This code snippet shows how to push a price up in native Agoric AMM

moveFromCentralPriceUp.js

export const moveFromCentralPriceUp = async (zoe,
                                             ammPublicFacet,
                                             secondaryR,
                                             centralR,
                                             liquidityIssuer,
                                             upperBoundry,
                                             swapInterval = 1n) => {
  const {
    swapSecondaryForCentral,
    makeCentral,
    makeSecondary,
  } = await makeLiquidityInvitations(zoe, ammPublicFacet, secondaryR, centralR, liquidityIssuer);

  const { amountOut } = await E(ammPublicFacet).getInputPrice(makeCentral(1n), makeSecondary(0n));
  let inputPriceAmountOut = amountOut;

  while (AmountMath.isGTE(upperBoundry.numerator, inputPriceAmountOut)) {
    await swapSecondaryForCentral(swapInterval);

    const { amountOut } = await E(ammPublicFacet).getInputPrice(makeCentral(1n), makeSecondary(0n));
    inputPriceAmountOut = amountOut;
    // console.log('INTER_INPUT_PRICE', inputPriceAmountOut);
  }

  return harden({ inputPriceAmountOut, swapInterval });
};