
]);
export const stakeHistoryCodec = getArrayCodec(stakeHistoryEntryCodec, {
  size: getU64Codec(),
});

export interface StakeAccount {
  discriminant: number;
  meta: Meta;
  stake: Stake;
}

export interface Meta {
  rentExemptReserve: bigint;
  authorized: Authorized;
  lockup: Lockup;
}

export interface Authorized {
  staker: Uint8Array;
  withdrawer: Uint8Array;
}

export interface Lockup {
  unixTimestamp: bigint;
  epoch: bigint;
  custodian: Uint8Array;
}

export interface Stake {
  delegation: Delegation;
  creditsObserved: bigint;
}

export interface Delegation {
  voterPubkey: ReadonlyUint8Array;
  stake: bigint;
  activationEpoch: bigint;
  deactivationEpoch: bigint;
  unused: bigint;
}

export interface StakeHistoryEntry {
  epoch: bigint;
  effective: bigint;
  activating: bigint;
  deactivating: bigint;
}