@polkadot/keyring#createTestKeyring TypeScript Examples

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Example #1

Source File: setup.ts From squid with GNU General Public License v3.0

6 votes

export async function transfer(api: ApiPromise, from: string, to: string, amount: number): Promise<number> {
    let keyring = createTestKeyring()
    let sender = keyring.getPair(from)

    let blockHash: any = await new Promise((resolve, reject) => {
        let unsub = () => {
            /* dummy */
        }
        api.tx.balances
            .transfer(to, amount)
            .signAndSend(sender, (result) => {
                if (result.isFinalized) {
                    unsub()
                    resolve(result.status.asFinalized)
                    return
                }
                if (result.isError) {
                    unsub()
                    reject(
                        result.dispatchError ||
                        result.internalError ||
                        new Error('Failed to perform transfer')
                    )
                }
            }).then(u => (unsub = u), reject)
    })

    let header: Header = await api.rpc.chain.getHeader(blockHash)
    return header.number.toNumber()
}