/
Transaction.ts
60 lines (48 loc) · 1.6 KB
/
Transaction.ts
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/* eslint-disable class-methods-use-this */
import proto from '@helium/proto'
interface ChainVars {
txnFeeMultiplier?: number
dcPayloadSize?: number
stakingFeeTxnAssertLocationV1?: number
stakingFeeTxnAddGatewayV1?: number
}
export default abstract class Transaction {
static txnFeeMultiplier: number = 0
static dcPayloadSize: number = 24
static stakingFeeTxnAssertLocationV1: number = 1
static stakingFeeTxnAddGatewayV1: number = 1
abstract serialize(): Uint8Array
message(): Uint8Array {
throw new Error('unimplemented')
}
abstract sign(opts: object): Promise<any>
static config(vars: ChainVars) {
if (vars.txnFeeMultiplier) {
Transaction.txnFeeMultiplier = vars.txnFeeMultiplier
}
if (vars.dcPayloadSize) {
Transaction.dcPayloadSize = vars.dcPayloadSize
}
if (vars.stakingFeeTxnAssertLocationV1) {
Transaction.stakingFeeTxnAssertLocationV1 = vars.stakingFeeTxnAssertLocationV1
}
if (vars.stakingFeeTxnAddGatewayV1) {
Transaction.stakingFeeTxnAddGatewayV1 = vars.stakingFeeTxnAddGatewayV1
}
}
toString(): string {
return Buffer.from(this.serialize()).toString('base64')
}
static stringType(serializedTxnString: string): string {
const buf = Buffer.from(serializedTxnString, 'base64')
const decoded = proto.helium.blockchain_txn.decode(buf)
const obj = proto.helium.blockchain_txn.toObject(decoded)
return Object.keys(obj)[0]
}
static calculateFee(payload: Uint8Array): number {
return (
Math.ceil(payload.byteLength / Transaction.dcPayloadSize)
* Transaction.txnFeeMultiplier
)
}
}